Newport 6100 User Manual

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Page 1

Model 6100

Laser Diode and Temperature Controller

User’s Manual

Page 2

ii Preface

Page 3

Preface iii

EU Declaration of Conformity

We declare that the accompanying product, identified with the mark, complies with requirements of the Electromagnetic Compatibility Directive, 2004/108/EC and the Low Voltage Directive 2006/95/EC.

Model Number: 6100

Year mark affixed: 2013

Type of Equipment: Electrical equipment for measurement, control and

laboratory use in industrial locations.

Manufacturer: Newport Corporation

1791 Deere Avenue Irvine, CA 92606

Standards Applied:

Compliance was demonstrated to the following standards to the extent applicable:

BS EN61326-1: 2006 “Electrical equipment for measurement, control and laboratory use – EMC requirements”.

BS EN 61010-1:2010 “Safety requirements for electrical equipment for measurement, control and laboratory use”.

Todd McFarland Senior Electrical Engineer 31950 E. Frontage Rd Bozeman, MT, USA

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iv Preface

Warranty

Newport Corporation warrants that this product will be free from defects in material and workmanship and will comply with Newport’s published specifications at the time of sale for a period of one year from date of shipment. If found to be defective during the warranty period, the product will either be repaired or replaced at Newport's option.

To exercise this warranty, write or call your local Newport office or representative, or contact Newport headquarters in Irvine, California. You will be given prompt assistance and return instructions. Send the product, freight prepaid, to the indicated service facility. Repairs will be made and the instrument returned freight prepaid. Repaired products are warranted for the remainder of the original warranty period or 90 days, whichever first occurs.

Limitation of Warranty

The above warranties do not apply to products which have been repaired or modified without Newport’s written approval, or products subjected to unusual physical, thermal or electrical stress, improper installation, misuse, abuse, accident or negligence in use, storage, transportation or handling. This warranty also does not apply to fuses, batteries, or damage from battery leakage.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS.

First printing 2009

This manual has been provided for information only and product specifications are subject to change without notice. Any change will be reflected in future printings.

Newport Corporation 1791 Deere Avenue Irvine, CA, 92606 USA

Part No. 90032866 REV D June 2018

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Preface v

Confidentiality & Proprietary Rights

Reservation of Title:

The Newport programs and all materials furnished or produced in connection with them ("Related Materials") contain trade secrets of Newport and are for use only in the manner expressly permitted. Newport claims and reserves all rights and benefits afforded under law in the Programs provided by Newport Corporation.

Newport shall retain full ownership of Intellectual Property Rights in and to all development, process, align or assembly technologies developed and other derivative work that may be developed by Newport. Customer shall not challenge, or cause any third party to challenge the rights of Newport.

Preservation of Secrecy and Confidentiality and Restrictions to Access:

Customer shall protect the Newport Programs and Related Materials as trade secrets of Newport, and shall devote its best efforts to ensure that all its personnel protect the Newport Programs as trade secrets of Newport Corporation. Customer shall not at any time disclose Newport's trade secrets to any other person, firm, organization, or employee that does not need (consistent with Customer's right of use hereunder) to obtain access to the Newport Programs and Related Materials. These restrictions shall not apply to information (1) generally known to the public or obtainable from public sources; (2) readily apparent from the keyboard operations, visual display, or output reports of the Programs; 3) previously in the possession of Customer or subsequently developed or acquired without reliance on the Newport Programs; or (4) approved by Newport for release without restriction.

Trademarks

The Newport logo is a registered trademark of Newport Corporation in Austria, Barbados, Benelux, Canada, the People’s Republic of China, Denmark, France, Germany, Great Britain, Ireland, Japan, the Republic of Korea, Spain, Sweden, and the United States. Newport is a registered trademark of Newport Corporation in Austria, Barbados, Benelux, the People’s Republic of China, Denmark, France, Germany, Ireland, Japan, the Republic of Korea, Spain, and Sweden.

Service Information

This section contains information regarding factory service for the source. The user should not attempt any maintenance or service of the system or optional equipment beyond the procedures outlined in this manual. Any problem that cannot be resolved should be referred to Newport Corporation.

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vi Preface

Technical Support Contacts

Newport Corporation Service Dept.

1791 Deere Ave. Irvine, CA 92606 Telephone: (949) 253-1694 Telephone: (800) 222-6440 x31694

Newport Opto-Electronics Technolo

中国上海市爱都路 253号第3号楼 3层 C部位, 邮编 200131

253 Aidu Road, Bld #3, Flr 3, Sec C, Shanghai 200131, China

Telephone: +86-21-5046 2300 Fax: +86-21-5046 2323

North America & Asia Europe

Newport/MICRO-CONTROLE S.A. Zone Industrielle 45340 Beaune la Rolande, FRANCE Telephone: (33) 02 38 40 51 56

Asia

gies

Newport Corporation Calling Procedure

If there are any defects in material or workmanship or a failure to meet specifications, promptly notify Newport's Returns Department by calling 1-800-2226440 or by visiting our website at www.newport.com/returns within the warranty period to obtain a Return Material Authorization Number (RMA#). Return the product to Newport Corporation, freight prepaid, clearly marked with the RMA# and we will either repair or replace it at our discretion. Newport is not responsible for damage occurring in transit and is not obligated to accept products returned without an RMA#.

E-mail: rma.service@newport.com

When calling Newport Corporation, please provide the customer care representative with the following information:

 Your Contact Information  Serial number or original order number  Description of problem (i.e., hardware or software)

To help our T the following conditions:

echnical Support Representatives diagnose your problem, please note

 Is the system used for manufacturing or research and development?  What was the state of the system right before the problem?  Have you seen this problem before? If so, how often?  Can the system continue to operate with this problem? Or is the system non-

operational?

 Can you identify anything that was different before this problem occurred?

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Preface vii

Table of Contents

EU Declaration of Conformity .............................................................. iii

Warranty ................................................................................................ iv

Technical Support Contacts .................................................................. vi

Table of Contents ................................................................................. vii

List of Figures ....................................................................................... xi

List of Tables ....................................................................................... xii

1 Safety Precautions 13

1.1 Definitions and Symbols ............................................................ 13

1.1.1 General Warning or Caution ...........................................13

1.1.2 Electric Shock ..................................................................13

1.1.3 European Union CE Mark ...............................................14

1.1.4 Alternating voltage symbol .............................................14

1.1.5 On ....................................................................................14

1.1.6 Off ....................................................................................14

1.1.7 Fuses ................................................................................15

1.1.8 USB .................................................................................15

1.1.9 Frame or Chassis .............................................................15

1.1.10 Waste Electrical and Electronic Equipment (WEEE) .....15

1.1.11 Control of Hazardous Substances ....................................16

1.2 Warnings and Cautions ............................................................... 16

1.2.1 General Warnings ............................................................16

1.2.2 General Cautions .............................................................17

1.2.3 Summary of Warnings and Cautions ...............................18

1.3 Location of Labels and Warnings ............................................... 19

1.3.1 Rear Panel ........................................................................19

2 General Information 21

2.1 Introduction ................................................................................ 21

2.1.1 Laser Diode Driver Subsystem ........................................21

2.1.2 Temperature Controller Subsystem .................................22

2.1.3 Instrument Features .........................................................22

2.2 Input Power ................................................................................ 23

2.3 Available Options and Accessories ............................................ 23

2.4 Specifications ............................................................................. 24

2.4.1 Laser Diode Driver ..........................................................24

2.4.2 Temperature Controller ...................................................27

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viii Preface

2.4.3 General Subsystem ..........................................................29

3 Getting Started 31

3.1 Unpacking and Handling ............................................................ 31

3.2 Inspection for Damage ............................................................... 31

3.3 Parts List ..................................................................................... 32

3.4 Choosing and Preparing a Suitable Work Surface ..................... 32

3.5 Electrical Requirements .............................................................. 32

3.6 Power Supplies ........................................................................... 33

4 System Operation 35

4.1 General Features ......................................................................... 35

4.1.1 Laser Diode Driver Features ...........................................35

4.1.2 Temperature Controller Features .....................................36

4.2 Safety Features ........................................................................... 37

4.2.1 Conditions Which Will Automatically Shut OFF the

Laser Diode Output .........................................................38

4.2.2 Conditions Which Will Automatically Shut OFF the TEC

Output ..............................................................................38

