Coherent LabMax-Pro SSIM User Manual

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User Manual

LabMax-Pro SSIM

Laser Power Meter

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User Manual LabMax-Pro SIMM Laser Power Meter

27650 SW 95th Ave. Wilsonville, OR 97070

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LabMax-Pro SSIM User Manual

This document is copyrighted with all rights reserved. Under the copyright laws, this document may not be copied in whole or in part or repr oduced in any other media without the exp ress written perm ission of Coher ent, Inc. Permitted copies must carry the same proprietary and copyright notices as were affixed to the original. This exception does not allow copies to be made for others, whether or not sold, but all the material purchased may be sold, given, or loaned to another person. Under the law, copying includes translation into another language.

Coherent, the Coherent Logo, and LabMax are trademarks or registered trademarks of Coherent, Inc. All other trademarks or registered trademarks are the property of their respective owners.

Patents referenced in this document were active as of the printing date of the manual (see last page for date). The patents referenced herein may have expired. Y ou are advised to check to see if the patents are still active:

http://portal.uspto.gov/external/portal/pair

Every effort has been made to ensure th at the dat a given in this docume nt is accurate. The information, figures, tables, specifications and schematics contained herein are subject to change without notice. Coherent makes no warranty or representation, either expresse d or implied with respect to this document. In no event will Coherent be liable for any direct, indirect, special, incidental or consequential damages resulting from any defects in its documentation.

Technical Support

In the US:

Should you experience any difficulties with your product or need any technical information, please visit our website: www.Coherent.com Additional support can be obtained by contacting our Technical Support Hotline at 1.800.367.7890 (1.408.764.4557 outside the U.S.), or e-mail

[email protected]

the clock (except U.S. holidays and company shutdowns). If you call outside our office hours, your call will be taken by our answering

system and will be returned when the office reopens. If there are technical difficulties with your laser that cannot be resolved by

support mechanisms outlined above, e-mail, or telephone Coherent Technical Support with a description of the problem and the corrective steps attempted. When communicating with our Technical Support Department via the web or telephone, the Support Engineer r esponding to your request will require the model and Laser Head serial number of your laser system.

Outside the US:

If you are located outside the U.S., visit our website for technical assistance or contact our local service representative. Representative phone numbers and addresses can be found on the Coherent website:

www.Coherent.com

. T elephone cover age is available around

Coherent provides telephone and web technical assist ance as a service to its customers and assumes no liability thereby for any injury or damage that may occur contemporaneous with such services. These support services do not affect, under any circumstan ces, the terms of any warranty agreement between Coherent and the buyer. Operation of any Coherent laser with any of its interlocks defeated is always at the operator's o wn risk

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TABLE OF CONTENTS

Signal Words and Symbols in this Manual.......................................................................... vii

Signal Words............................................................................................................... vii

Symbols ..................................................................................................................... viii

Preface .................................................................................................................................. ix

RoHS Compliance ................................................................................................................ ix

Export Control Laws Compliance ........................................................................................ ix

Publication Updates.............................................................................................................. ix

Firmware Updates................................................................................................................. ix

Section One: Safety......................................................................................................... 1-1

Waste Electrical and Electronic Equipment (WEEE, 2002)............................................... 1-2

Declaration of Conformity.................................................................................................. 1-2

Section Two: Software Installation and Quick Start................................. 2-1

Software Installation...........................................................................................................2-1

Initial Setup Instructions..................................................................................................... 2-1

Taking a Standard-Speed Measurement.............................................................................. 2-3

Taking a High-Speed Measurement.................................................................................... 2-6

Taking a Snapshot Measurement ........................................................................................2-9

Taking a Pyroelectric Energy Measurement..................................................................... 2-15

Setting up the Cursor Feature ........................................................................................... 2-18

Section Three: Description.........................................................................................3-1

Introduction......................................................................................................................... 3-1

Operating Mode Overview ................................................................................................. 3-2

Standard-Speed Mode................................................................................................ 3-2

High-Speed Mode...................................................................................................... 3-2

Snapshot Mode .......................................................................................................... 3-3

Product Features ................................................................................................................. 3-4

LabMax-Pro PC Software Features.................................................................................... 3-5

Thermopile and PowerMax-Pro Sensor Technology.......................................................... 3-6

Thermopile Sensors ................................................................................................... 3-6

PowerMax-Pro Sensors.............................................................................................. 3-7

Applying Wavelength Compensation Accuracy................................................................. 3-8

Wavelength Compensation Accuracy........................................................................ 3-9

Section Four: Operation.............................................................................................. 4-1

Hardware............................................................................................................................. 4-1

Sensor Compatibility ..........................................................................................................4-2

USB/RS-232 ....................................................................................................................... 4-2

Power Supply...................................................................................................................... 4-2

External Trigger Input......................................................................................................... 4-2

External Trigger Output...................................................................................................... 4-4

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LabMax-Pro SSIM User Manual

Analog Output..................................................................................................................... 4-4

PC Application.................................................................................................................... 4-5

Section Five: Host Interface......................................................................................5-1

Special Considerations........................................................................................................ 5-1

Message Terminators .................................................................................................5-1

Messages Received by the Meter...................................................................... 5-1

Messages Sent by the Meter ............................................................................. 5-1

Using the RS-232 Interface........................................................................................ 5-2

Data Flow Control ............................................................................................ 5-2

Baud Rate and Other Communication Settings................................................ 5-2

Using the USB Interface............................................................................................ 5-2

Syntax and Notation Conventions ............................................................................. 5-2

Host Command Quick Reference .......................................................................................5-3

Commands and Queries...................................................................................................... 5-6

SCPI Common Commands........................................................................................ 5-6

Reset Command - *RST................................................................................... 5-6

Identification Query - *IDN?............................................................................ 5-6

System Options.......................................................................................................... 5-7

System Type...................................................................................................... 5-7

System Status.................................................................................................... 5-7

System Fault ..................................................................................................... 5-8

System Restore ................................................................................................. 5-8

System Sync...................................................................................................... 5-8

Communications........................................................................................................ 5-9

Message Handshaking ...................................................................................... 5-9

Error Record Reporting and Collection..................................................................... 5-9

Error Count Query .......................................................................................... 5-11

Error Query..................................................................................................... 5-11

All Error Query............................................................................................... 5-11

All Error Clear ................................................................................................ 5-11

Measurement Setup and Control.............................................................................. 5-12

Measurement Mode Select.............................................................................. 5-12

Measurement Data Snapshot Mode Select ..................................................... 5-12

Measurement Data Acquisition Source Select................................................ 5-13

Measurement Data Acquisition Source List Query........................................ 5-13

Speedup........................................................................................................... 5-13

Area Correction............................................................................................... 5-13

Analog Output Full Scale Voltage .................................................................. 5-14

Data Smoothing .............................................................................................. 5-14

Wavelength Correction ...................................................................................5-14

Gain Compensation......................................................................................... 5-15

Probe Zero....................................................................................................... 5-16

Pulsed Thermopile Joules Trigger Level........................................................ 5-16

Pulse Detection Measurement Window.......................................................... 5-16

Sample Variable Decimation .......................................................................... 5-17

Range Select ................................................................................................... 5-17

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Data Item Select.............................................................................................. 5-18

Measurement Data Format.............................................................................. 5-19

Trigger Parameters.......................................................................................... 5-20

Measurement Data Collection ................................................................................. 5-22

Last Data Record Query ................................................................................. 5-22

Data Gating..................................................................................................... 5-23

Meter and Probe Device Information ...................................................................... 5-23

Meter............................................................................................................... 5-23

Probe............................................................................................................... 5-25

Persistent Parameters........................................................................................................ 5-28

Host Interface Glossary .................................................................................................... 5-28

Section Six: Calibration and Warranty.............................................................6-1

Calibration .......................................................................................................................... 6-1

Coherent Calibration Facilities and Capabilities................................................................ 6-1

Limited Warranty................................................................................................................6-2

Extended Warranty.............................................................................................................. 6-2

Warranty Limitations ..........................................................................................................6-3

Obtaining Service ...............................................................................................................6-3

Product Shipping Instructions............................................................................................. 6-4

Appendix A: Specifications....................................................................................... A-1

Meter Specifications .......................................................................................................... A-1

Persistent Parameters......................................................................................................... A-2

Appendix B: Errors........................................................................................................B-1

Meter and Sensor Errors .....................................................................................................B-1

Index................................................................................................................................. Index-1

LIST OF FIGURES

1-1. Waste Electrical and Electronic Equipment Label........................................................... 1-2

3-1. Example of Detail Available When Using High-Speed Mode ........................................ 3-2

3-2. Example of Detail Available When Using Snapshot Mode............................................. 3-3

3-3. Construction of a Traditional Radial Thermopile............................................................ 3-6

3-4. Basic Configuration of a PowerMax-Pro Sensor............................................................. 3-7

3-5. The Rise Time of a Typical Mid-power Thermopile (30W) Compared with the

PowerMax-Pro........................................................................................................... 3-8

3-6. RV Spectral Correction for Thermal Sensors (Normalized to Calibration

Wavelength)............................................................................................................... 3-9

3-7. RV Spectral Correction for PowerMax-Pro Sensors (Normalized to Calibration

Wavelength)............................................................................................................. 3-10

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4-1. Meter Front Panel ............................................................................................................ 4-1

4-2. Meter Back Panel............................................................................................................. 4-1

4-3. External Trigger Input Circuitry...................................................................................... 4-2

4-4. Example Trigger Output Screens..................................................................................... 4-3

4-5. Boosting Source Current of Triggering Device............................................................... 4-3

4-6. External Trigger Output Circuitry....................................................................................4-4

4-7. Location of PC Application Help Button ........................................................................ 4-5

LIST OF TABLES

3-1. Wavelength Compensation Accuracy............................................................................ 3-10

5-1. RS-232 Communication Settings..................................................................................... 5-2

5-2. Host Command Quick Reference ....................................................................................5-3

5-3. Status Code Bit Definitions ............................................................................................. 5-7

5-4. Fault Code Bit Definitions............................................................................................... 5-8

5-5. Error Codes and Description Strings .............................................................................5-10

5-6. Data Item Selections for Measurement Data Record..................................................... 5-18

5-7. Measurement Data Record Format, ASCII.................................................................... 5-19

5-8. FLAG Bit Definitions.................................................................................................... 5-20

5-9. Persistent Parameters..................................................................................................... 5-28

6-1. Coherent Service Centers................................................................................................. 6-4

A-1. Specifications.................................................................................................................. A-1

B-1. Meter and Sensor Errors ..................................................................................................B-1

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Table of Contents

Signal Words and Symbols in this Manual

Signal Words

This documentation may contain sections in which particular hazards are defined or special attention is drawn to particular conditions. These sections are indicated with signal words in accordance with ANSI Z-535.6 and safety symbols (pictorial hazard alerts) in accordance with ANSI Z-535.3 and ISO 7010.

Four signal words are used in this documentation: DANGER, WARNING, CAUTION and NOTICE.

The signal words DANGER, WARNING and CAUTION designate the degree or level of hazard when there is the risk of injury:

DANGER! Indicates a hazardous situation that, if not avoided, will result in death or serious injury. This signal word is to be limited to the most extreme situations.

WARNING! Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

CAUTION! Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

The signal word “NOTICE” is used when there is the risk of property damage:

NOTICE!

Indicates information considered important, but not hazardrelated.

Messages relating to hazards that could result in both personal injury and property damage are considered safety messages and not property damage messages.

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Symbols

The signal words DANGER, WARNING, and CAUTION are always emphasized with a safety symbol that indicates a special hazard, regardless of the hazard level:

This symbol is intended to alert the operator to the presence of important operating and maintenance instructions.

This symbol is intended to alert the operator to the danger of exposure to hazardous visible and invisible laser radiation.

This symbol is intended to alert the operator to the presence of dangerous voltages within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock.

This symbol is intended to alert the operator to the danger of Electro-Static Discharge (ESD) susceptibility.

This symbol is intended to alert the operator to the danger of crushing injury.

This symbol is intended to alert the operator to the danger of a lifting hazard.

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Preface

RoHS Compliance

Export Control Laws Compliance

This manual has user information for the LabMax-Pro SSIM Laser Power Meter.

This Coherent product is RoHS compliant.

It is the policy of Coherent to comply strictly with U.S. export control laws.