4.2.3 Power Line Surge Protection ...........................................38

4.3 Front Panel .................................................................................. 39

4.3.1 Key Switch ......................................................................39

4.3.2 LASER DIODE OUTPUT ON Switch and Indicator .....40

4.3.3 LASER DIODE ERROR Indicator LED ........................40

4.3.4 LASER DIODE LIMIT Indicator LED ...........................40

4.3.5 LASER DIODE Display Section .....................................41

4.3.6 TEC OUTPUT ON Switch and Indicator ........................41

4.3.7 TEC ERROR Indicator LED ...........................................41

4.3.8 TEC LIMIT Indicator LED .............................................42

4.3.9 TEC Status LEDs ............................................................42

4.3.10 TEC DISPLAY Section ...................................................42

4.4 Menu Section .............................................................................. 43

4.4.1 Control Knob ...................................................................43

4.4.2 Setup / Enter ....................................................................43

4.4.3 Esc ...................................................................................43

4.4.4 Cursor Arrow Keys ..........................................................44

4.4.5 Display Elements .............................................................44

4.4.6 Menu Selection ................................................................44

4.4.7 Title Screen ......................................................................45

4.4.8 Measurement Screen .......................................................45

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Preface ix

4.4.9 Setup Screens ...................................................................49

4.5 Rear Panel ................................................................................... 62

4.5.1 USB Interface ..................................................................63

4.5.2 Chassis GND ...................................................................63

4.5.3 AC Power Cord ...............................................................63

4.5.4 Fuses ................................................................................63

4.5.5 TEC Output Connector ....................................................64

4.5.6 Laser Diode Output Connector ........................................65

4.5.7 I/O Signals Connector .....................................................66

4.6 Signals I/O .................................................................................. 67

4.6.1 Fault .................................................................................67

4.6.2 TTL Input ........................................................................67

4.6.3 TTL Output ......................................................................68

4.6.4 LDD Current Monitor Output / Current Monitor Output

(Return) ............................................................................68

4.6.5 LDD Voltage Monitor Output / Voltage Monitor Output

(Return) ............................................................................68

4.6.6 LD Cathode Sense / LD Anode Sense .............................68

4.6.7 Analog Input / Analog Input (Return) .............................69

4.6.8 Chassis Ground ................................................................69

5 Computer Interfacing 71

5.1 General Guidelines ..................................................................... 71

5.2 Computer Interface Terminology ............................................... 71

5.2.1 <…> Delimiting Punctuation ..........................................71

5.2.2 <CR> Carriage Return .....................................................71

5.2.3 <LF> Line Feed ...............................................................71

5.2.4 (;) Semicolons ..................................................................71

5.2.5 Command Termination ....................................................72

5.2.6 Response Termination .....................................................72

5.3 Controller Operation Mode ........................................................ 72

5.4 USB Communication .................................................................. 72

5.5 Commands and Queries .............................................................. 73

6 Principles of Operation 117

6.1 Introduction .............................................................................. 117

6.2 TEC and Laser Diode Handling Precautions ............................ 117

6.3 TEC Controller Operation ........................................................ 119

6.3.1 Thermistor and Thermistor Current Selection ...............119

6.3.2 AD590 and LM335 ........................................................123

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x Preface

6.3.3 RTD Sensors ..................................................................127

6.4 Laser Diode Driver Operation .................................................. 128

6.4.1 Operating Modes ...........................................................128

6.4.2 Control Modes ...............................................................129

6.5 TTL Output Modes ................................................................... 130

6.5.1 LOW TTL Mode ...........................................................130

6.5.2 HIGH TTL Mode ..........................................................130

6.5.3 ENABLE OUTPUT MONITOR TTL Mode ................130

6.5.4 PULSE MONITOR TTL Mode .....................................131

6.5.5 TTL INPUT MONITOR TTL Mode .............................131

6.6 LIV Characterization ................................................................ 131

7 Tips and Techniques 134

7.1 Introduction .............................................................................. 134

7.2 TEC Limits ............................................................................... 134

7.2.1 Current Limit .................................................................134

7.2.2 Voltage Limit .................................................................134

7.2.3 Operating at or Near Io and Vte Limits .........................134

7.3 Grounding a TEC ..................................................................... 135

7.4 Laser Limits .............................................................................. 135

7.4.1 Current Limit .................................................................135

7.4.2 Voltage Limit .................................................................136

7.4.3 Operating at or Near Io and Vcomp Limits ...................136

7.5 External LD Analog Control .................................................... 136

7.5.1 Using the LD Analog Control Input as the Set Point ....136

7.5.2 Grounding Considerations when using the LD Analog

Control Input .................................................................136

7.6 Grounding a Laser Diode ......................................................... 137

7.7 Vf Measurements ...................................................................... 137

8 Maintenance and Service 138

8.1 Enclosure Cleaning ................................................................... 138

8.2 Obtaining Service ..................................................................... 138

8.3 Service Form ............................................................................ 139

9 Appendix A – Error Messages 141

9.1 Introduction .............................................................................. 141

9.2 Error Description ...................................................................... 141

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Preface xi

List of Figures

Figure 1 General Warning or Caution Symbol .............................................. 13

Figure 2 Electrical Shock Symbol ................................................................. 13

Figure 3 CE Mark .......................................................................................... 14

Figure 4 Alternating Voltage Symbol ............................................................ 14

Figure 5 On Symbol ....................................................................................... 14

Figure 6 Off Symbol ...................................................................................... 14

Figure 7 Fuse Symbol .................................................................................... 15

Figure 8 USB Symbol .................................................................................... 15

Figure 9 Frame or Chassis Terminal Symbol ................................................ 15

Figure 10 WEEE Directive Symbol ................................................................. 15

Figure 11 RoHS Compliant Symbol ................................................................ 16

Figure 12 Rear Panel Labels and Warnings ..................................................... 19

Figure 13 Front Panel Layout .......................................................................... 39

Figure 14 A Sample Setup Screen ................................................................... 44

Figure 15 A Sample Title Screen ..................................................................... 45

Figure 16 A Sample LDD and TEC Params Measurement Screen ................. 45

Figure 17 A Sample LDD Params Measurement Screen ................................. 46

Figure 18 A Sample TEC Params Measurement Screen ................................. 47

Figure 19 A Sample LIV Params Measurement Screen .................................. 48

Figure 20 Model 6100 Menu Structure ............................................................ 51

Figure 21 A Sample Set LDD Params Sub-menu ............................................ 51

Figure 22 A Sample Set TEC Params Sub-menu ............................................ 55

Figure 23 A Sample Set Limits Sub-menu ...................................................... 56

Figure 24 A Sample Set PID Gains Sub-menu ................................................ 57

Figure 25 A Sample Customize PID Gains Sub-menu .................................... 57

Figure 26 A Sample Sensor Constants Sub-menu ........................................... 58

Figure 27 A Sample System Parameters Sub-menu ........................................ 59

Figure 28 A Sample Save Parameters Sub-menu ............................................ 59

Figure 29 A Sample Save Parameters Sub-menu ............................................ 60

Figure 30 A Sample Measurement Screen Sub-menu ..................................... 61

Figure 31 A Sample Measurement Screen when Errors Present ..................... 61

Figure 32 A Sample Setup Screen when Errors Present .................................. 62

Figure 33 Rear Panel ........................................................................................ 63

Figure 34 Thermistor Temperature Range ..................................................... 120

Figure 35 Thermistor Resistance verus Temperature .................................... 122

Figure 36 AD590 Nonlinearity ...................................................................... 124

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xii Preface

List of Tables

Table 1 Voltage Selector Switch Settings and Fuse Ratings ........................ 33

Table 2 Laser Diode Error and Limit LED Status Definition ...................... 41

Table 3 TEC Error and Limit LED Status Definition .................................. 42

Table 4 TEC Connector Pin-out ................................................................... 64

Table 5 Laser Diode Connector Pin-out ....................................................... 65

Table 6 I/O Signals Connector Pin Assignments ......................................... 66

Table 7 Command Summary ........................................................................ 76

Table 8 HWCONFIG Register ..................................................................... 82

Table 9 Thermistor Constants ..................................................................... 123

Table 10 RTD Constants .............................................................................. 127

Page 13

1 Safety Precautions

1.1 Definitions and Symbols

The following terms and symbols are used in this documentation and also appear on the Model 6100 Laser Diode and Temperature Controller where safety-related issues occur.

1.1.1 General Warning or Caution

Figure 1 General Warning or Caution Symbol

The Exclamation Symbol in the figure above appears on the product and in Warning and Caution tables throughout this document. This symbol designates that documentation needs to be consulted to determine the nature of a potential hazard, and any actions that have to be taken.

1.1.2 Electric Shock

Figure 2 Electrical Shock Symbol

The Electrical Shock Symbol in the figure above appears throughout this manual. This symbol indicates a hazard arising from dangerous voltage. Any mishandling could result in irreparable damage to the equipment, and personal injury or death.

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14 Safety Precautions

1.1.3 European Union CE Mark

Figure 3 CE Mark

The presence of the CE Mark on Newport Corporation equipment means that this instrument has been designed, tested and certified compliant to all applicable European Union (CE) regulations and recommendations.

1.1.4 Alternating voltage symbol

Figure 4 Alternating Voltage Symbol

This international symbol implies an alternating voltage or current.

1.1.5 On

The symbol in the figure above represents a power switch position on the Model 6100 Laser Diode and Temperature Controller. This symbol represents a Power On condition.

1.1.6 Off

The symbol in the figure above represents a power switch position on the Model 6100 Laser Diode and Temperature Controller. This symbol represents a Power Off condition.

Figure 5 On Symbol

Figure 6 Off Symbol

Page 15

Safety Precautions 15

1.1.7 Fuses

Figure 7 Fuse Symbol

The symbol in the figure above identifies the fuse location on the Model 6100 Laser Diode and Temperature Controller.