Export and re-export of lasers manufactured by Coherent are subject to U.S. Export Administration Regulations, which are administered by the Commerce Department. In addition, shipments of certain components are regulated by the State Department under the International Traffic in Arms Regulations.

The applicable restrictions vary depending on the specific product involved and its destination. In some cases, U.S. law requires that U.S. Government approval be obtained prior to resale, export or re-export of certain articles. When there is uncertainty about the obligations imposed by U.S. law, clarification must be obtained from Coherent or an appropriate U.S. Government agency.

Publication Updates

Firmware Updates

Products manufactured in the European Union, Singapore, Malaysia, Thailand: These commodities, technology , or software are subject to local export regulations and local laws. Diversion contrary to local law is prohibited. The use, sale, re-export, or re-transfer directly or indirectly in any prohibited activities are strictly prohibited.

T o view information that has been added or changed since this publication went to print, connect to www.Coherent.com.

To get the latest version of LabMax firmware:

1. Download the LabMax-Pro SSIM Updater executable file from our website and save it to your computer.

2. Attach the meter to the PC via USB.

3. Make sure the sensor is disconnected from the meter.

4. Turn the meter ON.

5. Double-click the LabMax-Pro SSIM Updater executable file you downloaded and follow the instructions.

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LabMax-Pro SSIM User Manual

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SECTION ONE: SAFETY

Carefully review the following safety information to prevent personal injury and to prevent damage to this meter or any sensor connected to the meter. This equipment has no user-serviceable parts. For service information, refer to “Obtaining Service” (p. 6-3).

WARNING! The use and measuring of lasers can be dangerous. This instrument operates on wavelengths that include non-visible laser emissions.

Correct laser operating practice according to manufacturer recommendations is vital.

Safety

Eyewear and other personal protective equipment must be used according to applicable laws and regulations.

If in doubt as to correct operating procedures, refer to the laser manufacturer and your laser safety officer.

The equipment is not for use in critical medical environments.

WARNING! Do not operate this instrument if its panels are removed or any of the internal circuits are exposed.

WARNING! Do not operate this instrument in wet or damp conditions, or in an explosive atmosphere.

NOTICE!

Operate this instrument only within the specified voltage range.

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NOTICE!

Do not operate this instrument if there are suspected failures. Refer damaged equipment to qualified Coherent service personnel.

Waste Electrical and Electronic Equipment (WEEE, 2002)

Figure 1-1. Waste Electrical and Electronic Equipment Label

Declaration of Conformity

The European Waste Electrical and Electronic Equipment (WEEE) Directive (2002/96/EC) is represented by a crossed-out garbage container label (see Figure 1-1). The purpose of this directive is to minimize the disposal of WEEE as unsorted municipal waste and to facilitate its separate collection.

Declaration of Conformity certificates are available upon request.

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Software Installation and Quick Start

SECTION TWO: SOFTWARE INSTALLATION AND

UICK START

In this section:

• Software installation (this page)

• Initial setup instructions (this page)

• Taking a Standard-Speed measurement (p. 2-3)

• Taking a High-Speed measurement (p. 2-6)

• Taking a Snapshot measurement (p. 2-9)

• Taking a Pyroelectric energy measurement (p. 2-15)

• Setting up the Cursor feature (p. 2-18)

Software Installation

Initial Setup Instructions

To install the LabMax-Pro PC software and drivers:

1. Close all programs.

2. Insert the CD that shipped with the product into the CD-ROM drive of your computer.

3. If Autorun is enabled on your system, installation will start automatically; otherwise, double-click the file in the main folder on the CD.

4. Follow the on-screen instructions to complete the installation.

Complete the following instructions before using any of the Quick Start tutorials presented in this section.

1. Install the above).

2. Attach the PowerMax-Pro sensor to the LabMax-Pro meter by connecting the DB-25 connector.

LabMax-Pro PC

software (see “Software Installation,”

LabMax-Pro_PC_Setup.exe

3. Attach the LabMax-Pro meter to the PC via a USB 2.0 High-Speed port.

4. Turn on the meter.

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5. Start LabMax-Pro PC.

6. If a dialog screen similar to the one

7. [Main menu] Click Open Meter.

8. Select the COM port from the popup

9. View system information to confirm LabMax-Pro PC is

shown at right appears, click OK.

screen. Click the Select button to close the dialog.

detecting the meter and the sensor.

WARNING! Follow all laser safety procedures. The laser must be blocked or switched OFF before starting any of the tutorials described in this section.

WARNING! Power to the LabMax-Pro meter must be OFF before starting any of the tutorials described in this section.

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Software Installation and Quick Start

Main Menu

Measurements

Panel

Graphics

Panel

Statistics Panel

Quick Access

Toolbar

Tabs

Information and Help

Status

Bar

NOTICE!

Do not exceed the power or energy density limits of the sensor.

The following illustration shows the areas of the graphical user interface you will need to access while using the tutorials presented in this section.

Taking a Standard-Speed Measurement

This tutorial describes how to take a standard (10 Hz sampling rate) power measurement.

Notes

• This mode is compatible with PowerMax-Pro, as well as ther-

mopile and optical power sensors.

• Using a PowerMax-Pro sensor in this mode provides nearly

instant average power readings. However, because data is sampled every 100 milliseconds, temporal pulse information is not displayed. Use High-Speed or Snapshot mode to view temporal information.

• Standard-Speed mode can be used for measuring the average

power of CW or pulsed lasers. Use Standard-Speed mode when measuring the average power of high repetition rate short-pulsed lasers, such as picosecond, femtosecond, and nanosecond lasers. In this 10 Hz sampling mode, PowerMax-Pro provides extremely fast average power readings on these lasers. (Because Ultrafast and q-switched laser

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Procedure

1. Complete the “Initial Setup Instructions” (p. 2-1).

2. [Home tab] Verify the High-Speed

3. Make sure either the laser is OFF or the beam is blocked.

4. [Home tab] Press the Zero button to zero the

pulses are too fast for PowerMax-Pro to resolve temporal pulse information, and High-Speed and Snapshot mode sampling rates will alias with the high kHz pulse repetition rates, it is best to operate in Standard-Speed mode with these lasers.)

Mode checkbox is not checked.

sensor. A dialogue will display the zeroing process, which will only take a second or two.

5. [Measurement tab] Select your laser

wavelength from the drop-down menu. If your laser wavelength is not available, choose the one closest to it or, alternatively, click on [Edit Table] in the menu and add your specific wavelength to the Wavelength Table.

6. [Data Buffer tab] Enter a value in the

Capacity field that represents the sample size you would like to collect. This is also the sample size used to calculate Statistics. Check the Continuous Mode checkbox if you want data collection to continue until you stop it. Uncheck the checkbox to have data collection end after the Data buffer is full (which is when it reaches the value you entered in the Capacity field).

7. [Data Buffer tab] Enter a value in the

Sample Count field. This value represents how many samples are displayed in the Trending chart at one time.

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Software Installation and Quick Start

8. [Graphics panel] Click the Trending window.

9. Expose the sensor to the laser beam.

10. [Quick Access toolbar or Home tab] Start data collection by pressing the Start icon.

During data collection, the data is visible in the Trending chart, statistics are updating in real time (based upon data entering the buffer), and the Measurements panel displays a live reading. Here is an example output screen:

— End of tutorial —

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LabMax-Pro SSIM User Manual

Taking a High-Speed Measurement

This tutorial describes how to take a high-speed (20 kHz sampling rate) power measurement.

Notes

• High-Speed mode is only compatible with PowerMax-Pro

sensors.

• A data point is sampled every 50 microseconds, making this

mode very useful for real-time visualization of temporal shape of modulated lasers with pulse lengths hundreds of microseconds or longer. This mode also provides fast feedback about changes in power output from CW sources.

• High-Speed mode is also used to set up Snapshot

mode—primarily by confirming the meter is accurately triggering on the laser pulses before moving into Snapshot mode. Refer to “Taking a Snapshot Measurement” (p. 2-9).

• To avoid aliasing effects between the meter sampling rate and

the laser pulses, this mode cannot be used with lasers modulated at over 2.5 kHz pulse repetition frequency.

Procedure

1. Complete the “Initial Setup Instructions” (p. 2-1).

2. [Home tab] Verify the High-Speed Mode checkbox is checked.

3. Make sure either the laser is OFF or the beam is blocked.

4. [Home tab] Press the Zero button to zero the sensor. A dialogue will display the zeroing process, which will only take a second or two.

5. [Home tab] Click the Range drop-down menu and select one of the three ranges that are available: AUTO (for auto-range), and two fixed ranges signified by power limits (High and Low).

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Software Installation and Quick Start

6. [Measurement tab] Select your laser

7. [Data Buffer tab] Verify that the

Enable Snapshot Mode checkbox is not checked.

8. [Data Buffer tab] Enter a value in the

T ip: If the application displays a “Missing” warning, it means data was lost while transferring the data in real time from the meter's buffer to the PC. This usually occurs because the computer is not able to keep up with the high rate of data continuously streaming from the meter. If this warning occurs, ensure the USB connection is a USB 2.0 High-Speed port and close other open applications. Another option is to reduce the Capacity buffer size. You can also export the data file to examine the error indicators to determine where and how much data was lost.

9. [Data Buffer tab] Enter a value in the

Sample Count field. This value represents the number of samples you want displayed in the Trending window at one time.

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10. [Graphics panel] Click the Trending window.

11. Expose the sensor to the laser beam.

12. [Quick Access toolbar or Home tab] Start data collection by pressing the Start icon. Note the loading indicator () turns green while the data is loading.

— End of tutorial —

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Software Installation and Quick Start

Taking a Snapshot Measurement

This tutorial describes how to take a Snapshot (625 kHz sampling rate) power measurement.

Notes

• Snapshot mode is only compatible with PowerMax-Pro

sensors.

• This is a special acquisition mode that captures high-speed

data at 625 kHz or at 1.6 microseconds per sample (capture rate to the internal buffer inside the meter). Due to the h igh rate of data acquisition in this mode, it is necessary to temporarily store the data in the instrument’s hardware buffer, as it is not possible to upload it in real-time via USB. Once the data acquisition is complete, the instrument uploads the data to the PC, where it is placed in the Capture buffer and displayed in the software.

• To avoid aliasing effects between the meter sampling rate and

the laser pulses, do not use this mode with lasers modulated at over 80 kHz pulse repetition frequency.

Process

During Snapshot mode, the hardware waits for a trigger event before acquiring data. The process works like this:

1. You define the data acquisition settings (including trigger settings), enable Snapshot mode, and press Start.

2. The meter searches for a trigger and the user interface waits for the meter to start sending data.

3. When a trigger is found, the meter starts filling its own Capture buffer.

4. When the buffer is full, the data is sent to the user interface, which displays it.

Procedure

The first part of the procedure is to define the data acquisition settings, including trigger settings. This is done in High-Speed mode.

1. Complete the “Initial Setup Instructions” (p. 2-1).

2. [Home tab] Verify the High-Speed Mode checkbox is checked.

3. Make sure either the laser is OFF or the beam is blocked.

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4. [Home tab] Press the Zero button to zero the

5. [Home tab] Click the Range

6. [Measurement tab] Select your laser

sensor. A dialogue will display the zeroing process, which will only take a second or two.

drop-down menu and select one of the two fixed ranges (which signify the maximum power limits for each range).

Note: Snapshot does not support Auto ranging.

7. [Data Buffer tab] Verify that the

Enable Snapshot Mode checkbox is not checked.

8. [Data Buffer tab] Verify that the Continuous Mode checkbox is not checked, and then enter a value in the Capacity field (20,000 represents one second of data collection, which should be adequate to set up Snapshot mode). The purpose of this step is to confirm good data collection and proper pulse triggering.

9. [Data Buffer tab] Enter a Sample Count of 1500 and an Update Period of 0.5. These are good values with which to start.

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Software Installation and Quick Start

10. [Trigger tab] Enter a

Level setting in Watts that represents a level approximately 50% between zero and the peak power you expect each pulse to have. If you do not know peak power, enter a Level setting between zero and the average power. Verify that Source is set to Internal, Edge is set to Positive, and Delay is set to 0 (zero).

11. [Trending window] Make sure the Show Trigger Markers

checkbox is checked (Settings drop-down menu, under the Views tab). This allows you to confirm the meter is auto triggering on the pulses, which is required before entering Snapshot mode.

12. Expose the sensor to the laser beam.

13. [Quick Access toolbar or Home tab]

Start data collection by pressing the Start icon.