1.1.8 USB

Figure 8 USB Symbol

The symbol in the figure above identifies the USB connector location on the Model 6100 Laser Diode and Temperature Controller.

1.1.9 Frame or Chassis

Figure 9 Frame or Chassis Terminal Symbol

The symbol in the figure above appears on the Model 6100 Laser Diode and Temperature Controller. This symbol identifies the frame or chassis terminal

1.1.10 Waste Electrical and Electronic Equipment (WEEE)

Figure 10 WEEE Directive Symbol

This symbol on the product or on its packaging indicates that this product must not be disposed with regular waste. Instead, it is the user responsibility to dispose of waste equipment according to the local laws. The separate collection and recycling of the waste equipment at the time of disposal will

Page 16

16 Safety Precautions

help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For information about where the user can drop off the waste equipment for recycling, please contact your local Newport Corporation representative.

1.1.11 Control of Hazardous Substances

Figure 11 RoHS Compliant Symbol

This label indicates the products comply with the EU Directive 2002/95/EC that restricts the content of six hazardous chemicals.

1.2 Warnings and Cautions

The following are definitions of the Warnings, Cautions and Notes that are used throughout this manual to call your attention to important information regarding your safety, the safety and preservation of your equipment or an important tip.

WARNING

Situation has the potential to cause bodily harm or death.

CAUTION

Situation has the potential to cause damage to property or equipment.

NOTE

Additional information the user or operator should consider.

1.2.1 General Warnings

Observe these general warnings when operating or servicing this equipment:

 Heed all warnings on the unit and in the operating instructions.  Do not use this equipment in or near water.

Page 17

Safety Precautions 17

 This equipment is grounded through the grounding conductor of the

power cord.

 Route power cords and other cables so that they are not likely to be

damaged.

 Disconnect power before cleaning the equipment. Do not use liquid or

aerosol cleaners; use only a damp lint-free cloth.

 Lockout all electrical power sources before servicing the equipment.  To avoid fire hazard, use only the specified fuse(s) with the correct type

number, voltage and current ratings as referenced in the appropriate locations in the service instructions or on the equipment. Only qualified service personnel should replace fuses.

 To avoid explosion, do not operate this equipment in an explosive

atmosphere.

 Qualified service personnel should perform safety checks after any

service.

1.2.2 General Cautions

Observe these cautions when operating this equipment:

 If this equipment is used in a manner not specified in this manual, the

protection provided by this equipment may be impaired.

 To prevent damage to equipment when replacing fuses, locate and correct

the problem that caused the fuse to blow before re-applying power.

 Do not block ventilation openings.  Do not position this product in such a manner that would make it difficult

to disconnect the power cord.

 Position the equipment so that access to the mains disconnect On/Off

switch is readily available.

 Use only the specified replacement parts.  Follow precautions for static sensitive devices when handling this

equipment.

 This product should only be powered as described in the manual.  There are no user-serviceable parts inside the Model 6100 Laser Diode

and Temperature Controller .

 Adhere to good laser safety practices when using this equipment.

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18 Safety Precautions

1.2.3 Summary of Warnings and Cautions

The following general warning and cautions are applicable to this instrument:

Before operating the Model 6100 Laser Diode and Temperature Controller, please read and understand all of Sections 1 thru 4.

Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged. Damaged equipment may present additional hazards to you. Contact Newport technical support for advice before attempting to plug in and operate damaged equipment.

WARNING

To avoid electric shock, connect the instrument to properly earth-grounded, 3-prong receptacles only. Failure to observe this precaution can result in severe injury.

WARNING

Before cleaning the enclosure of the Model 6100 Laser Diode and Temperature Controller, the AC power cord must be disconnected from the wall socket.

CAUTION

There are no user serviceable parts inside the Model 6100 Laser Diode and Temperature Controller. Work performed by persons not authorized by Newport Corporation will void the warranty. For instructions on obtaining warranty repair or service, please refer to Section 8.

WARNING

If this equipment is used in a manner not specified in this manual, the protection provided by this equipment may be impaired.

Page 19

Safety Precautions 19

WARNING

While the Model 6100’s front panel key switch turns power OFF to the internal electronics, is should not be depended upon to fully disconnect the unit from MAINS power. Disconnect the power cord to fully isolate the Model 6100 from MAINS power.

The Model 6100 is intended for use in an industrial environment. Use of this product in other environments, such as residential, may result in electromagnetic compatibility difficulties due to conducted as well as radiated disturbances.

1.3 Location of Labels and Warnings

1.3.1 Rear Panel

Model, Serial Number

and WEEE s

CE Label

Chassis Ground

Fuse Label

mbol

Figure 12 Rear Panel Labels and Warnings

Page 20

20 Safety Precautions

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Page 21

2 General Information

2.1 Introduction

Model 6100 Laser Diode and Temperature Controller is the result of Newport’s continuing commitment to deliver innovative solutions that enable its customers’ success. It offers reliable, high output power at a very competitive price. The ergonomic layout and intuitive front panel controls make this versatile instrument extremely easy to use. A wide range of Laser Diode Driver and TEC temperature control device and user safety features were incorporated into the design of this instrument. The Model 6100 Laser Diode and Temperature Controller complies with applicable CE and CDRH requirements.

Key Product Features:

 USB Plug-and-Play Interface  Configurable shutdown of the Laser Diode Driver upon detection of a

Temperature Controller fault.

 Laser Diode Driver

 15 Watt output power

 Ultra stable output

 Temperature Controller

 32 Watt output power

 Ultra stable bipolar output

 Support for thermistors, AD590, LM335, and Pt RTD sensors.

2.1.1 Laser Diode Driver Subsystem

The 15 Watt Laser Diode Driver can be operated in one of the following two modes:

 Constant Current  Constant Power (using the laser diode’s back facet diode)

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22 General Information

2.1.2 Temperature Controller Subsystem

The 32 Watt Temperature Controller can be operated in one of the following three modes:

 Constant Temperature  Constant Resistance / Reference  Constant TE Current

Four sensor types are compatible with this TEC:

 Thermistors

 AD590 series

 LM335 series

 100Ω Platinum RTDs

2.1.3 Instrument Features

Intuitive Controls and LCD Display

Improved data presentation and system control are achieved using a combination of LCD and 7-segment LED displays. The LCD display shows the entire system configuration as well as TEC and Laser Diode status. The LED displays show the actual operating point of the attached TEC and laser diode. “Menu Keys” guide you through initial system setup routines and operation. Real-time control of an output is accomplished either by entering the set point via the cursor keys or control knob. SETUP/ENTER and ARROW keys access saved system configurations and repetitive procedures. All controls are clearly marked and instructions easily understood for simple operation.

Support for Remote Data Collection

All control and measurement functions are accessible via the USB interface. As your instrumentation needs change, the Model 6100 Laser Diode and Temperature Controller will adapt to all your new applications giving you the ultimate in flexible laboratory equipment.

Page 23

General Information 23

2.2 Input Power

The Model 6100 can be configured to operate on 100, 120, 220, or 240 volt AC power. See Section 3.6 for information on how to configure the Model 6100 for operation on your country-specific AC voltage.

2.3 Available Options and Accessories

500-02 Laser Diode Driver Cable, DB9 Male to Bare Wire

500-04 Laser Diode Driver Cable, DB9 Male to DB9 Female

300-02 Temperature Controller Cable, DB15 Male to Bare Wire

300-04 Temperature Controller Cable, DB15 Male to DB15 Female

Newport Corporation also supplies temperature controlled mounts and other accessories. Please consult with your representative for additional information.

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24 General Information

2.4 Specifications

2.4.1 Laser Diode Driver

Output Connector DB9 DB9

Output Current

Range 0 to 500mA 0 to 1500mA Resolution 7.6 µA 23 µA Accuracy (% of FS) ±0.05% ±0.05% Short-Term Stability (1 hour)1 <50 ppm of FS <200 ppm of FS Long-Term Stability (24 hours)2 <150 ppm of FS <300 ppm of FS Temperature Coefficient <100 ppm/ºC <300 ppm/ºC

Noise/Ripple3 High Bandwidth Mode (rms) <20 µA <50 µA Low Bandwidth Mode (rms) <10 µA <25 µA

Compliance Voltage (Adjustable)

Range 0 to 10V 0 to 10V Resolution 2.5 mV 2.5 mV Accuracy (% of FS) ±0.8% ±0.8%

Current Limit

Range 0 to 505mA 0 to 1515mA Resolution 0.15mA 0.46mA Accuracy ±0.5mA ±1.5mA

Trigger Input

Type Positive edge trigger Positive edge trigger Input Signal 5V CMOS 5V CMOS Input Circuit 680 pull up to +5V 680 pull-up to +5V

Trigger Output

Programmable Pulse Width Range 0.005 to 9999.5ms 0.005 to 9999.5ms Type Positive edge trigger Positive edge trigger

Output Circuit

Analog Control Input

Range 0 to 10V 0 to 10V Input Impedance 22 k 22 k Accuracy ±10mV ±10mV

Open Collector with 680 pull up to +5V

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General Information 25

Photodiode Feedback

Type Differential Differential Range 0 to 5 mA 0 to 5 mA Reverse Bias Adjustable, 0 to 5V Adjustable, 0 to 5V Output Stability 0.1µA 0.1µA Setpoint Accuracy (% of FS) ±0.05% ±0.05%