14. [T rending window] After data collection is complete, confirm

that each pulse has a trigger marker, represented by a red vertical line plotted at each trigger event. The green line represents the trigger threshold level. If the red trigger ma rkers are not visible, or are not consistently triggering on each pulse event, go back and adjust the Trigger Level setting in the

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Now that trigger events are occurring and pulses are properly displaying, it’s time to move into Snapshot mode.

The laser does not need to be firing onto the sensor during the next several steps of this tutorial. You will be asked to fire the laser again in step 20.

Trigger tab. Keep repeating this process until trigger events are occurring as expected.

15. [Data Buffer tab] Check the Enable Snapshot Mode checkbox.

16. When Snapshot mode is activated, a warning dialog such as the one shown below will appear if particular settings (such as Range and Data Buffer) are not set up correctly. If this happens, click the Confirm Changes button and the application will automatically adjust those settings for you.

17. [Data Buffer tab] Click the Change Settings button.

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Software Installation and Quick Start

18. [Data Buffer tab] Adjust the capacity up or down by typing in

a new value or using the slider . How long a Snapshot you want to use depends on the laser pulse length and how many pulses you want to capture.

In this example, the default setting is the maximum capacity of 240,000 samples, which is collected in 384 milliseconds. If you want to capture the portion of the first pulse before the trigger event, add in some pre-trigger samples. (If this is 0 (zero), Snapshot will begin at the time of the trigger event, which occurs after the first pulse begins.) Click the Save button to close the dialog.

Tip: Reducing the number of samples allows pulses to be viewed with higher resolution in the trend chart. If you do not see as high a resolution as desired, try setting the capacity duration much lower, such as ten times the pulse repetition period.

19. [

Quick Access toolbar

Home tab

] Start data collection by pressing the Start icon. A Snapshot Mode icon () will appear in the Status bar at the bottom of the application and display a

red oscillating bar until the laser fires

and a trigger event is detected.

20. Fire the laser . If no trigger event is detected, the Snapshot icon will remain in the red waiting mode. If this happens, there are two options: 1) Press the Force Trigger button (to the right of the red oscillating bar). This will force the meter into collecting Snapshot data, regardless of whether or not it finds a trigger. 2) Press Stop and readjust the trigger settings in High-Speed mode. If a trigger event is detected, the Snapshot Mode icon ( ) will turn green and actively display the progress of loading the data from the internal Snapshot buffer in the meter to the PC application. This can take several seconds, depending upon the size of the Snapshot Capacity setting.

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After the Snapshot data is loaded, the result is plotted in the Trending window . Zoom in to observe detailed temporal pulse infor mation, as shown in the examples below.

There are three ways to zoom a view:

1. Drag the mouse to define a portion of the display.

2. Use the mouse wheel to zoom in or out.

3. Use the scroll bar to define a portion of the display (by dragging either the left or right handle of the scroll bar) or scroll the display (by dragging the scroll bar to the left or right).

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Software Installation and Quick Start

Taking a Pyroelectric Energy Measurement

— End of tutorial —

This tutorial describes how to take an energy reading with a pyroelectric sensor.

Procedure

1. Complete the “Initial Setup Instructions” (p. 2-1).

2. [Home tab] Select Energy Joules

Mode and the energy range (typically the next higher range than the expected energy level being measured).

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3. Make sure either the laser is OFF or the beam is blocked.

4. [Measurement tab] Select your laser

5. [Data Buffer tab] Enter a value in the

6. [Data Buffer tab] Enter a value in the Sample Count field. This value represents the number of samples you want displayed at one time in the Trending window.

7. [Trigger tab] Set an appropriate Trigger Level (based on either units of joules or percent) and also set the Source to Internal.

Tip: If the energy level being measured is known, you can enter the trigger level as a joules value that is lower than the expected energy level to be measured. You can also set the trigger level as a percent of the currently-selected energy range. The trigger level is a threshold used to determine which signals will be collected as energy measurements and which signals will be ignored as noise.

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Software Installation and Quick Start

Setting the trigger level too high can result in actual energy pulses being missed. Setting the trigger level too low can result in noise being picked up as readings. Set the trigger level at a threshold below the energy being measured and above the noise level of the sensor. To view the acceptable limits for the trigger level settings, hover the cursor over these settings in the software.

8. [Graphics panel] Click the Trending window.

9. Expose the sensor to the laser beam.

10. [Quick Access toolbar or Home tab]

Start data collection by pressing the Start icon.

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Tip: Monitor both the energy level being measured and the rep rate calculation to determine if the meter is triggering appropriately. If those readings do not match the readings expected from the laser, readjust the trigger level setting until the energy level and the rep rate fall within an acceptable range.

— End of tutorial —

Setting up the Cursor Feature

This tutorial describes how to set up the Cursor feature within the LabMax-Pro PC software.

The Cursor feature is a powerful tool for analyzing pulses that have been captured in the LabMax-Pro software. You can use it either after stopping live data collection or after importing a saved data file into the software.

Procedure

1. [Graphics panel] Click the “Settings” drop-down menu in the Trending window.

2. Check “Show Selection Bounds Cursors” checkbox on the drop-down menu.

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Software Installation and Quick Start

Cursors can be dragged within the trend screen to fit around certain pulse shapes or features.

Based on the region of the plot selected by the cursors, the “Selection Bounds” statistics automatically update.You can use the “Time Axis - W idth” measurement to determine pulse width, rise-time, or fall-time of a pulse in the plot. The software also shades the area under the curve within the cursors and calculates the energy of a pulse or pulses within that region.

The Energy Baseline setting can be used to determine if the pulse energy calculation is based on the 0 mW baseline level or the lower cursor level.

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The “Snap To Triggers” setting can be used to set the cursors to the trigger point at the beginning of successive pulses. Then the “Time Axis - Width” measurement can be used to determine the period between pulses.

To reset the cursors to their original positions, make sure “Snap To Triggers” is not checked, then uncheck and recheck the “Show Selection Bounds Cursors” checkbox. This will reset the cursors in the Trend display.

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— End of tutorial —

Page 35

SECTION THREE: DESCRIPTION

In this section:

• Introduction (this page)

• Operating mode overview (page 3-2)

• Product features (page 3-4)

• LabMax-Pro PC software features (page 3-5)

• Thermopile and PowerMax-Pro Sensor technology (page 3-6)

• Applying wavelength compensation accuracy (page 3-8)

Description

Introduction

The LabMax-Pro represents the next generation of Coherent's groundbreaking LabMax line. This power meter combines the power and versatility of the LabMax, with two new high-speed sampling modes when used with PowerMax-Pro technology (patent pending). Coherent has developed the LabMax-Pro SSIM laser power meter to fully capitalize on the capabilities of PowerMax-Pro sensors. The meter is also compatible with PM model thermopiles in the standard operating mode.

LabMax-Pro SSIM is packaged as a Smart Sensor Interface Module (SSIM) that interfaces with a host computer through either USB or RS-232. LabMax-Pro PC, a new Windows PC application, then enables instrument control and displays measurement results—including laser tuning, high-fidelity pulse shape visualization and energy integration—on a host computer. The software provides a wide range of analytical functions, including live statistics, histograms, trending and data logging. The user interface permits flexible sizing of informational panes within the application, in which contents are auto-sized dynamically as the panes are adjusted, letting the user size the information of greatest importance. Also, a complete set of host commands can be sent through either the USB or RS-232 interface, which is useful for embedded applications.

Besides PC interfacing, LabMax-Pro SSIM also includes an analog output with user-selectable voltages of 0 to 1V, 2V, or 4V. Triggering is done with either an external trigger input or a user-adjustable internal trigger.

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Operating Mode Overview

Standard-Speed Mode

High-Speed Mode

LabMax-Pro SSIM uses three operating modes:

• Standard-Speed

• High-Speed

• Snapshot

These are discussed, next.

The Standard-Speed operating mode of the LabMax-Pro SSIM uses a typical 10 Hz sampling rate. At this data rate, PowerMax-Pro sensors supply an almost instantaneous power reading, similar to a photodiode, while also taking advantage of the sensor's ability to directly read very high powers. The standard operating mode is best used to measure the power of CW lasers or the average power of high-repetition rate lasers.

High-speed mode operates at a continuous data sampling rate of 20 kHz, permitting pulse shape analysis of modulated lasers with repetition rates up to 2.5 kHz. These types of pulse trains are common in many laser-based medical treatments and some material processing applications, such as micro welding.

Figure 3-1, below, shows data collected using a 20W CO2 laser to show the type of detail you can get in this mode.

Figure 3-1. Example of Detail Available When Using High-Speed Mode

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Description

Snapshot Mode

A faster high-speed sampling mode—“Snapshot Mode”—provides burst sampling at a rate of 625 kHz for a maximum of 384 milliseconds. This mode lets you see the temporal characteristics of modulated pulses used in commercial cutting, engraving and drilling applications, as well as long pulses and pulse trains used in aesthetic medical applications. This temporal detail shows the true performance of the laser—previously masked by slow thermopiles—thereby providing more information to assist setting up process recipes and for monitoring system performance in manufacturing.

Figure 3-2, below, shows the data quality and high pulse shape fidelity that is achievable.

Modulated 10.6 µm CO2 Laser

50 µs PW 8 kHz PRF 40% Duty Cycle

Figure 3-2. Example of Detail Available When Using Snapshot Mode

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Product Features

• USB 2.0 “High-Speed” and RS-232 connectivity.

• Instrumentation platform is compatible with PM model ther-

mopile sensors, PowerMax-Pro sensors, LM model position-sensing thermopiles, LM-2 & OP-2 optical sensors, and EnergyMax DB-25 pyroelectric energy sensors.

• High-speed sampling up to 625 kHz for laser temporal pulse

analysis when used with PowerMax-Pro sensors.

• Operation up to 10 kHz each pulse with pyroelectric sensors.

• Windows PC application included. Updates are available from

within the application or from the Coherent website.

• 32-bit and 64-bit Microsoft™ Windows™ 7 and W indows™ 8

compatibility.

• Direct host command support for OEM integration.

• The meter's internal firmware is field upgradeable, so you can

have access to the latest LabMax features.

• High resolution and fast analog-to-digital converter supports

up to five digits of resolution and measurement accuracy equivalent to that found in Coherent's other LabMax meters.

• Meter supports spectral compensation for accurate use at

wavelengths that are different from the calibration wavelength. Each sensor receives a different spectral compensation curve specific to the responsivity of its specific element, as well as transmission characterization of any associated optics.

• Long-pulse joules capability with thermopile sensors in Stan-

dard operating mode

• Trending mode includes adjustable x-y cursors and energy

integration of captured pulses using PowerMax-Pro sensors.

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LabMax-Pro PC Software Features

Description

Plug-and-play application software is supplied and includes the following features:

• Trending Feature

• Trend average power stability over time.

• Visualize and track pulse shape and peak power. High

fidelity resolution of temporal pulses greater than 10 microseconds.

• Beam position target and trend chart when used with posi-

tion-sensing LM model thermopiles.

• Statistics (mean, minimum, maximum, stability and standard

deviation)

• Export comma or tab-delimited data for analysis in a spread-

sheet—for example, Microsoft™ Excel™—or import directly back into LabMax PC application.

• Tuning (needle dial or bar graph)

• Histogram

• Run multiple instances of software to operate multiple sensors

at the same time.

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For system integrators and for implementations that include customer-written software, the sensors have a comprehensive command set that is easy to access:

• USB driver is a Virtual COM port and supports simple ASCII

• Using customer-written software, the remote interfacing host

• National Instruments™ LabVIEW™ examples for easy

Thermopile and PowerMax-Pro Sensor Technology

host commands for remote interfacing.

command set permits sensors to be remotely controlled.

LabVIEW integration.

Thermopile Sensors

For many years thermopiles have been the detector of choice for high power lasers. These detectors operate on the thermoelectric principle in which thermal energy is converted into electrical energy. The typical thermopile has a central, light absorbing disk, a series of thermocouples that surround the disk, and an annular heatsink around the ring of thermocouples—refer to the following figure.

Figure 3-3. Construction of a Traditional Radial Thermopile

In operation, incident laser energy falls on the absorbing disk in the center of the detector and is converted into heat. This disk is typically coated with a material that absorbs light over a very broad

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Description

wavelength range to increase sensitivity. The heat then flows across the width of the thermopile disk to the heatsink, which is held at a near constant ambient temperature by either air or water cooling. The temperature difference between the absorber and heatsink is converted into an electrical signal by the thermocouples. Calibrated electronics in the meter convert this electrical signal into a laser power reading.