External Analog Modulation

Input -10 to +10V -10 to +10V Type Differential Differential Input Impedance 10k 10k Transfer Function 50mA/V 150mA/V High Bandwidth DC to 1.4MHz DC to 500kHz Low Bandwidth DC to 15kHz DC to 15kHz

LDD Current Monitor (Output)5 Range 0 to 10V 0 to 10V Transfer Function 50mA/V 150mA/V Output Impedance 100 100 Accuracy (% of FS) ±1% ±1%

LDD Voltage Monitor (Output)6 Range 0 to 10V 0 to 10V Transfer Function 1V/V 1V/V Output Impedance 100 100 Accuracy (% of FS) ±1% ±1%

Measurement Display

Output Current Range 0 to 500mA 0 to 1500mA Resolution 0.01mA 0.1mA Accuracy (% of FS) ±0.05% ±0.05%

Forward Voltage

Range 0 to 10V 0 to 10V Resolution 0.1mV 0.1mV Accuracy (% of FS) ±0.2% ±0.2%

Forward Voltage (Sense Input – 4 Wire Measurement)

Range 0 to 10V 0 to 10V Resolution 0.1mV 0.1mV

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26 General Information

Accuracy (% of FS) ±0.2% ±0.2%

Photodiode Current

Range 0 to 5000µA 0 to 5000µA Resolution 0.01µA 0.01µA Accuracy (% of FS) ±0.05% ±0.05%

Photodiode Responsivity

Range7

0.00 to

999.999µA/mW

0.00 to

999.999µA/mW

Resolution 0.001µA/mW 0.001µA/mW

Optical Power

Range 0.00 to 500.00mW 0.0 to 5000.0mW Resolution 0.01mW 0.1mW

Measured over one-hour period, half scale output.

Measured over 24-hour period, half scale output.

Measured electrically on a resistive load in the middle of the current range.

Measured on a resistive load

This voltage is measured between pins 4 and 17 of the DB-25 SIGNALS I/O Connector. It is proportional with the LDD

Output Current

This voltage is measured between pins 5 and 18 of the DB-25 SIGNALS I/O Connector. It is proportional with the Laser

Diode Forward Voltage

The responsivity value is user defined and is used to calculate the optical power returned by the photodiode

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General Information 27

2.4.2 Temperature Controller

Output Connector DB15

Maximum Output Power

Output Current

Type Bipolar, Constant Current Source Range –4 to + 4A Resolution (manual / remote) 1 mA / 0.1 mA Accuracy ±4 mA Noise/Ripple (rms)1 <0.5 mA

Compliance Voltage Range -8 to +8V

Current Limit Range 0 to 4A Resolution (manual / remote) 1 mA / 0.1 mA Accuracy ±0.3%

Stability Short term (1 hour) ±0.001ºC Long term (24 hour) ±0.002ºC

Display Range Temperature -100.00 to +250.00ºC Resistance Total Range 0.0001 to 250.0k Resistance at 10µA 0.01 to 250.00k Resistance at 100µA 0.001 to 25.000k Resistance at 1mA 0.0001 to 2.5000k Resistance at 10mA 0.1 to 250.0 Resistance RTD 20 to 192 LM335 2331 to 3731mV AD590 248.15 to 378.15µA TE Current -14.000 to +14.000A TE Voltage -24.000 to 24.000V

Model 6100

32W

Noise and rippled measured on a resistive load

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28 General Information

Display Resolution Temperature 0.001ºC Resistance at 10 µA 0.01k Resistance at 100 µA 0.001k Resistance at 1 mA 0.0001k Resistance at 10 mA 0.0001k Resistance RTD 0.001 LM335 0.1 mV AD590 0.01 µA TE Current 1 mA TE Voltage 1 mV

Display Accuracy Temperature2 ±0.001°C Resistance at 1 µA ±0.05% Resistance at 10 µA Resistance at 100 µA Resistance at 1 mA Resistance at 10 mA Resistance RTD LM335 [V] AD590 [µA] TE Current 0.35% TE Voltage 0.35%

±0.05% ±0.05% ±0.05% ±0.08% ±0.08% ±0.05% ±0.05%

Temperature Sensors Thermistors AD590 LM335

Temperature Control Resolution [ºC] 0.0001 0.0001 0.0001 0.0001

Temperature Control Accuracy [ºC] 9 ± 0.001 ± 0.03 ± 0.03 ± 0.001

Sensor Bias Current [mA]

Sensor Bias Voltage [V]  + 4  

0.001, 0.01,

0.1,1, 10

 1 1

RTD

(100Ω)

Temperature accuracy reflects the accuracy of temperature change measurement. This is the uncertainty that the instrument brings into the measurements and it is not a reflection of the absolute temperature measurement, which depends on the thermistor accuracy.

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General Information 29

2.4.3 General Subsystem

Environmental Specifications

Voltage Requirements 100/120/220/240 VAC, 50/60Hz

Power Requirements MAX POWER = 140W

Chassis Ground 4 mm banana jack

Size (H x W x D) [in. (mm)] 3.47 (88.14) x 19.00 (482.60) x 12.24 (310.89)

Mainframe Weight [lb (kg)] 11.2 (5.1)

Operating Temperature 0ºC to 40ºC (<90% humidity non-condensing)

Storage Temperature -30ºC to + 60ºC (<90% humidity non-condensing)

Relative Humidity, Storage <90% humidity non-condensing

Altitude <3000 meters (10000 feet)

Installation Category II

Pollution Degree 2

Use Location Indoor use only

I/O Signals 25-pin female D-sub

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30 General Information

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Page 31

3 Getting Started

3.1 Unpacking and Handling

It is recommended that the Model 6100 Laser Diode and Temperature Controller be unpacked in a lab environment or work site. Unpack the system carefully; small parts are included with the instrument. Inspect the box carefully for loose parts. You are urged to save the packaging material in case you need to ship your equipment in the future.

3.2 Inspection for Damage

The Model 6100 Laser Diode and Temperature Controller is carefully packaged at the factory to minimize the possibility of damage during shipping. Inspect the box for external signs of damage or mishandling. Inspect the contents for damage. If there is visible damage to the instrument upon receipt, inform the shipping company and Newport Corporation immediately. Carefully open the box and save the shipping material for later use.

The user is advised to save the packaging material in case the unit has to be shipped to a different location. The packaging material is specially designed to protect the unit during shipping.

WARNING

CAUTION

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32 Getting Started

3.3 Parts List

The following is a list of parts included with the Model 6100 Laser Diode and Temperature Controller:

1. Start Up Guide (Hardcopy).

2. CD with Software Drivers and Utilities, User’s Manual, Start Up Guide.

3. IEC320 AC line cord with a NEMA 5-15P, or country-specific,

connector.

4. Mating connector for the Temperature Controller output connector.

5. Mating connector for the Laser Diode Driver output connector with the

interlock jumper installed.

6. A pair of keys for the safety keyswitch.

If you are missing any parts or have questions about the parts you have received, please contact Newport Corporation.

3.4 Choosing and Preparing a Suitable Work Surface

The Model 6100 Laser Diode and Temperature Controller may be placed on any reasonably firm table or bench during operation.

3.5 Electrical Requirements

Before attempting to power up the unit for the first time, the following precautions must be followed:

WARNING

To avoid electric shock, connect the instrument to properly earth-grounded, 3-prong receptacles only. Failure to observe this precaution can result in severe injury.

 Have a qualified electrician verify the wall socket that will be used is

properly polarized and properly grounded.

 Provide adequate distance between the Models 6100 Laser Diode and

Temperature Controller and adjacent walls for ventilation purposes. Do not let any other equipment blow hot air towards the Laser Diode and

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Getting Started 33

Temperature Controller. Verify the correct rated fuses are installed according to the fuse marking on the rear panel.

3.6 Power Supplies

WARNING

To avoid electric shock, the Model 6100 must be configured for operation on your specific AC line voltage PRIOR TO CONNECTING THE POWER CORD TO THE AC MAINS See the instructions above for information

AC power is supplied through the rear panel power entry module connector that provides in-line transient protection and RF filtering. The power entry module also contains the instrument’s fuses and the voltage selection switch.

Prior to plugging in the AC line cord, the user MUST configure the Model 6100 for operation on the available AC power. This is accomplished by setting the voltage selector switch on the AC power entry module AND verifying that the correct fuses are installed into the power entry module. Failure to do this can result in degraded instrument performance, damage to the Model 6100, and / or injury to the operator.

The voltage selector switch and the fuses are accessed by opening the power entry module using a flat-bladed screwdriver. Note that the AC line cord must be removed from the power entry module prior to attempting to open it. With the power entry module open, the voltage selector switch setting can be changed by removing the drum, rotating it to the desired setting, and reinstalling the drum.

After correctly setting the voltage selection switch, the fuses installed in the power entry module should be checked for the correct value and, if not correct, changed.