Thermopile sensors have several advantages, including a very broad spectral range, an ability to work over a wide range of input powers, high laser damage resistance and uniform spatial response (meaning insensitivity to changes in beam size, position or uniformity). The limitation of the technology is that the transfer of heat across the width of the thermopile disk makes this technology inherently slow . Specifically , it frequently takes several seconds before the heat flow caused by the laser reaches equilibrium and the power measurement becomes stable on the display. Physically larger sensors take longer to reach this stable state. This slow response time makes thermopiles best suited for measuring CW laser power . For pulsed lasers, the best they can deliver is average power over a finite time interval, or total integrated energy from a long burst of pulses.

PowerMax-Pro Sensors

Coherent developed PowerMax-Pro technology to meet the growing need for a laser power sensor that offers the broad wavelength sensitivity , lar ge dynamic range and high damage resistance of a thermo- pile, with the fast response speed approaching that of a semiconductor photodiode. The PowerMax-Pro is constructed and configured differently than a thermopile. Specifically, in this device the heat flows vertically through the detector and the electrical field that is generated moves perpendicular to the heat flow—refer to Figure 3-4, below.

Figure 3-4. Basic Configuration of a PowerMax-Pro Sensor

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The materials used in this sensor are a stack of films which have layer thicknesses on the order of microns. Incident laser light is absorbed and generates heat which can flow very quickly through these thin layers to the heatsink below the detector, where it is dissipated. The electrical signal from the thin film layers moves laterally to the edges of the device where it is measured by tapping into the sensor electrodes.

Compared with the traditional radial-flow thermopile—which has a sensing time constant value of several seconds—the time constant for the thin film configuration is in the microsecond range. This enables the sensor to supply an essentially instant power measurement without any overshoot—refer to Figure 3-5, below. The PowerMax-Pro sensor preserves the main benefits of the traditional thermopile architecture, namely large active area (30 mm x 30 mm), wide dynamic range (50 mW to 150W), high damage resistance (14 kW/cm²) and broad wavelength range (300 nm to 11 µm).

Figure 3-5. The Rise Time of a Typical Mid-power Thermopile (30W) Compared with the

PowerMax-Pro

The response speed of PowerMax-Pro sensors lets users move beyond just measuring average power and enables visualization of the temporal pulse shape and peak power of modulated lasers with pulse lengths greater than 10 µs. These pulses can be integrated to calculate individual pulse energy.

Applying Wavelength

Overall measurement accuracy is a combination of the meter and sensor calibration uncertainties. For an up-to-date list of all compatible sensors and their specifications, go to www.Coherent.com/LMC.

Compensation Accuracy

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Description

U2 = + W

Measurement Accuracy =

where:

= Percent Calibration Uncertainty

W = Wavelength Accuracy

Wavelength Compensation Accuracy

The combined accuracy is based upon practices outlined in the

National Institute of Standards Guidelines for Evaluating and Expressing Uncertainty (NIST Technical Note 1297, 1994 Edition).

The combined accuracy of the measurement is calculated by using the law of propagation of uncertainty using the “root-sum-of-square” (square root of the sum of squares), sometimes described as “summing in quadrature” where:

Coherent uses several coatings to capture the incident radiation on thermal sensors. The specifications list which coating is for each sensor. Typical wavelength ranges and response curves for these coatings are shown below. Each sensor has a spectral curve generated from reflectance measurements taken with spectrometers or direct laser lines. The reflectance data are converted into a wavelength compensation look-up table that is loaded into the sensor. This data is accessed by selecting a wavelength of operation in the software.

Figure 3-6. RV Spectral Correction for Thermal Sensors (Normalized to Calibration

Wavelength)

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Figure 3-7. RV Spectral Correction for PowerMax-Pro Sensors (Normalized to Calibration

Wavelength)

Table 3-1. Wavelength Compensation Accuracy

Sensor

All PM model thermopiles ± 1.5% 10600 PowerMax-Pro HD Coating ± 3% 810 PowerMax-Pro BB Coating ± 2% 810

a. Refers to wavelengths different from the calibration wavelength.

Wavelength Compensation

Accuracy

Wavelength (nm)

Calibration

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Hardware

Power

Trigger Output

Port

Analog Output

Port

DB-25

Port

External Trigger

Input Connector (Type SMB)

Power

Jack

Operation

SECTION FOUR: OPERATION

In this section:

• Hardware (this page)

• Sensor compatibility (p. 4-2)

• USB/RS-232 (p. 4-2)

• Power supply (p. 4-2)

• External trigger input (p. 4-2)

• External trigger output (p. 4-4)

• Analog output (p. 4-4)

• PC application (p. 4-5)

USB

Switch

Connector (Type SMB)

RS-232

Connector (Type SMB)

Figure 4-1. Meter Front Panel

Figure 4-2. Meter Back Panel

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Sensor Compatibility

USB/RS-232

Power Supply

External Trigger Input

PowerMax-Pro, PM model thermopiles, LM model thermopiles, OP-2 & LM-2 optical sensors, and DB-25 EnergyMax sensors.

LabMax-Pro requires a USB 2.0 High-Speed USB to communicate with the PC. (RS-232 connections are intended for OEM integration and will cause reduced data transfer rates.)

Power is supplied through an external 12 VDC/15W power supply (included).

To prevent ground loop noise from interfering with accurate measurement, the external SMB trigger input is optically isolated from the LabMax-Pro internal ground by an optoisolator. The following figure shows a simplified schematic of the external trigger input circuitry.

Figure 4-3. External Trigger Input Circuitry

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Figure 4-4 shows examples of trigger outputs.

Yellow = external trigger input Blue = optocoupler to output logic

+ 5V

BNC

Buffer Circuit

Operation

Figure 4-4. Example Trigger Output Screens

Trigger input pulse must be 3 to 6V, 500 nS pulse from a 50 ohm source. If a current source is used, the minimum trigger current is 5 mA. One possible buffer circuit is shown in Figure 4-5.

LabMax

Instrument Trigger Signal

Common

Trigger In

Figure 4-5. Boosting Source Current of Triggering Device

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The external trigger signal can be either a rising or a falling edge. Trigger polarity is selected in the SETUP: Trigger menu.

NOTICE!

T rigger signals gr eater than 7 VDC can damage the optoisolator and should be avoided.

External Trigger Output

The Trigger Out SMB connector is a 15 nS, 5V pulse from a 50 ohm source. It is designed to cascade into another device’s trigger input.

Figure 4-6. External Trigger Output Circuitry

Analog Output

When power is on, the Analog Out SMB connector outputs a voltage in proportion to the current laser measurement. The output voltage is zero (0) volts when the measured energy or power is zero (0) or less. The output voltage is the full-scale output voltage when the measured energy or power is full-scale or over-ranged. The full-scale output voltage (1, 2, or 4V from a 50 ohm source) is selected via the meter or the host interface. Factory default full-scale output voltage is 2V.

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Operation

Help Button

PC Application

Figure 4-7. Location of PC Application Help Button

For detailed information about LabMax-Pro PC, open the software and launch the Help file by clicking the Help button at the top right of the screen.

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SECTION FIVE: HOST INTERFACE

Special Considerations

Host Interface

In this section:

• Special considerations (this page)

• Host Command quick reference (p. 5-3)

• Commands and queries (p. 5-6)

• Persistent parameters (p. 5-28)

• Host Interface glossary (p. 5-28)

Message Terminators

Messages Received by the Meter

Messages Sent by the Meter

Messages between the meter and the host computer are comprised entirely of ASCII string characters. All ASCII message strings passing through the host interface are terminated to signal the end of a message string.

Messages received by the sensor must be terminated by a carriage return (decimal 13). Line feed characters (decimal 10) are discarded so message terminator flexibility can be attained. A command or query is considered incomplete without the terminator. The maximum length of any message received by the meter is limited to 200 bytes.

All messages sent by the meter are terminated by a carriage return (decimal 13) and line feed (decimal 10) pair.

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Using the RS-232 Interface

Data Flow Control No software or hardware flow control methods for serial communi-

cation is used.

Baud Rate and Other Communication Settings

Using the USB Interface

Syntax and Notation Conventions

The host must use a fixed baud rate setting of 115200, 8-bit, 1-stop bit, no-parity. Refer to the following table:

Table 5-1. RS-232 Communication Settings

Baud 115200

Parity None Data bits 8 Stop bits 1

Flow control None

When the meter is connected to a host via USB, it is viewed as a virtual serial communications port.

Syntax and notation conventions specified by the SCPI Standard are followed for all SCPI commands and queries unless otherwise specified. Refer to the SCPI Standard for more information.

The base-10 numeric data format specification is used heavily in this section. Unless otherwise specified, numeric data items are represented as:

• Integer values

• Non-scientific notation floating point values

• Scientific notation floating point values (uppercase or lower-

case E)

For example, the following data values are functionally equivalent:

• 31256

• 31256.0

• 3.1256e4

• 31.256e3

• +3.1256e+4

Unless otherwise specified, non-numeric data items (typically referred to as strings) are not quoted.

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Host Interface

Host Command Quick

The following table gives a brief description of all LabMax-Pro host commands. For detailed information about a specific command, go to the page referenced in the right-hand column.

Reference

Table 5-2. Host Command Quick Reference (Sheet 1 of 3)

Command Description Page #

SCPI Common Commands

*RST *IDN? Gets the meter identification string. 5-6

SYSTem:TYPE? Returns the system type string. 5-7 SYSTem:STATus? Gets the system status code. 5-7 SYSTem:FAULt? Gets the system fault code. 5-8 SYSTem:RESTore Restores all user settings to the factory state. 5-8 SYSTem:SYNC Resets the system measurement sync timer. 5-8 SYSTem:SYNC? Gets the system measurement sync timer. 5-8

SYSTem:COMMunicate:HANDshaking SYSTem:COMMunicate:HANDshaking? Sets the state of SCPI message round trip handshaking. 5-9

Resets all operational parameters to their power-on states.

System Options

Communications

Selects the state of SCPI message round trip handshaking.

5-6

5-9

Error Record Reporting and Collection

SYSTem:ERRor:COUNt? SYSTem:ERRor:NEXT? Gets the next error record(s) in the error queue. 5-11 SYSTem:ERRor:ALL? SYSTem:ERRor:CLEar Clears all error records in the error queue. 5-11

Gets the number of error records in the error queue at the time of the query.

Gets all error records in the error queue at the time of the query.

5-11

Measurement Setup and Control

CONFigure:MEASure:MODe CONFigure:MEASure:MODe? Gets the measurement mode of the instrument. 5-12 CONFigure:MEASure:SNAPshot:SELect

CONFigure:MEASure:SNAPshot:SEL? CONFigure:MEASure:SNAPshot:PREbuffer Sets the pre-trigger buffer size in samples. 5-12

CONFigure:MEASure:SNAPshot:PREbuffer? Gets the pre-trigger buffer size in samples. 5-12 CONFigure:MEASure:SOURce:SELect CONFigure:MEASure:SOURce:SEL? Gets the current data channel. 5-13 CONFigure:MEASure:SOURce:LIST?

Sets the instrument to a measurement mode of dBm, Watts or Joules.

Sets the instrument to acquire data in a burst or snapshot fashion.

Gets status of instrument to acquire data in a burst or snapshot fashion.

Sets the instrument to acquire data from either the slow or fast channel.

Returns a list of available source channel selections for the attached probe.

5-12

5-13

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Table 5-2. Host Command Quick Reference (Sheet 2 of 3)

Command Description Page #

CONFigure:SPEedup Sets the speedup state. 5-13 CONFigure:SPEedup? Gets the speedup state. 5-13 CONFigure:AREA:CORRection Enables/disables area correction. 5-13 CONFigure:AREA:CORRection? Gets the area correction state. 5-13 CONFigure:AREA:APERture Sets the aperture area. 5-13 CONFigure:AREA:APERture? Gets the size of the aperture area. 5-14

CONFigure:AOUT:FSCale

CONFigure:AOUT:FSCale? CONFigure:AVERage:TIME Sets the display data smoothing to either ON or OFF. 5-14

CONFigure:AVERage:TIME? Gets the current state of display data smoothing. 5-14 CONFigure:WAVElength:CORRection Enables/disables wavelength correction. 5-14 CONFigure:WAVElength:CORRection? Gets the current state of wavelength correction. 5-14 CONFigure:WAVElength:WAVElength Sets the current wavelength. 5-15

CONFigure:WAVElength:WAVElength? CONFigure:WAVElength:LIST? Gets the wavelength table entries from the probe 5-15

CONFigure:GAIN:COMPensation Enables/disables gain compensation. 5-15 CONFigure:GAIN:COMPensation? Gets the current state of gain compensation. 5-15 CONFigure:GAIN:FACTor Sets the gain compensation factor. 5-16 CONFigure:GAIN:FACTor? Gets the current gain compensation factor. 5-16

CONFigure:ZERO

TRIGger:PTJ:LEVel

TRIGger:PTJ:LEVel?

CONFigure:MEASure:WINdow

CONFigure:MEASure:WINdow?

CONFigure:DECimation

CONFigure:DECimation? CONFigure:RANGe:SELect Selects the meter measurement range. 5-17

CONFigure:RANGe:SELect? Gets the granted full scale measurement range. 5-17 CONFigure:RANGe:AUTO

CONFigure:RANGe:AUTO?

Selects the full scale output voltage at the analog output connector.

Gets the full scale output voltage at the analog output connector.

Gets the current, maximum allowed, or minimum allowed wavelengths

Sets the current measurement as the zero baseline measurement.

Selects the Pulsed Thermopile Joules mode trigger sensitivity level.

Gets the sensitivity level of the Pulsed Thermopile Joules mode trigger.

Selects the Pulsed Thermopile Joules mode trigger sensitivity level.

Gets the Pulsed Thermopile Joules mode trigger sensi tivity level.

Sets the decimation rate for the fast data acquisition channel.

Gets the decimation rate for the fast data acquisition channel.

Enables/disables automatic selection of the meter measurement range.

Gets the current state of automatic selection of the meter measurement range.

5-14

5-15

5-16

5-17

5-18

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Host Interface

Table 5-2. Host Command Quick Reference (Sheet 3 of 3)

Command Description Page #

CONFigure:RANGe:LIST? Gets the rang e table entries from the probe. 5-18 CONFigure:ITEMselect Selects data items that appear in a measurement record. 5-18

CONFigure:ITEMselect? TRIGger:SOURce Selects the trigger source. 5-20

TRIGger:SOURce? Gets the current trigger source. 5-20 TRIGger:LEVel Sets the trigger level 5-20 TRIGger:LEVel? Gets the current trigger level. 5-20 TRIGger:PERcent:LEVel Sets the trigger level 5-21 TRIGger:PERcent:LEVel? Gets the trigger level 5-21 TRIGger:SLOPe Selects the external trigger edge. 5-21 TRIGger:SLOPe? Gets the current external trigger edge. 5-21 TRIGger:DELay Selects the external trigger delay time. 5-22 TRIGger:DELay? Gets the external trigger delay time. 5-22 TRIGger:SEQuence Sets the sequence ID. 5-22

Gets the data items that appear in a measurement record.

5-18

Measurement Data Collection

READ?

STARt STOP Disables data streaming interface transmission. 5-23

FORCe Forces a data transmission when in Snapshot mode. 5-23

Gets the last recorded measurement at the time of the query.

Enables data streaming for a continuous or fixed transmission.

5-22

5-23

Meter and Probe Device Information

SYSTem:INFormation:INSTrument:SNUMber? Gets the meter serial number. 5-23 SYSTem:INFormation: INSTrument:PNUMber? Gets the meter part number. 5-24 SYSTem:INFormation: INSTrument:MODel? Gets the model name. 5-24 SYSTem:INFormation:INSTrument:CDATe? Gets the calibration date. 5-24 SYSTem:INFormation: INSTrument:MDATe? Gets the manufacturing date. 5-24 SYSTem:INFormation:INSTrument:TYPE? Gets the meter type. 5-24 SYSTem:INFormation: INSTrument:FVER? Returns the firmware version of the meter. 5-25 SYSTem:INFormation:FPGA:HVER? Returns the hardware version of the FPGA in the meter. 5-25 SYSTem:INFormation: FPGA:FVER? Returns the firmware version of the FPGA in the meter. 5-25 SYSTem:INFormation:PROBe:TYPE? Gets the currently-connected probe type. 5-25 SYSTem:INFormation:PROBe:MODel? Gets the currently-connected probe model. 5-26 SYSTem:INFormation:PROBe:SNUMber? Gets the serial number of the probe. 5-26

SYSTem:INFormation:PROBe:RESPonsivity? SYSTem:INFormation:PROBe:CDATe? Gets the calibration date of the probe. 5-27

SYSTem:INFormation:PROBe:TEMPerature? Gets the head temperature of the probe. 5-27 SYSTem:INFormation:PROBe:DIAMeter? Gets the probe diameter. 5-27

Gets the currently-connected probe calibration responsivity.

5-26

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Commands and Queries

SCPI Common Commands

Reset Command - *RST

Identification Query *IDN?

The SCPI Standard specifies a standard set of common commands. All common commands and queries start with an asterisk.

This command resets all operational parameters to their power-on states. Reset does not affect calibration settings or user persistent settings.

Command: *RST Query: none

This query gets the meter identification string, such as model name, firmware version, and firmware date.

Command: none Query: *IDN? Reply: “Coherent, Inc - LabMax-Pro SSIM” + <type> + “ - ” +

<version> + “ - ” + <firmware date> The dash sign separates all fields within the reply string. The first

field is always “Coherent, Inc”. The second field is the product name, “LabMax-Pro SSIM”. The third field is the version number, having the format “V<major>.<minor><optional qualifier characters>”. The fourth field is the firmware date, having the form “<3 character month name> <day of the month> <year>”. The reply string is not quoted.

For example, a typical identification string looks like: “Coherent, Inc - LabMax-Pro SSIM - V1.0 - Jun 11 2013”

Note: The quotes are not transmitted.

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Host Interface

System Options

The system commands and queries access functionality that is exclusive of the sensor measurement functions. These commands can be sent at any time without affecting a measurement in progress.

System Type This query returns the system type string. For example, a typical

type string looks like: “SSIM” Note: The quotes are not transmitted Command: none Query: SYSTem:TYPE?

Reply: SSIM

System Status This query gets the system status code. The status code is returned

in a string expressed in uppercase hexadecimal integer form. The 32-bit word represents a bit-mapped status indicator. Table 5-3 describes the status condition bit mapping.

Table 5-3. Status Code Bit Definitions

Bit Mask Bit Label Status Description

2 00000004 Probe Attached A valid probe is attached 3 00000008 Identifying Probe Identifying probe is in progress

18 00040000 Zeroing Zeroing is in progress 19 00080000 Ready / Calculating 20 00100000 FPGA updating FPGA firmware update in progress

31 80000000 System Fault A system fault occurred, check SYSTem:FAULt

Applies to Joules mode only when a power probe is attached; Ready = 0, Calculating = 1

Command: none Query: SYSTem:STATus?

Reply: <status> System

As an example, if a probe is found, but there is a general fault, the system status query returns:

00040004 (Probe attached and ready to use, meter zeroing in prog- ress)

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System Fault This query gets the system fault code. The fault code is returned in

a string expressed in uppercase hexadecimal integer form. The 32-bit word represents a bit-mapped status indicator. Table 5-4 describes the fault condition bit mapping.

Table 5-4. Fault Code Bit Definitions

Bit Mask Bit Label Description

0 00000001 No Sensor No sensor is attached to the SSIM 1 00000002 Sensor overtemp Sensor damage temperature is exceeded 2 00000004 Sensor communication Sensor EEPROM communication failure 3 00000008 Sensor Checksum Sensor checksum invalid 4 00000010 Sensor firmware Sensor firmware version invalid 5 00000020 Sensor EEPROM corrupt Sensor table value corrupt or out of order 6 00000040 Sensor unrecognized Unsupported sensor or bad configuration 7 00000080 Bad Initialization Meter failed to initialize or properly configure 8 00000100 Bad Zero Meter failed to properly zero 9 00000200 IPC failure Interprocessor communication failure

Command: none Query: SYSTem:FAULt?

Reply: <fault> System

As an example, if a probe is found but there is a general fault, the system fault query returns:

00000102 (Bad zero, probe damage temperature exceeded)

System Restore This command restores all user settings to the factory state.

Command: SYSTem:RESTore Query: none

System Sync This command resets the system measurement sync timer. This

query gets the system measurement sync timer value. The system measurement sync timer is a free-running timer that increments by ten for every 10 microseconds of elapsed time. This timer is used as the source for the time stamp value for all power-related measurements. T o counteract clock creep, send the system sync command at intervals not to exceed 10 minutes.

Command: SYSTem:SYNC Query: SYSTem:SYNC?

Reply: <current timer value>

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Communications

Host Interface

Message Handshaking

This command selects the state of SCPI message round trip handshaking.

Command: SYSTem:COMMunicate:HANDshaking {ON|OFF} Reply: OK if ON is selected; otherwise no reply is sent

Query: SYSTem:COMMunicate:HANDshaking? Reply: ON|OFF

If handshaking is ON:

• Empty commands (that is, commands with only whitespace

characters) reply with “OK\r\n”

• Valid commands with valid data reply with “OK\r\n”

• Valid queries with valid data reply as explicitly defined else-

where in this section, followed by “OK\r\n”

• Valid commands or queries which result in an error reply with

“ERR<n>\r\n” where <n> is the error code number (see “Error Record Reporting and Collection,” below)

• Unrecognized commands or queries reply with “ERR100\r\n”

• Error queuing occurs as explicitly defined elsewhere in this

section

Error Record Reporting and Collection

If handshaking is OFF:

• All command and query response behavior is explicitly

defined elsewhere in this section

Programming and system errors occasionally occur while testing or debugging remote programs and also during measurement. Error strings follow the SCPI Standard for error record definition:

<error code>,<quoted error string> The host queries for errors in two steps:

1. The host queries for the number of error records available (N).

2. The host queries N times for the error records. Errors are stacked up to 20 deep. In the case of error overflow, the

last error in the error list is an indication of error overflow. The possible error strings are shown in Table 5-5 (p. 5-10).

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Table 5-5. Error Codes and Description Strings

Error Code

Number

-350 “Queue overflow” Error queue is full

-310 “System error” Unexpected/unrecoverable hardware or software fault 0 “No error” No error

100 “Unrecognized command/query” The command or query is not recognized 101 “Invalid parameter” The command or query parameter is invalid 102 “Data error” A data error was encountered 200 “Execution Order” Command issued out of order 203 “Command Protected” Command is password protected 220 “Parameter Problem” Invalid parameter to otherwise valid command 241 “Device Unavailable” Cannot process command—probe is not present

Quoted Error String Error Description

Error -350 is raised when the error queue becomes full.

Non-“Queue overflow” errors are replaced by “Queue overflow” errors when there is exactly one available storage location available in the error queue. No additional errors are added to the error queue if the error queue is full.

Error -310 is raised when the meter firmware detects an unexpected or unrecoverable error. This error condition includes unrecoverable hardware faults.

Error 100 is raised when the meter receives an unrecognized command or query.

Error 101 is raised when the meter receives a command or query with one or more invalid data parameters.

Error 102 is raised when the device receives a command or query for which no valid data exists.

Error 200 is raised when the device receives a command or query that is out of expected order of execution.

Error 203 is raised when the device receives a command or query that is password protected.

Error 220 is raised when the device receives a command or query that contains invalid parameters, but the command is valid.

Error 241 is raised when the device receives a command or query that requires a probe to be present.

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Host Interface

Error Count Query This query gets the number of error records in the error queue at the

time of the query. Command: none Query: SYSTem:ERRor:COUNt?

Reply: <count of error records stored in integer format>

Error Query This query gets the next error record(s) in the error queue. More than

one error record can be queried using the optional <error record count> parameter, which must be an integer value. A single error record is returned if <error record count> is not specified. No reply is transmitted if there are no error records available.

As the meter transmits each error record:

• The error record is permanently removed from the error queue

• The queued error record count decrements by one

Command: none Query: SYSTem:ERRor:NEXT? [<error record count>]

Default is not applicable. Reply: <next available error record(s)>

All Error Query This query gets all error records in the error queue at the time of the

query . No reply is transmitted if there are no error records available. After the completion of the reply transmission:

• The error queue is empty

• The queued error record count is zero

Command: none Query: SYSTem:ERRor:ALL?