Table 1, below, identifies the correct voltage selector switch setting and fuse ratings for several common AC power

Input Power Voltage Switch Setting Fuses

100 VAC, 50 Hz 100 2A, 250VAC, Slo-Blo 120 VAC, 60 Hz 120 2A, 250VAC, Slo-Blo 220 VAC, 50 Hz 220 1A, 250VAC, Slo-Blo 230 VAC, 50 Hz 230 1A, 250VAC, Slo-Blo 240 VAC, 60 Hz 230 1A, 250VAC, Slo-Blo

Table 1 Voltage Selector Switch Settings and Fuse Ratings

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34 Getting Started

To avoid electric shock, connect the instrument to properly earth-grounded receptacles only. Failure to observe these precautions can result in fire, severe injury or death.

WARNING

To avoid electric shock, the appropriate fuses for the AC input power voltage must be installed in the instrument. Only qualified service personnel should replace fuses. Failure to observe these precautions can result in fire, severe injury or death.

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4 System Operation

WARNING

Before operating the Model 6100 Laser Diode and Temperature Controller, please read and understand all of Section 1.

4.1 General Features

The Model 6100 Laser Diode and Temperature Controller is a precision instrument for driving laser diodes (LDs) and their associated thermoelectric cooler controllers (TECs). Features include:

 Closed-case calibration

 Operational with most thermistors, IC and RTD temperature sensors

 LD operation in Constant Current or Constant Power mode (user

selectable)

 Flexible setup with Save/Recall front panel functions

 High temperature stability

 Current limit and fault sensing on both the TEC and LD outputs.

 Ability to turn OFF current to a LD if a fault is detected with its

associated TEC.

4.1.1 Laser Diode Driver Features

The Laser Diode Driver subsystem of the Model 6100 can be operated in one of the following modes:

 Constant Laser Diode Current  Constant Photodiode Current  Constant Photodiode Power

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36 System Operation

The default mode of operation is Constant Current. The operator can select Constant Power mode by making the desired selection from instrument’s front panel menu or by sending appropriate commands to the instrument from a host PC via USB interface (located on the rear of the unit).

Constant Laser Diode (LD) Current Mode (Const Ild)

In Constant Laser Diode Current mode, the operator explicitly sets the amount of current flow through the attached laser diode using the “Ild” variable. The LDD uses a control loop comparing the Model 6100’s internal current sense to the current set point, raising or lowering the amount of current to reach and maintain that set point.

Constant Photodiode (PD) Current Mode (Const Ipd)

In Constant Photodiode Current mode, the LDD subsystem holds the attached laser diode output current constant based on feedback from the laser diode’s integrated back-facet diode. The LDD uses a control loop comparing the current from the back-facet diode to the current set point (Ipd), raising or lowering the output current to reach and maintain that set point.

Constant Photodiode (PD) Power Mode (Const Ppd)

In Constant Photodiode Power mode, the LDD subsystem holds the attached laser diode output power constant based on feedback from the laser diode’s integrated back facet diode. The photodiode current measured is converted to optical power based on user specified photodiode responsivity. The LDD uses a control loop comparing the current from the back facet diode to the power set point (Ppd), raising or lowering the amount of current to reach and maintain that set point.

4.1.2 Temperature Controller Features

The Temperature Controller subsystem of the Model 6100 can be operated in one of the following modes:

 Constant Temperature  Constant Resistance / Reference  Constant Current

The default mode of operation is Constant Laser Diode Current. The operator can select Constant Photodiode Current or Constant Photodiode Power mode by making the desired selection from the instrument’s front panel menu or by sending appropriate commands to the instrument from a host PC via USB interface (located on the rear of the unit).

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System Operation 37

Constant Temperature Mode (Const Temp)

This mode holds the TEC at a constant temperature based on feedback from the sensor in the TEC mount. In this mode, the 6100 uses a control loop comparing the sensor input to the temperature set point (Ts), driving the Ite current positive or negative to reach and maintain that set point. The thermistor sensor’s input is converted to temperature for display of actual TEC temperature using Steinhart-Hart (S-H) equation. The RTD sensor’s input is converted to temperature for display of actual TEC temperature using Callendar – van Dusen (C-vD) equation.

The sensor constants (both S-H and C-vD coefficients) can be modified using “TEC:CONST” command or through the front panel.

Constant Resistance/Reference Mode (Const R)

This mode operates identically to the Const Temp mode, but the sensor input is not converted to temperature; it is displayed in unconverted form. Likewise, the set point is used directly, not converted from temperature. Thermistor and RTD sensors use resistance (“Rs=” and “R=” variables), LM335 sensors use millivolts (“vs=” and “v=” variables), and AD590 sensors use microamps (“is=” and “i=” variables). Const R is primarily intended for users who know a sensor set point in “sensor” units, not in ºC.

Constant Current Mode (Const Ite)

Unlike the modes above, the Const Current mode allows the operator to explicitly set the amount and direction of current flow through the TEC, using “Is=” and “Ite=” variables. If a sensor has been selected, the TEC temperature will be displayed. Although temperature is not a factor in the amount or direction of current flow, the high and low temperature limits are observed, and will shutdown the output if exceeded in Const Ite mode, if a sensor is selected. For no temperature limits, set the sensor type to “None.” Use caution when limits are not active, as the temperature may exceed your TEC's thermal limits.

4.2 Safety Features

The Model 6100 Laser Diode and Temperature Controller features a multitude of safety features to help protect the attached laser diodes and TEC coolers.

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38 System Operation

4.2.1 Conditions Which Will Automatically Shut OFF the Laser Diode Output

 Current Limit

 Open Circuit

 Mode Change

 Range Change

 Bandwidth Change

 Photodiode Responsivity Change

 TEC output is turned OFF,(only when the LD protection feature

enabled)

4.2.2 Conditions Which Will Automatically Shut OFF the TEC Output

 High Temperature Limit (Constant Temperature and Constant Current

modes only)

 Low Temperature Limit (Constant Temperature and Constant Current

modes only)

 High Resistance/Reference Limit (Constant Resistance/Reference

mode only)

 Low Resistance/Reference Limit (Constant Resistance/Reference

mode only)

 Compliance Voltage Limit

 TEC Open

 Sensor Open

 Sensor Select changed

 Sensor Shorted

 Mode Change

4.2.3 Power Line Surge Protection

The Model 6100 unit contains circuitry to minimize the impact of power line surges. In order to further protect an attached laser diodes and TEC coolers, the 6100 contains circuitry to immediately shut down one or both of the outputs when a large surge is detected.

This secondary protection capability instantly disables an output when it senses that the output’s current exceeds 3% of the set current limit or that the

Page 39

System Operation 39

voltage on the output is above the maximum compliance voltage. (Except in the case of very large power line surges, the output currents cannot exceed the user-specified current limits.)

4.3 Front Panel

The front panel of the Model 6100 Laser Diode and Temperature Controller is designed for easy operation. It has various distinct areas, each with a specific set of related functions, and a control knob, as shown in Figure 13 below.

4.3.1 Key Switch

The controller’s main electrical power ON / OFF switch is located on the bottom left-hand corner of the front panel. With the 6100 connected to an AC power source, the instrument electrical power is completely turned-OFF when the key switch is in the “0” position. Conversely, the unit’s electrical power is turned-ON when the key switch is in the “I” position.

During the power-up sequence, the following take place:

The instrument is restored to the state in which it was last turned OFF.

The Laser Diode and TEC outputs are turned OFF.

The instrument’s firmware version is displayed on the LCD screen for a few seconds

Figure 13 Front Panel Layout

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40 System Operation

The beeper is turned ON, if enabled, briefly.

The 6100 has a key switch for this function, rather than a conventional push button or rocker switch, to meet the CDRH laser safety key switch lockout requirements.

4.3.2 LASER DIODE OUTPUT ON Switch and Indicator

The switch will activate the ON LED and allow current flow to the laser diode after an approximately 3 second delay. CDRH regulations require a minimum delay of 3 seconds.) Current will not flow unless the laser diode is correctly connected and the interlock pins, pin 1 and 2 of the DB-9 LDD Output Connector (located on the rear panel), are shorted together.

4.3.3 LASER DIODE ERROR Indicator LED

The following conditions will cause the red ERROR LED and its protection circuitry to activate, automatically shutting off the output:

An open circuit in the laser diode package or cabling.

Laser diode oscillation causing current to exceed the previously set current limit value.

Certain external transient events that could damage the laser.

Shutdown of the Temperature Controller Subsystem (if this feature is enabled)

Mode Change

Range Change

Bandwidth Change

Photodiode Responsivity Change

To clear these conditions and to turn OFF the ERROR LED, all the error conditions must be addressed, and the output must be turned ON. See the Commands Section for additional information.

4.3.4 LASER DIODE LIMIT Indicator LED

A soft limit occurs when the output current gradually exceeds a preset value, clamping the current flow at that level or the compliance voltage exceeds preset voltage limit value. These conditions cause the LIMIT LED to blink until they are no longer violated.