Reply: <all available error record(s)>

All Error Clear This command clears all error records in the error queue.

Command: SYSTem:ERRor:CLEar Query: none

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Measurement Setup and Control

Measurement Mode Select

Measurement Data Snapshot Mode Select

This command sets the instrument to a measurement mode of dBm, Watts, or Joules. dBm, Watts, and Joules modes refer to a normal sampling mode. Scope mode only applies to PM-Pro power probes.

dBm—ratio of power to 1 milliwatt Watts—derived unit of power defined as joules per second. Joules—derived unit of energy defined as the amount of work

required to produce one watt of power for one second. Command: CONFigure:MEASure:MODe {DBM|J|W}

Default is W (Watts) - J (Joules) for pyroelectric probes. Query: CONFigure:MEASure:MODe?

Reply: DBM|J|W Note: If a probe is unattached/re-attached, this command returns to

the default setting of Watts.

This command sets the instrument to acquire data in a burst or snapshot fashion. This command/query only applies to PowerMax-Pro probes.

Command: CONFigure:MEASure:SNAPshot:SELect {ON|OFF} Default is OFF.

Query: CONFigure:MEASure:SNAPshot:SEL? Reply: ON|OFF

Note: If no probe is attached, a value of OFF is returned. Err 100 is raised if fast channel is not selected. Err 200 is raised if CONFigure:MEASure:SOURce:SEL SLOW is selected.

Snapshot Pre-Trigger Buffer Size Select

This command sets the pre-trigger buffer size in samples. This specifies the number of pre-triggers to be displayed on output after a trigger event. This command/query only applies to PowerMax-Pro probes.

Command: CONFigure:MEASure:SNAPshot:PREbuffer <iSize> Default is 0.

Query: CONFigure:MEASure:SNAPshot:PREbuffer? Reply: <iSize >

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Host Interface

Measurement Data Acquisition Source Select

Measurement Data Acquisition Source List Query

This command sets the instrument to acquire data from either the slow or fast channel. Pyroelectric probes only use the F AST channel, whereas thermopile and optical probes only use the SLOW channel setting. PowerMax-Pro probes can use both channels, but not simultaneously.

Command: CONFigure:MEASure:SOURce:SELect {SLOW|FAST} Default is SLOW.

Query: CONFigure:MEASure:SOURce:SEL? Reply: SLOW|FAST

Note: A value of SLOW is returned if a probe is not attached.

This query returns a list of available source channel selections for the attached probe.

Command: none Query: CONFigure:MEASure:SOURce:LIST?

Reply: SLOW, FAST Note: A value of SLOW is returned if a probe is not attached.

Speedup This command sets the speedup state. The query gets the speedup

state. Command: CONFigure:SPEedup {ON|OFF}

Default is OFF Query: CONFigure:SPEedup?

Reply: {ON|OFF} Error 100 is raised if the sensor is an optical, or if fast channel is

selected.

Area Correction Enable/Disable State

This command enables/disables area correction. Command: CONFigure:AREA:CORRection {ON|OFF}

Default is OFF Query: CONFigure:AREA:CORRection?

Reply: ON|OFF

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Aperture Area

This command sets the aperture area, expressed in square centimeters (cm2).

Command: CONFigure:AREA:APERture {0.01..500.00} Default is 1.0

Query: CONFigure:AREA:APERture? Reply: 0.01..500.00

Analog Output Full Scale Voltage

Data Smoothing Enable smoothing to suppress large and rapid variations in the

This command selects the full scale output voltage at the analog output connector.

Command: CONFigure:AOUT:FSCale {1|2|4} Default is 2

Query: CONFigure:AOUT:FSCale? Reply: 1|2|4

output reading. Smoothing is implemented as a decimating average of 32:1 for thermopile, optical, and Pyroelectric probes.

The smoothing function can be used under the following conditions:

• A Pyroelectric probe is attached and Joules mode is selected

• A thermopile probe is attached and Watts mode is selected

• An optical probe is attached and Watts mode is selected

Time

This command sets the display data smoothing to either ON or OFF.

Wavelength Correction

Command: CONFigure:AVERage:TIME {OFF|ON} Default is OFF

Query: CONFigure:AVERage:TIME? Reply: OFF|ON

Enable/Disable State

This command enables/disables wavelength correction. Command: CONFigure:WAVElength:CORRection {OFF|ON}

Default is OFF Query: CONFigure:WAVElength:CORRection?

Reply: OFF|ON

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Host Interface

Operational Wavelength

This command sets the current wavelength, which is committed to persistent storage when it is changed. If the requested wavelength is greater than the upper wavelength limit, the current wavelength will be set to the upper wavelength limit. Likewise, if the requested wavelength is less than the lower wavelength limit, the current wavelength will be set to the lower wavelength limit. The minimum and maximum allowed wavelength can also be named as data arguments. The query gets the current, maximum allowed, or minimum allowed wavelengths, depending on the optional query data argument.

Command: CONFigure:WAVElength:WAVElength {MINimum|MAXimum| <requested wavelength in nm>}

Query: CONFigure:WAVElength:WAVElength? [MINimum|MAXimum] Reply: <granted wavelength in nm>

if [MINimum|MAXimum] is not specified

Reply: <allowed maximum wavelength in nm> if MAXimum is specified Reply: <allowed minimum wavelength in nm> if MINimum is specified

Query Probe Wavelength Table

This query gets the wavelength table entries from the probe. Each wavelength is expressed in units of nm, rounded to the nearest integer. Each wavelength ranges from 1 to 99999. Error 101 is raised if the list length exceeds 100 entries. Note that the list returned by the query always includes the calibration wavelength of the current probe. The list does not include the selected operational wavelength.

Command: none Query: CONFigure:WAVElength:LIST?

Reply: <comma separated list of wavelengths> Error 241 is raised if no probe is attached.

Gain Compensation Enable/Disable State

This command enables/disables gain compensation, which is committed to persistent storage when it is changed.

Command: CONFigure:GAIN:COMPensation {OFF|ON} Default is OFF

Query: CONFigure:GAIN:COMPensation? Reply: OFF|ON

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Factor

This command sets the gain compensation factor, which is committed to persistent storage when it is changed. The gain compensation factor has no units. Error 101 is raised if the gain compensation factor is less than 0.001 or greater than 100,000.0.

Command: CONFigure:GAIN:FACTor <0.001..100000.0> Default is 1.0

Query: CONFigure:GAIN:FACTor? Reply: <gain compensation factor>

Probe Zero This command sets the current measurement as the zero baseline

measurement. The meter cannot zero baseline the measurement when in Snapshot mode.

Command: CONFigure:ZERO Query: none

Pulsed Thermopile Joules Trigger Level

Pulse Detection Measurement Window

Err 200 is raised if the meter is in Snapshot mode. To correct: exit Snapshot mode, zero, and then re-enter Snapshot mode.

This command selects the Pulsed Thermopile Joules mode trigger sensitivity level.

Command: TRIGger:PTJ:LEVel {LOW|MEDium|HIGH} Default is LOW

Query: TRIGger:PTJ:LEVel? Reply: LOW|MEDIUM|HIGH

Note: This command only applies to thermopile or optical probes.

This command selects the pulse detection window size for Sampling Joules using the fast measurement channel. The input value is expressed in microseconds. Value range is 10, 100..1000000.

Command: CONFigure:MEASure:WINdow <10,100..1000000> Default is 10

Query: CONFigure:MEASure:WINdow? Reply: Pulse detection window size in microseconds

Note: This command only applies to PowerMax-Pro sensors.

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Host Interface

Sample Variable Decimation

This command sets the decimation rate for the fast data acquisition channel, which takes effect at the end of the current decimation cycle. The decimation rate units are expressed samples rounded to the nearest integer.

Measurement data is selected for processing, ranging as frequently as 1 sample processed per 1 measured to as infrequently as 1 sample processed per 99999 samples measured.

Command: CONFigure:DECimation {1..99999} Default is 1

Query: CONFigure:DECimation? Reply: 1..99999

Error 241 is raised if the sensor is not a pyroelectric or fast power sensor.

Range Select Range Value Select

This command selects the meter measurement range, expressed in the units defined under the current measurement mode (Joules or Watts). The measurement range is selected by expressing the maximum expected measurement, which must be greater than 0.0. The <granted full scale range> value is the lowest available full scale range that can measure the <maximum expected measurement>. For example, if the list of available ranges is 3 mW to 30 mW and the maximum expected measurement is 10 mW, the granted range will be 30 mW . The <granted full scale range> is the top range available if the <maximum expected measurement> exceeds the top range value.

Command: CONFigure:RANGe:SELect {<maximum expected measurement>|MAXimum|MINimum} Default is not applicable

Query: CONFigure:RANGe:SELect? [MAXimum||MINimum] Reply: <granted full scale range>

Using the optional MAX and MIN parameters on the command result in selecting the maximum or minimum available ranges, respectively. Using the optional MAX and MIN parameters on the query results in obtaining the maximum or minimum range full scale readings, respectively. The MIDdle range option only applies to pyroelectric probes.

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Auto Range Enable/Disable State

This command enables/disables automatic selection of the meter measurement range. The meter hunts for the best measurement range for the current probe and laser conditions when auto ranging is active. The hunt procedure can require several samples to arrive at the best range. Auto ranging applies only when a thermopyle or optical probe is attached.

Command: CONFigure:RANGe:AUTO {ON|OFF} Default is OFF

Query: CONFigure:RANGe:AUTO? Reply: ON|OFF

Note: Error 241 is raised if the sensor is pyroelectric or there is no probe attached.

Query Probe Range List

This query gets the range table entries from the probe. Each range is expressed in units of nm, rounded to the nearest integer . Each wavelength ranges from 1 to 99999. Note that the list returned by the query will always include the calibration wavelength of the current probe.

Command: none Query: CONFigure:RANGe:LIST?

Reply: <comma separated list of available ranges> Error 241 is raised if no probe is attached.

Data Item Select Data items that appear in a measurement data record are selectable.

The data argument is a comma-separated list that consists of one or more tokens shown in Table 5-6, below. At least one token must be specified. The tokens can be specified in any order.

Command: CONFigure:ITEMselect {PRI|QUAD|FLAG|SEQ|PER} Default is PRI

Query: CONFigure:ITEMselect? Reply: one or more of PRI|QUAD|FLAG|SEQ|PER

Table 5-6. Data Item Selections for Measurement Data Record

Tokens Data Description Result Expression in Data Record

PRI Primary data value (includes Watts or Joules) Scientific notation (for example, “2.88E-3”)

QUAD X, Y coordinate values for quad LM probes Scientific notation

FLAG Flags 16-bit hexadecimal integer form

SEQ Sequence ID 32-bit unsigned integer form PER Pulse period (expressed in µSec, Joules mode) 32-bit unsigned integer form

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Host Interface

Measurement Data Format

ASCII Data Record Format

By default, data records are sent to the host in ASCII text. A data record is a set of one or more comma-delimited data values generated at the same instant, ending in “<CR><LF>”.

The selected meter measurement mode controls the type of measurement data that is sent over the host interface. The user receives energy readings from the host interface if the measurement mode is “J”. The user receives power readings from the host interface if the measurement mode is “W”. Watts or Joules are expressed as units per square centimeter if area correction is active.

The following information is available with each data record:

• PRI (Measurement value in “%.3E” format when fast channel

is used and “%.5E” format for any other power probe type)

• QUAD (Measurement values in “%.2E, %.2E” format for the

X,Y coordinates when a quad LM sensor is connected.

• FLAG (Flags)—refer to Table 5-8 (p. 5-20)

• SEQ (Sequence number, formatted as a decimal integer)

• PER (Period value, expressed in decimal integer as microsec-

onds)

The meter internally generates a data record according to the following rules:

• With every pulse when a thermopile probe is attached and if

Joules mode is selected

• When a measurement sample is taken, a thermopile or optical

probe is attached, and Watts mode is selected

Since thermopile and optical power measurements are continuous in nature (not event-based as with pyroelectric probes), the delivery of this data can be configured as a stream of sampled points or simply the last point recorded.

The presentation of the data items in a data record are in PRI, QUAD- X, QUAD-Y, FLAG, SEQ, or PER order, depending on which tokens are specified (see the following table).

Table 5-7. Measurement Data Record Format, ASCII

Measurement Mode Measurement Record Format

Watts or long pulse Joules <PRI>,<FLAG>,<SEQ> Watts or long pulse Joules (quad LM sensors) <PRI>,<QUAD-X>,<QUAD-Y>,<FLAG>,<SEQ> Joules <PRI>,<FLAG>,<SEQ>,<PER>

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The FLAG data item can be used so that accompanying qualification information is reported with each data record. Qualification information includes various error conditions. The flag word is reported in the ASCII form of an 8-bit uppercase hexadecimal number. Each bit has a qualification meaning, as described in the following table.

Bit Position Hex Bit Mask Qualification Meaning

0 01 Trigger event 1 02 Baseline CLIP 2 04 Calculating (PTJ mode only) 3 08 Final energy record (PTJ mode only) 4 10 Over-range 5 20 Under-range 6 40 Measurement is sped up 7 80 Over -temperature error 8 100 Missed measurement 9 200 Missed pulse

xxx 000 No qualification exists

Table 5-8. FLAG Bit Definitions

Trigger Parameters Trigger Source

This command selects the trigger source. Trigger Source only applies to pyroelectric probes.

Command: TRIGger:SOURce {INTernal|EXTernal} Default is INTernal

Query: TRIGger:SOURce? Reply: INT|EXT

The trigger source setting have no effect on devices positioned as slaves in trigger bussed configurations. All slaves receive their triggers from the trigger bus.

Internal Trigger

Level This command sets the trigger level expressed as an absolute power

or energy value, depending on which measurement mode is selected. This command only applies to pyroelectric and fast power probes.

If a pyroelectric probe is attached, the minimum trigger level is

0.1 percent of full scale for the currently-selected range and the maximum trigger level is 30 percent of full scale for the currently

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Host Interface

selected range. All other probe types have a minimum trigger level of 0 (zero) and a maximum trigger level that is the maximum power rating of the probe.

To determine the minimum and maximum values of the probe, use the query TRIGger:LEVel? MIN and TRIGger:LEVel? MAX, respectively.

Command: TRIGger:LEVel {MINimum|MAXimum|0.1..maximum Range Value} Default is .1 Watts

Query: TRIGger:LEVel? {MINimum|MAXimum} Reply: 0.01..maxValue

Percent Level When a pyroelectric probe is attached, this command sets the trigger

level expressed as a percentage of full-scale capability in the selected range. Using this command for any other probe type sets the trigger level expressed as a percentage of the maximum power rating of the probe.

Command: TRIGger:PERcent:LEV el {DEFault| MINimum|MAXimum: 0.1..100.0} Default is 5

Query: TRIGger:PERcent:LEVel? {DEFault|MINimum|MAXimum} Reply: 0.1..100.0

The trigger level setting has no effect when external triggering is selected.

External Trigger

The external trigger settings have no effect when internal triggering is selected or on devices that are positioned as slaves in trigger bussed configurations. This command only applies to pyroelectric and fast power probes.

Edge Select This command selects the external trigger edge. The selected trigger

edge is the external trigger event. Command: TRIGger:SLOPe {POSitive|NEGative}

Default is POSitive Query: TRIGger:SLOPe?

Reply: POS|NEG

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Delay This command selects the external trigger delay time. The internal

trigger happens at the time marked by the external trigger delay time after the selected external trigger edge. The trigger delay time units are microseconds.

Command: TRIGger:DELay {0..1000} Default is 0

Query: TRIGger:DELay? Reply: 0..1000

Set Sequence ID

This command sets the sequence ID. It must be an integer value. The sequence ID is used for data synchronization of multiple meters

sharing the same trigger signal. Command: TRIGger:SEQuence {0..16777215}

Default is 0

Measurement Data Collection

Last Data Record Query

Query: none

Measurement data can be collected in two ways:

1. Receiving measurement data records from a continuous data stream.

2. Querying the last data record generated

The host has control over when measurement data is transmitted. Transmission is enabled after a STARt command. Transmission is disabled after a STOP command. All measurement data records are transmitted immediately as they are generated while transmission is enabled.

This query gets the last recorded measurement at the time of the query. There is no reply transmitted if no measurement has been recorded.

Command: none Query: READ?

Reply: <last measurement record> The last measurement record is composed of comma-delimited data

items generated at the same instant if in ASCII mode, or a packet of binary data of a fixed length. Data items presented, including a flags item, will vary depending on the measurement and statistics modes and the data items selected. Refer to Table 5-7 (p. 5-19).

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Data Gating Start Command

This command enables data streaming for a continuous or fixed length transmission. An optional number of samples between 0 and 2^32 -1 can be selected. In Snapshot mode, the maximum number of requested samples can be 240,000. A value of zero is equivalent to infinity . This command is ignored if data streaming transmission has already started.

Command: STARt <optional number of requested samples> Query: none

Stop Command

This command disables data streaming interface transmission and is ignored if data streaming interface transmission is already disabled.

Command: STOP Query: none

Host Interface

Force Trigger Command

This command forces a data transmission when in Snapshot mode. This command does not respond with an ‘OK’ if handshaking is enabled but will, instead, transmit data.

Command: FORCe Query: none Note: An ERR-200 is raised if the command is sent outside of Snap-

shot mode and no STARt command has been issued.

Meter and Probe Device

The sensor can be queried for unit identification and quality control information.

Information

Meter Serial Number

This query gets the meter serial number. The query is always available. Restrict the serial number string to no more than 20 characters (white space is not allowed).

Command: none Query: SYSTem:INFormation:INSTrument:SNUMber?

Reply: <quoted meter serial number>

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Part Number

This query gets the part number and is always available. Restrict the part number string to no more than 20 characters.

Command: none Query: SYSTem:INFormation:INSTrument:PNUMber?

Reply: <quoted part number>

Model Name

This query gets the model name and is always available. Restrict the model name to no more than 20 characters.

Command: none Query: SYSTem:INFormation:INSTrument:MODel?

Reply: <quoted model name>

Calibration Date

This query gets the calibration date and is always available. Restrict the date string to no more than 20 characters.

Command: none Query: SYSTem:INFormation:INSTrument:CDATe?

Reply: <quoted calibration date>

Manufacturing Date

This query gets the manufacturing date and is always available. Restrict the date string to no more than 20 characters.

Command: none Query: SYSTem:INFormation:INSTrument:MDATe?

Reply: <quoted calibration date>

Meter Type

This query returns the meter type as TOP or TO. TOP means the meter supports Thermopile, Optical, and Pyroelectric detectors (probes). TO meters only support Thermopile and Optical detectors (probes).

Command: none Query: SYSTem:INFormation:INSTrument:TYPE?

Reply: TOP|TO

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Firmware Version

This query returns the firmware version of the meter. Command: none Query: SYSTem:INFormation:INSTrument:FVER?

Reply: <firmware version>

FPGA Hardware Version

This query returns the hardware version of the FPGA in the meter. Command: none Query: SYSTem:INFormation:FPGA:HVER?

Reply: <hardware version>

FPGA Firmware Version

This query returns the firmware version of the FPGA in the meter. Command: none Query: SYSTem:INFormation:FPGA:FVER?

Reply: <hardware version>

Probe Type

This query gets the currently-connected probe type. Command: none Query: SYSTem:INFormation:PROBe:TYPE?

Reply: <type>,<qualifier> <type> = NONE, THERMO, PYRO, or OPT <qualifier> = NONE, SINGLE, QUAD, or NOSPEC NONE,NONE is returned when there is no valid probe attached.

THERMO,QUAD or THERMO,SINGLE is returned when a valid thermopile probe is attached. PYRO,NOSPEC is returned when a valid pyroelectric probe is attached. OPT ,NOSPEC is returned when a valid optical probe is attached.

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Model

This query gets the currently-connected probe model. Command: none Query: SYSTem:INFormation:PROBe:MODel?

Reply: <probe model string> The probe model string is the name string of the attached probe and

is the generic name of the attached probe if the string does not exist. The reply string is not quoted.

The following naming rules apply (in the order listed):

1. An empty string, if a valid probe is not attached

2. The probe model string stored within the probe EEPROM, if a

3. “LM” if a valid LM style probe is attached and a probe model

probe model string exists

string does not exist

4. “PM” if a valid PM style probe is attached and a probe model string does not exist

5. “Unknown” in all other cases

Serial Number

This query gets the serial number of the probe. Command: none Query: SYSTem:INFormation:PROBe:SNUMber?

Reply: <probe serial number> An empty string is returned if a valid probe is not attached.

Responsivity

This query gets the currently-connected probe calibration responsivity. Responsivity units depend on the probe type.

Command: none Query: SYSTem:INFormation:PROBe:RESPonsivity?

Reply: <responsivity>

0.0 is returned if a valid probe is not attached.

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Calibration Date

This query gets the calibration date of the probe. Command: none Query: SYSTem:INFormation:PROBe:CDATe?

Reply: <probe calibration date> The date is expressed using the ASCII string format of “<3 character

month name> <day of the month> <year>”. An empty string is returned if a valid probe is not attached.

Head Temperature

This query gets the head temperature of the probe. Command: none Query: SYSTem:INFormation:PROBe:TEMPerature?

Reply: <probe head temperature in degrees Celsius in integer format>

The literal string “NA” (quotes not included) is returned if a valid probe is not attached or the attached probe does not have a temperature measurement device.

Diameter

This query gets the probe diameter. Command: none Query: SYSTem:INFormation:PROBe:DIAMeter?

Reply: <probe diameter in mm> The literal string “NA” (quotes not included) is returned if a valid

probe is not attached or the attached probe diameter value is not known.

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Persistent Parameters

Table 5-9. Persistent Parameters

Parameter Description Data Argument Range Factory Value

a. PC host software settings will overwrite persistent parameters.

Host Interface Glossary

Factory settings - Persistent settings typically set by the manufacturer. These settings are parameters whose access is restricted by password. Factory settings do not include operational parameters.

Ignored command /query - A defined response for commands or queries in which no internal or external action is taken and the command or query is dropped. The meter responds to ignored commands/queries as if the command/query was never sent.

Message - The transmission of a properly-terminated string from host to sensor or from sensor to host.

Over-range error - A measurement error condition in which the measurement exceeds the measurement capability of the device.

Over-temperatur e error - A measurement error condition in which the temperature of the sensor exceeds the over-temperature setting.

Reset cycle - The reception of a reset command or the action of disconnecting power and then reconnecting power to the sensor. Either event sets all non-persistent operational parameters to their default settings.

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Calibration and Warranty

SECTION SIX: CALIBRATION AND W ARRANTY

In this section:

• Calibration (this page)

• Coherent calibration facilities and capabilities (this page)

• Limited warranty (page 6-2)

• Extended warranty (page 6-2)

• Warranty limitations (page 6-3)

• Obtaining service (page 6-3)

• Product shipping instructions (page 6-4)

Calibration

Coherent Calibration Facilities and Capabilities

Coherent laser power and energy meters are precision instruments, capable of delivering very accurate measurements, as well as providing many years of useful service. To maintain this high level of performance, it is important to have your measurement system serviced and recalibrated once a year.

As the largest laser manufacturer in the world, Coherent has been able to build state-of-the-art calibration facilities containing the widest possible range of laser types and technologies. This enables us to perform instrument and sensor calibration under virtually any combination of wavelength, power, and operating characteristics. Sensors are calibrated against NIST-traceable working standard sensors which are, in turn, calibrated against NIST -calibrated golden standard sensors. These working and golden standards are maintained with the utmost care, recalibrated annually, and verified even more regularly. We maintain multiple NIST-calibrated standards at many laser wavelengths to support the growing calibration needs of our customers. Optical calibration is a core competency at Coherent and we strive to continually improve our methods, precision, and repeatability. Additionally, most of the calibrations are performed with highly automated systems, thus reducing the possibility of human error to nearly zero. Strict quality inspections during many stages of calibration and testing assure a precise and accurate instrument that is NIST traceable and CE marked. The benefit to our customers is that instruments calibrated by Coherent will consis-

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tently perform as expected under their actual use conditions. We are a registered ISO 9001:2000 company, our products are NIST traceable, and our calibration labs are fully ANSI Z540 compliant.

In addition to the technological advantage, we also strive to deliver the best service in the industry , with a knowledgeable and responsive staff, and rapid turnaround.

Limited Warranty

Extended Warranty

Coherent, Inc. (the “Company”) warrants its laser power and energy meters and sensors products (“Products”) to the original purchaser (the “Customer”) that the product is free from defects in materials and workmanship and complies with all specifications, active at the time of purchase, for a period of twelve (12) months.