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System Operation 41

ERROR LED LIMIT LED CONDITION

((Internal temperature exceeds 80

ON ON

(Rear panel Interlock de-asserted) OR

(Hard current limit condition asserted)) OFF BLINKING Soft limit condition asserted by circuitry OFF OFF No error condition detected

Table 2 Laser Diode Error and Limit LED Status Definition

4.3.5 LASER DIODE Display Section

The lower-left quadrant of the Model 6100 front panel has a 5 digit green LED array. The table below shows the displayed value and the state of units LEDs based on the LDD mode of operation.

Mode Displayed Value “mW” LED “mA” LED

Constant Laser diode Current

Constant Photodiode Current

Actual output current OFF ON

Actual photodiode current

C) OR

OFF OFF

Constant Photodiode

Actual power ON OFF

Power

4.3.6 TEC OUTPUT ON Switch and Indicator

The switch will activate the ON LED and allow current flow to the TEC. Current will not flow unless the TEC is correctly connected and the interlock pins (pin 3 & 4 of the TEC output connector) are not connected one to each other. This is the default behavior. The user can change this state to opposite, and direct the TEC to not turn the output on, unless the interlock pins are connected together, by reprogramming the Interlock Monitor (see HWCONFIG command in Section 5.5).

4.3.7 TEC ERROR Indicator LED

The following conditions will cause the red ERROR LED and its protection circuitry to activate, automatically shutting off the output:

High/Low Temperature Limit (Constant temperature and current modes only)

High/Low Resistance/Reference Limit (Constant resistance/reference mode only))

TEC Open

Sensor Open

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42 System Operation

Sensor Select changed

Sensor Shorted

Mode Change

To clear these conditions and to turn OFF the ERROR LED, all the error conditions must be addressed, and the output must be turned ON. See the Commands Section for additional information.

4.3.8 TEC LIMIT Indicator LED

A soft limit occurs when the output current exceeds a preset limit value, clamping the current flow at that level and causing the LIMIT LED to blink. The LIMIT LED stops blinking and is turned OFF automatically when the output current does not exceed the current limit.

ERROR LED LIMIT LED CONDITION

ON ON

OFF BLINKING

OFF OFF No error condition detected

((Interlock asserted) OR (Internal temperature exceeds 80 oC) OR (Sensor Short) OR (Sensor Open) OR (Compliance voltage exceeds 10.3V) OR (Temperature outside T_High and T_Low limit settings) OR (Resistance outside R_High and R_Low limit settings)) ((Output current exceeds current limit) OR (Compliance voltage exceeds voltage limit))

Table 3 TEC Error and Limit LED Status Definition

4.3.9 TEC Status LEDs

The HEAT and COOL STATUS LEDs indicate if the Temperature Controller Subsystem is attempting to raise or lower the temperature of the attached TEC.

4.3.10 TEC DISPLAY Section

The lower-right quadrant of the Model 6100 front panel has a 5 digit green LED array. The table below shows the displayed value and the state of units LEDs based on the TEC mode of operation.

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System Operation 43

Mode Displayed Value “k” LED “oC” LED “A” LED

Constant Current

Constant Temperature

Constant Resistance /

Actual output current

Actual temperature

Actual resistance / reference

Reference

4.4 Menu Section

In addition to displaying status parameters on the two 5-segment LED displays(bottom sections) of the instrument, the Menu (top section) section of the Model 6100 front panel enables users to view/change many more parameters including feedback sensor type, PID values, and Steinhart-Hart or Callendar – van Dusen coefficients, for example. Prior error messages can be viewed as well.

4.4.1 Control Knob

The control knob on the right side of the front panel is used to set the value of parameters such as Laser diode current setpoint (Ild), TEC temperature setpoint (Ts) etc. Users can select the parameter whose value needs to be modified using the Setup/Enter and Cursor Arrow keys, and then modify the values with the knob. Alternately, the parameters’ values can be modified with the Arrow keys.

OFF OFF ON

OFF ON OFF

ON only if

OFF OFF sensor is thermistor.

The knob has an acceleration algorithm that causes the rate of change of value to increase as the knob is turned faster. Turning slowly allows for a fine adjustment at the smallest displayed decimal place.

4.4.2 Setup / Enter

The Setup/Enter key is used to (a) invoke the Setup screen, (b) accept parameter change, or (c) enter a lower menu level, depending on the screen displayed.

4.4.3 Esc

The Esc key is used to (a) cancel a parameter change or (b) back up one menu level.

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44 System Operation

4.4.4 Cursor Arrow Keys

Moves cursor up or down or between editable data fields. The down arrow decrements values in numerical entry fields, or selects a previous choice in a multi-choice entry field. The up arrow increments values in numerical entry fields, or selects a next choice in multi-choice entry fields. The right and left arrow keys are used to move the cursor position in numerical entry fields.

4.4.5 Display Elements

The Model 6100 uses a character display to depict information about the current state of the system. The display screens shown by the instrument can be classified as follows: title screen, measurement screen, setup screen and error message screen.

4.4.6 Menu Selection

All information displayed in various 6100 screens, with the exception of title

screen and error message screen, can be in one of two states: selected or unselected. A selected item can be in one of two states: idle or active.

Selected item in idle state

Unselected items

A selected item in idle state is indicated by a diamond symbol () placed to

the left of the item. The idle state is the default state for a selected item. In this state, the present value of the item may be displayed next to the label depending upon the type of item. Pressing the SETUP/ENTER key will cause the instrument to display a sub-menu for that item, should one be available.

Otherwise, it will change the display state for that item from idle to active. A selected item in active state is indicated by flashing data associated with

that item. The cursor arrow keys can be used to modify the data (numerical or non-numerical). Once the data has been modified, pressing SETUP/ENTER key will cause the instrument to accept the new data and return the item to idle state. Pressing the Esc key will cause the display to ignore any changes made, and return to the previous menu.

Set Limits

Mode = Const Temp Sensor= 10kΩ Therm Set PID Gains 

Figure 14 A Sample Setup Screen

Data associated with item

Down arrow indicator

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System Operation 45

An unselected item simply displays the item name. Depending upon the item

(Mode, Sensor, Setpoint), it may also display data associated with that item. The Setup screens also have up () and down () indicators to show that

more items can be accessed by pressing UP and DOWN arrow keys respectively.

4.4.7 Title Screen

The title screen is displayed for a few seconds every time the instrument is powered ON. This screen is used to display the present firmware version of the instrument. A sample title screen is shown in Figure 15.

Newport Corp. 6100 – Laser Diode and Temp.Controller Ver. 1.0.1.0

Firmware version number

4.4.8 Measurement Screen

The measurement screen is displayed after the instrument has been powered ON for a few seconds. This is the topmost level display during normal operation, and it indicates the status of the instrument. The instrument supports four different measurement screens: LDD and TEC Params screen, LDD Params screen, TEC Params screen and LIV Params screen.

4.4.8.1 LDD and TEC Params Measurement Screen

A sample LDD and TEC Params measurement screen is shown in Figure 16.

Figure 15 A Sample Title Screen

LDD:Ild= 250.00mA Im = 0.0uA TEC: Ts = 25.000oC Ite= 0.000 A

In this screen, the most important parameters related to LDD and TEC are shown. The contents of this screen can vary depending upon the mode of operation. See table below for details.

Figure 16 A Sample LDD and TEC Params Measurement Screen

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46 System Operation

LDD Parameters:

LDD Mode Parameter 1 Parameter 2

Constant LD Current Laser Diode Current

Setpoint (Ild)

Constant PD Current Photodiode Current

Setpoint (Ipd)

Contant PD Power Photodiode Power

Setpoint (Ppd)

TEC Parameters:

TEC Mode Parameter 1 Parameter 2

Constant Current Output Current

Setpoint (Is)

Constant Resistance/Reference

Constant Temperature Temperature Setpoint

Users can modify the setpoints for both LDD and TEC from this screen. A diamond symbol () to the left of the setpoint variable indicates the “selected” parameter; selected parameters are those that can be modified through either the Control Knob or Cursor Arrow Keys.

Resistance/Reference Setpoint (Rs)

(Ts)

Actual Photodiode Current (Im)

Actual Laser Diode Current (Io)

Actual Temperature (T)

Actual Output Current (Ite)

Some messages are displayed on this screen to draw users’ attention to various events that may require them to take corrective action(s). For instance, a flashing “E” symbol is shown on the left-top corner of the display whenever the instrument generates an error message.

4.4.8.2 LDD Params Measurement Screen

A sample LDD Params measurement screen is shown in Figure 16.

LDD:Ild= 250.00mA Mode= LD Curr Im = 0.0uA Vf = 0.000 V

Figure 17 A Sample LDD Params Measurement Screen

In this screen, the most important parameters related to LDD are shown. The contents of this screen can vary depending upon the mode of operation. See table below for details.

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System Operation 47

LDD Mode Parameter 1 Parameter 3

Constant LD Current Laser Diode Current

Setpoint (Ild)

Constant PD Current Photodiode Current

Setpoint (Ipd)

Constant PD Power Photodiode Power

Setpoint (Ppd)

Users can modify the setpoints for LDD only from this screen. A diamond symbol () to the left of the setpoint variable indicates the “selected” parameter; selected parameters are those that can be modified through either the Control Knob or Cursor Arrow Keys.