Coherent, Inc. will, at its option, repair or replace any product or component found to be defective during the warranty period. This warranty applies only to the original purchaser and is not transferable.

Coherent, Inc. (the “Company”) offers original purchasers (the “Customer”) purchasing laser power and energy meters and sensors products (“Products”) an extended twelve (12) month warranty program, which includes all parts and labor. In order to qualify for this warranty, a Customer must return the Product to the Company for recalibration and recertification. The Company will re-certify the Product, provide software upgrades, and perform any needed repairs, and recalibrate the Product, for a fixed service fee (as established by the Company from time to time and in effect at the time of service). If the product cannot be re-certified due to damage beyond repair, parts obsolescence, or other reasons, the Customer may be informed that an Extended W arranty program is not available for the Product.

If the Product fails and is returned to the Company within one year following the date of recalibration and recertification service, the Company will, at its option, repair or replace the Product or any component found to be defective. If the Product must be replaced and the Product is no longer available for sale, Coherent reserves the right to replace with an equivalent or better Product. This warranty applies only to the original purchaser and is not transferable.

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Calibration and Warranty

Warranty Limitations

The foregoing warranties shall not apply, and Coherent reserves the right to refuse warranty service, should malfunction or failure result from:

• Damage caused by improper installation, handling or use.

• Laser damage (including sensor elements damaged beyond

repair).

• Failure to follow recommended maintenance procedures.

• Unauthorized product modification or repair.

• Operation outside the environmental specifications of the

product.

Coherent assumes no liability for Customer-supplied material returned with Products for warranty service or recalibration.

THIS WARRANTY IS EXCLUSIVE IN LIEU OF ALL OTHER WARRANTIES WHETHER WRITTEN, ORAL, OR IMPLIED. COHERENT SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE COMPANY BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH ITS PRODUCTS.

Obtaining Service

In order to obtain service under this warranty , Customer must notify the Company of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. The Company shall, in its sole discretion, determine whether to perform warranty service at the Customer's facility , at the Company's facility or at an authorized repair station.

If Customer is directed by the Company to ship the product to the Company or a repair station, Customer shall package the product (to protect from damage during shipping) and ship it to the address specified by the Company , shipping prepaid. The customer shall pay the cost of shipping the Product back to the Customer in conjunction with recalibration and recertification; the Company shall pay the cost of shipping the Product back to the Customer in conjunction with product failures within the first twelve months of time of sale or during an extended twelve month warranty period.

A Returned Material Authorization number (RMA) assigned by the Company must be included on the outside of all shipping packages and containers. Items returned without an RMA number are subject to return to the sender.

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For the latest Customer Service information, refer to our website:

www.Coherent.com.

Detailed instructions on how to prepare a product for shipping are given under Product Shipping Instructions, below.

Table 6-1. Coherent Service Centers

Location Phone Fax E-mail

USA 1.800.343.4912 503.454.5777 [email protected]

Europe +49-6071-968-0 +49-6071-968-499 [email protected]

International 503.454.5700 503.454.5777 [email protected]

Product Shipping Instructions

To prepare the product for shipping to Coherent:

1. Contact Coherent Customer Service (refer to T able 6-1, above) for a Return Material Authorization number.

2. Attach a tag to the product that includes the name and address of the owner, the person to contact, the serial number, and the RMA number you received from Coherent Customer Service.

3. Wrap the product with polyethylene sheeting or equivalent material.

4. If the original packing material and carton are not available, obtain a corrugated cardboard shipping carton with inside dimensions that are at least 6 in. (15 cm) taller, wider, and deeper than the product. The shipping carton must be constructed of cardboard with a minimum of 375 lb. (170 kg) test strength. Cushion the instrument in the shipping carton with packing material or urethane foam on all sides between the carton and the product. Allow 3 in. (7.5 cm) on all sides, top, and bottom.

5. Seat the shipping carton with shipping tape or an industrial stapler.

6. Ship the product to: Coherent, Inc.

27650 SW 95th Ave. Wilsonville, OR 97070 Attn: RMA # (add the RMA number you received from

Coherent Customer Service)

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APPENDIX A: SPECIFICATIONS

Specifications

Meter Specifications

This appendix lists specifications for the LabMax-Pro SSIM Laser Power Meter.

Table A-1. Specifications (Sheet 1 of 2)

Parameter Description

Measurement Resolution (%) (full-scale)

at 10 Hz speed at 20 kHz high-speed

Sensor Compatibility PM Model Thermopile, PowerMax-Pro, LM Model Thermopile,

Measurement Range Sensor dependent (reference sensor specifications) Accuracy (%)

Digital Meter System

Analog Output Calibration Uncertainty (%) (k = 2) ± 1 Power Sampling Rate

Thermopile (Hz)

PowerMax-Pro - Standard-Speed (Hz)

PowerMax-Pro - High-Speed (Hz)

PowerMax-Pro - Snapshot Mode (kHz)

Pyroelectric (Hz)

LM-2/OP-2 Optical (Hz) Analog Output (VDC) 0 to 1, 2, or 4V (selectable) Analog Output Resolution (mV) 1 Analog Output Update Rate (kHz) 19 Measurement Analysis

Computer Interface USB and RS-232 Pulse Triggering Internal and External Temperature

Operating Range

Storage Range Instrument Power (external supply) 90 to 260 VAC, 50/60 Hz Compliance CE, RoHS, WEEE Dimensions 105 x 105 x 32 mm (4.1 x 4.1 x 1.3 in.) Weight 0.3 kg (0.6 lb.)

0.1

0.2

OP-2 & LM-2 Optical, and DB25 EnergyMax pyroelectric

± 1 Meter + sensor ± 1

10 10 20 kHz 625 10000 10

Trending, tuning, histog ram, data logging, statistics (min., max., mean, range, std. dev., dose, stability), pulse shape and pulse energy (with PowerMax-Pro in High-Speed and Snapshot mode), beam position with LM Model thermopiles

5 to 40°C (41 to 104°F)

-20 to 70°C (-68 to 158°F)

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Table A-1. Specifications (Sheet 2 of 2)

Parameter Description

Front Panel Power switch

USB high-speed port (mini-B connector) Trigger output (SMB connector) Analog output (SMB connector) RS-232 port (DB-9F connector)

Rear Panel DB-25 sensor port

External trigger input (SMB connector, 3 to 5 Vin, 2 to 10 mA,

50 ohm AC, 300 ohm DC impedance)

Power jack (12 VDC - center positive)

Part Number

a. Meter supplied with AC power adapter, power cord, USB cable, trigger cable, software and driver CD, and cer-

tificate of calibration.

1268881

Persistent Parameters

Refer to “Persistent Parameters” (p. 5-28).

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Errors

APPENDIX B: ERRORS

Meter and Sensor Errors

Table B-1. Meter and Sensor Errors

Displayed Message Cause Corrective Action

AnnounceFaultsWindow One or more system faults have been

reported

Confirm Buffer Clear Trying to change the buffer size when

the buffer contains unsaved data

Hardware Incompatibility Error

Standard Mode vs. Snapshot Mode Conflict

Meter Reports Missing Data Data samples from the meter were

Meter’s User Settings Restored to Default

Meter was disconnected Meter is not connected Connect the meter to the sensor and the PC No Com Port Selected Com port not selected Select Com port Snapshot Mode Setting

Conflict

Unable to launch Updater Program

Unable to Open Meter on COM1

Unexpected Error Encounter Unexpected error condition Reference the specific corrective action

Software is connected to a meter that has obsolete firmware or hardware

De-selecting High-Speed mode in the Home tab while Snapshot mode is enabled in the Data Buffer tab.

marked with the Missing Data flag Factory defaults are being overwritten

with non-factory default user settings.

Not all requirements have been met for entering Snapshot mode

Software is unable to find the updater application when you press the Check for Updates button

Port not connected to a meter or another application is using the port

Reference the specific corrective action shown next to the error in the error message

Click OK to discard the data or Cancel to preserve the data

Install newer firmware or software, or install older software that is compatible

Press Yes to disable Snapshot mode and change to Standard mode, or press No to remain in High-Speed and Snapshot mode

None—missing data is not recoverable

Unplug the meter from the computer before restoring the factory defaults.

Click Confirm Changes to make necessary setting adjustment and enable Snapshot mode, or click Cancel Request to leave all settings unchanged

Reinstall the software.

Select an available Com port

shown next to the error in the error message—unrecoverable errors require you to exit the application

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INDEX

Index

Analog output 4-4 Applying wavelength compensation accuracy 3-8

Calibration 6-1 Coherent calibration facilities and capabilities 6-1 Commands and queries 5-6 Communications 5-9 Compatibility, sensor 4-2 Compliance

Export control laws ix RoHS ix

Conformity, declaration of 1-2

Declaration of conformity 1-2 Description, sensor technology 3-6

Errors

Meter and sensor B-1

Record reporting and collection 5-9 Export control laws compliance ix Extended warranty 6-2 External

Trigger input 4-2

Trigger output 4-4

Features

LabMax-Pro PC software 3-5

Product 3-4 Firmware, updates ix

Glossary, host interface 5-28

Hardware 4-1

Analog output 4-4

External trigger input 4-2

External trigger output 4-4

Power supply 4-2

Sensor compatibility 4-2

USB/RS-232 4-2 High-Speed mode 3-2 Host command quick reference 5-3 Host interface

Commands and queries 5-6

Communications 5-9

Error record reporting and collection 5-9 Measurement setup and control 5-12 SCPI common commands 5-6

System options 5-7 Glossary 5-28 Host command quick reference 5-3 Measurement, Data collection 5-22 Meter and probe device information 5-23 Persistent parameters 5-28, A-2 RS-232 interface, using 5-2 Special considerations 5-1

Message terminators 5-1

Syntax and notation conventions 5-2

Using the RS-232 interface 5-2

Using the USB interface 5-2 Syntax and notation conventions 5-2 USB interface, using 5-2

Initial setup instructions 2-1 Input, external trigger 4-2 Installation, software 2-1 Instructions

Initial setup 2-1 Product shipping 6-4

LabMax-Pro PC software features 3-5 Limitations, warranty 6-3 Limited warranty 6-2

Measurement

Data collection 5-22 High-Speed 2-6 Setup and control 5-12 Snapshot 2-9 Standard Speed 2-3

Meter

and probe device information 5-23 and sensor errors B-1 Specifications A-1

Mode

High-Speed 3-2 Snapshot 3-3 Standard-Speed 3-2

Obtaining service 6-3 Operating mode overview 3-2

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High-Speed 3-2 Snapshot 3-3 Standard-Speed 3-2

Operation

Hardware 4-1

Output

Analog 4-4 External trigger 4-4

Overview, operating mode 3-2

Parameters, persistent A-2 Persistent parameters 5-28, A-2 Power supply 4-2 PowerMax-Pro sensors 3-7 Preface ix Product

Compliance

Export control laws ix

RoHS ix Features 3-4 Shipping instructions 6-4 Specifications A-1

Publication updates ix

Quick

Reference, host command 5-3

Quick start

High-Speed measurement 2-6 Snapshot measurement 3-3 Standard-Speed measurement 2-3

RoHS compliance ix RS-232, using 5-2

Safety 1-1

Declaration of conformity 1-2 Signal words and symbols in this manual vi i Waste electrical and electronic equipment (WEEE,

2002) 1-2 SCPI common commands 5-6 Sensor

Compatibility 4-2

Technology description 3-6

PowerMax-Pro sensors 3-7

Thermopile sensors 3-6 Sensors, PowerMax-Pro 3-7 Service, obtaining 6-3 Signal words and symbols in this manual vii

Signal words vii

Symbols viii Snapshot mode 3-3 Software installation 2-1 Specifications A-1

Meter A-1

Persistent parameters A-2 Standard-Speed mode 3-2 Supply, power 4-2 Syntax and notation conventions 5-2 System options 5-7

Taking

High-Speed measurements 2-6

Snapshot measurements 2-9

Standard-Speed measurements 2-3 Trigger

External circuit 4-4

Updates

Firmware ix

Publication ix USB/RS-232 4-2 Using

RS-232 interface 5-2

USB interface 5-2

Warranty

Extended 6-2

Limitations 6-3

Limited 6-2 Waste electrical and electronic equipment (WEEE,

2002) 1-2

Wavelength compensation accuracy 3-8

Applying 3-8

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