4.4.8.3 TEC Params Measurement Screen

A sample TEC Params measurement screen is shown in Figure 16.

Actual Photodiode Current (Im)

Actual Laser Diode Current (Io)

TEC:Ts = 25.000oC Mode= Temp Ite= 0.000 A Vte= 0.000 V

Figure 18 A Sample TEC Params Measurement Screen

In this screen, the most important parameters related to TEC are shown. The contents of this screen can vary depending upon the mode of operation. See table below for details.

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48 System Operation

TEC Mode Parameter 1 Parameter 3

Constant Current Output Current

Setpoint (Is)

Constant Resistance/Reference

Contant Temperature Temperature Setpoint

Users can modify the setpoints for TEC only from this screen. A diamond symbol () to the left of the setpoint variable indicates the “selected” parameter; selected parameters are those that can be modified through either the Control Knob or Cursor Arrow Keys.

4.4.8.4 LIV Params Measurement Screen

A sample LIV Params measurement screen is shown in Figure 16.

Resistance/Reference Setpoint (Rs)

(Ts)

Actual Temperature (T)

Actual Output Current (Ite)

LIV:Ild = 0.00mA Im = 0.0uA Vf = 0.000 V Va = 0.000 V

Figure 19 A Sample LIV Params Measurement Screen

In this screen, the most important parameters related to LIV are shown. While the main purpose of this screen is to view the state of various LIV related parameters, this screen can be used to adjust LDD setpoint. The contents of this screen can vary depending upon the mode of operation. See table below for details.

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System Operation 49

LDD Mode Parameter 1 Parameter 2

Constant LD Current Laser Diode Current

Constant PD Current Photodiode Current

Contant PD Power Photodiode Power

The third and fourth parameters displayed on this screen are: LD Forward voltage (Vf) and Analog input (Va).

4.4.9 Setup Screens

The setup screens are used to modify LDD, TEC and system settings. These screens can be accessed from the Measurement Screens by pressing the Setup/Enter key.

Setpoint (Ild)

Setpoint (Ipd)

Setpoint (Ppd)

Actual Photodiode Current (Im)

Actual Laser Diode Current (Io)

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50 System Operation

Setup/Enter

Set LDD Params

Set TEC Params

Set Limits

Mode

Range

Bandwidth

Modulation

Set PD Constants

Link LDD/TEC

Set Limits

Mode

Sensor

Set PID Gains

Set Sensor Const

Lim Io Lim Im Lim Po Vcomp

PD Responsivity

Get/Clr PD Zero

PD Zero

Apply Zero

Lim Ite

Lim Vte Lim Tlo (Rlo) Lim Thi (Rhi)

Preset

Customize Gains

C1 C2

C3 (therm, RTD)

Ro (RTD)

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System Operation 51

Setup/Enter

Set System Params

Brightness

Lock Dial

Aud. Beep USB Address Save Settings

Bin Number

Save

Recall Settings

Bin Number

Recall

Set Meas. Screen

LDD and TEC

LDD Params

TEC Params

LIV Params

Figure 20 Model 6100 Menu Structure

4.4.9.1 Set LDD Params Menu

The Set LDD Params Menu is used to change parameters related to LDD operation. These parameters, as shown in the menu structure above, are: safety limits, mode of operation, current range, bandwidth, modulation state and photodiode responsivity.

To modify LDD parameters, press the SETUP/ENTER key when the instrument is displaying the Measurement Screen. Press the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key again to enter a sub-menu for this item. A sample sub-menu for setting the LDD Params is shown in figure below.

Set Limits



Mode = LD Current Range = 500 mA

Bandwidth = Low 

Figure 21 A Sample Set LDD Params Sub-menu

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52 System Operation

Set Limits Menu

The Set Limits menu item is used to change the limit settings—LD Current, PD Current, PD Power and Compliance Voltage limits.

To set the desired limits, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the limits is shown in figure below. Use the UP and DOWN arrow keys to select a desired sub-menu item. By default, this item will be in idle state and the present limit value will be displayed. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the leading indicator begins flashing. Use the cursor arrow keys to select the desired digit and to increment/decrement the value. Once the desired value has been entered, press SETUP/ENTER key to accept the new limit value. The new limit value will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set Limits main menu.

Lim Io = 40.00 mA

Lim Im = 5000.0 uA Lim Po = Zero Resp Vcomp = 2.500 V

The PD Power limit will display the text, “Zero Resp”, when the PD responsivity is set to zero. In this state, the valid LDD modes of operation are: LD Current and PD Current. The instrument does not allow users to select “PD Power” mode of operation. A desired PD Power limit can be defined after changing the PD responsivity to a non-zero value.

Mode Menu

The Mode menu item is used to change the instrument’s LDD mode of operation (LD Current, PD Current or PD Power).

To set the desired mode of operation, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present mode of operation will be displayed next to the “Mode =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present mode begins flashing. Use the UP and DOWN arrow keys to select the desired mode and press SETUP/ENTER key to accept the new mode. The new mode will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

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Range Menu

The Range menu item is used to change the instrument’s LDD current range (500mA or 1500mA).

To set the desired current range, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present range will be displayed next to the “Range =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present range begins flashing. Use the UP and DOWN arrow keys to select the desired range and press SETUP/ENTER key to accept the new range. The new range will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

Bandwidth Menu

The Bandwidth menu item is used to change the instrument’s LDD current bandwidth (Low or High).

To set the desired current bandwidth, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present bandwidth will be displayed next to the “Bandwidth =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present bandwidth begins flashing. Use the UP and DOWN arrow keys to select the desired bandwidth and press SETUP/ENTER key to accept the new bandwidth. The new bandwidth will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

Modulation Menu

WARNING

When using the current modulation feature, ensure that the modulation signal source is disabled before enabling the 6100 laser current output. Turning on the laser current output when the modulation is enabled can cause current transients that can damage laser diodes.

The Modulation menu item is used to change the instrument’s LDD current modulation state (Off or On).

To set the desired current modulation state, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present modulation state will be displayed next to the “Modulation =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present modulation state begins flashing. Use the UP and DOWN arrow keys to select the desired modulation

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state and press SETUP/ENTER key to accept the new modulation state. The new modulation state will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

Set PD Constants Menu

The Set PD Constants menu item is used to change the photodiode related settings—PD Responsivity, Zero the PD Current reading by either capturing the present PD Current measurement or by entering a desired value, Set a flag to apply the Zero value or otherwise.

To set the desired PD related settings, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu is shown in figure below. Use the UP and DOWN arrow keys to select a desired sub-menu item. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the leading indicator begins flashing. Use the cursor arrow keys to select the desired digit and to increment/decrement the value. Once the desired value has been entered, press SETUP/ENTER key to accept the new value. The new value will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set PD Constants main menu.

Resp= 0.000uA/mW

Get/Clear PD Zero PD Zero = 0.0 uA Apply Zero = No

Link LDD/TEC Menu

The Link LDD/TEC menu item is used to change the LDD output requirement to have TEC output ON prior to turning LDD output ON. This setting is also used to set whether LDD output should be disabled automatically if TEC output gets disabled.

To set the desired LDD safety state, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present selection will be displayed next to the “Link LDD/TEC =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present selecction begins flashing. Use the UP and DOWN arrow keys to select the desired option and press SETUP/ENTER key to accept the new option. The new LDD safety state will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

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4.4.9.2 Set TEC Params Menu

The Set TEC Params Menu is used to change parameters related to TEC operation. These parameters, as shown in the menu structure above, are: safety limits, mode of operation, feedback sensor type, PID control loop gains, and feedback sensor constants.

To modify TEC parameters, press the SETUP/ENTER key when the instrument is displaying the Measurement Screen. Press the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key again to enter a sub-menu for this item. A sample sub-menu for setting the TEC Params is shown in figure below.

Set Limits

Mode = Const Temp Sensor= 10kΩ Therm

Set PID Gains 

Figure 22 A Sample Set TEC Params Sub-menu

Set Limits Menu

The Set Limits menu item is used to change the limit settings—current limit, voltage limit, temperature limits (in Constant Temperature mode) and resistance limits (in Constant Resistance mode).

Lim Ite= 5.000 A

Lim Vte= 10.000 V Lim Tlo= 15.00°C Lim Thi= 35.00°C

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Figure 23 A Sample Set Limits Sub-menu

Mode Menu

The Mode menu item is used to change the instrument’s TEC mode of operation.

Sensor Menu

The Sensor menu item is used to change the feedback sensor.

To set the desired sensor type, use the UP and DOWN arrow keys to select this menu item. By default, this item will be in idle state and the present sensor selection will be displayed next to the “Sensor =” label. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the present sensor begins flashing. Use the UP and DOWN arrow keys to select the desired sensor and press SETUP/ENTER key to accept the new sensor. The new sensor selection will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes.

Set PID Gains Menu

The Set PID Gains menu item is used to change the PID control loop gains. These gains are used by the instrument to maintain the present temperature (in Constant Temperature mode) or resistance (in Constant Resistance mode) at their setpoint level; they are not used when the instrument is operated in Constant Current mode.

To select preset PID gains or to customize them, use the UP and DOWN arrow keys to select the Set PID Gains menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the gains is shown in figure below.

Preset= Preset 000

Customize Gains

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Figure 24 A Sample Set PID Gains Sub-menu

To select a preset PID gains bin, use the UP and DOWN arrow keys to select Preset sub-menu item. By default, this item will be in idle state and the present Preset bin number value will be displayed. Press the SETUP/ENTER key to change this item’s state from idle to active. Once the item is in active state, the bin number begins flashing. Use the UP/DOWN arrow keys to select the desired bin number. Once the desired value has been selected, press SETUP/ENTER key to accept the new value. The PID gains associated with the new bin will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set PID Gains main menu.

To customize PID gains, use the UP and DOWN arrow keys to select Customize Gains sub-menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for customizing the gains is shown in figure below.

Kp = 1.000

Ki = 0.005 Kd = 1.000 Il = 10.000

Figure 25 A Sample Customize PID Gains Sub-menu

Use the UP and DOWN arrow keys to select the PID gain that needs to be modified. Once the desired item has been selected, press the SETUP/ENTER key to change the item’s state from idle to active. Once the item is in active state, the leading digit begins flashing. Use the cursor keys to specify a desired value. Once the desired value has been selected, press SETUP/ENTER key to accept the new value. The new PID gain will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set PID Gains main menu.

It is highly recommended that the output be turned OFF before the gains are customized.

Set Sensor Constants Menu

The Set Sensor Constants menu item is used to change the constants for the previously selected sensor. These constants are used to convert feedback signal from resistance (if sensor is a thermistor or an RTD) or voltage (if sensor is LM335) or current (if sensor is AD590) to temperature. Please refer

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the description of TEC:CONST command for further details on these constants.

To modify these constants, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the sensor constants is shown in figure below. The contents of this screen will vary depending upon the sensor selected.

C1 = 1.129

C2 = 2.341 C3 = 0.877

Figure 26 A Sample Sensor Constants Sub-menu

Use the UP and DOWN arrow keys to select the sensor constant that needs to be modified. Once the desired item has been selected, press the SETUP/ENTER key to change the item’s state from idle to active. Once the item is in active state, the leading digit begins flashing. Use the cursor keys to specify a desired value. Once the desired value has been selected, press SETUP/ENTER key to accept the new value. The new sensor constant will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set Sensor Constants main menu.

It is highly recommended that the output be turned OFF before the gains are customized.

4.4.9.3 Set System Params Menu

The Set System Params menu item is used to change display brightness, lock the dial on the front panel, turn beeper ON/OFF, USB address, and to save/recall system settings

To modify these constants, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the system parameters is shown in figure below.

Brightness = 100%

Lock Dial = No Aud. Beep = Yes

USB Address= 1 

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Figure 27 A Sample System Parameters Sub-menu

Use the UP and DOWN arrow keys to select the parameter that needs to be modified. Once the desired item has been selected, press the SETUP/ENTER key to change the item’s state from idle to active. Once the item is in active state, use the cursor keys to specify a desired value. Once the desired value has been selected, press SETUP/ENTER key to accept the new value. The new parameters will take effect immediately, and the menu item will be returned to idle state. Press Esc key to cancel any changes or to return to Set System Params main menu.

Save Settings Menu

The Save Settings menu item is used to store the instrument’s setup configurations for future use. For example, a specific test setup may be saved for later use, and then another setup may be used presently. When the user desires to perform the specific test, its setup is simply recalled.

Non-volatile flash memory is used for saving the instrument’s parameters. When a save operation is performed, all of the parameters which are currently in effect on the instrument are stored. The user selects a “bin” number for saving the parameters, up to the maximum available in the instrument. Then, when that “bin” number is recalled, the instrument is reconfigured to the previously stored values. A special “bin 0” is reserved for the reset state. Recalling bin 0 will reset the unit to factory defaults.

To perform the save operation, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for setting the system parameters is shown in figure below.

Bin Number = 1

Push Enter to Save

Figure 28 A Sample Save Parameters Sub-menu

Use the UP arrow key to select the Bin Number. Press the SETUP/ENTER key to change the Bin Number menu state from idle to active. Once the item is in active state, use the cursor keys to select the desire bin number. Press SETUP/ENTER key to accept the desired bin.

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Now, use the DOWN arrow key to select the menu item that states “Press Enter to Save”. Press SETUP/ENTER key with this menu item selected to save the system settings to the bin number selected earlier. The instrument will automatically return to the Measurement screen once the saving process has completed.

Recall Settings Menu

The Recall Settings menu item is used to recall previously saved instrument’s setup configurations. Recalling bin 0 will reset the unit to factory defaults.

To perform the recall operation, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for recalling the system parameters is shown in figure below.

Bin Number = 1

Push Enter to Rcl.

Figure 29 A Sample Save Parameters Sub-menu

Use the UP arrow key to select the Bin Number. Press the SETUP/ENTER key to change the Bin Number menu state from idle to active. Once the item is in active state,.use the cursor keys to select the desire bin number. Press SETUP/ENTER key to accept the desired bin.

Now, use the DOWN arrow key to select the menu item that states “Press Enter to Rcl”. Press SETUP/ENTER key with this menu item selected to recall the system settings from the bin number selected earlier. The instrument will automatically return to the Measurement screen once the recalling process has completed.

4.4.9.4 Set Meas. Screen Menu

The Set Meas. Screen menu item is used to change the main measurement screen: LDD and TEC Params or LDD Params or TEC Params or LIV Params.

To select the desired measurement screen, use the UP and DOWN arrow keys to select this menu item. Press the SETUP/ENTER key to enter a sub-menu for this item. A sample sub-menu for selecting the measurement screen is shown in figure below.

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LDD and TEC Params



LDD Params TEC Params LIV Params

Figure 30 A Sample Measurement Screen Sub-menu

Use the UP and DOWN arrow keys to select the desired measurement screen. Once the desired item has been selected, press the SETUP/ENTER key to accept the new selection. The new selection will take effect immediately, and the unit returns to the main measurement screen. Press Esc key to return to Set Meas. Screen main menu.

4.4.9.5 Error Message Screen

Whenever the instrument generates an error message, a flashing “E” symbol is shown on the left-top corner of the Measurement screen as shown in figure below. Users can retrieve this error message from the instrument from the Error Message screen. To retrieve error messages, press the SETUP/ENTER key to view the setup menu. The first menu item will be “GET ERRORS” as shown in the figure below.

LDD:Ild= 250.00mA

Error Message Indicator

Im = 0.0uA TEC: Ts = 25.000oC Ite= 0.000 A

Figure 31 A Sample Measurement Screen when Errors Present

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GET ERRORS

Set LDD Params Set TEC Params Set System Params 

Figure 32 A Sample Setup Screen when Errors Present

Select the Get Errors menu item by pressing the UP arrow key. Once this item is selected press SETUP/ENTER key to enter the Error Messages screen. All the error messages generated are listed on this screen in a chronological order (oldest first). All the error messages can be viewed by pressing the UP and DOWN arrow keys. Press the Esc key to return to the Setup screen. Note that this process removes the errors from error buffer, and they will not be available for querying via USB communication interface.

4.5 Rear Panel

The Model 6100 rear panel has a TEC OUTPUT connector, a LASER DIODE OUTPUT connector, SIGNALS I/O connector, a USB connector, a MODULATION INPUT connector, a PHOTODIODE INPUT, a Photodiode bias adjustment potentiometer, and the AC power entry module.

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Figure 33 Rear Panel

4.5.1 USB Interface

The instrument is designed to communicate with standard USB Host interfaces. The connector on the rear panel is a standard USB-B (Full-Size, Device).

4.5.2 Chassis GND

This 4 mm banana jack is connected to chassis ground. It is intended to be used as an additional earth ground connection for the Model 6100’s enclosure.

4.5.3 AC Power Cord

The Model 6100 can be operated on either 50 or 60 Hz mains power. The instrument can be configured for operation at the following nominal AC line voltages -- 100, 120, 220, 230, or 240 VAC. See section 3.6 for information on properly configuring the Model 6100 for the available mains power.

The line cord supplied with each unit should be plugged only into a properly grounded outlet to prevent electrical shock in the event of an internal short circuit to the metal cabinet. The detachable line cord should be connected to the IEC320 connector on the power entry module.

4.5.4 Fuses

The correct fuses must be installed into the fuse holder that is part of the AC power entry module. Please check the fuse label on the rear panel, before installing new fuses (see Figure 33).

WARNING

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4.5.5 TEC Output Connector

A DB-15 female D-connector is used for input and output connections, as shown by the pin out diagram below.

Pin Description

1 TEC+ 2 TEC+ 3 TEC4 TEC5 TEC Shield 6 Sensor Shield 7 Sensor+ 8 Sensor-

9 10 11 12 13 14 15

Table 4 TEC Connector Pin-out

4.5.5.1 TEC Grounding Consideration

The TEC output is isolated from chassis ground, allowing either output terminal (TE+ or TE-) to be connected to Earth Ground at the user's option.

Do not connect the temperature sensor to Earth Ground at the same time with grounding either TE+ or TE-. Only one connection to ground is accepted. Failure to do so may result in the unit malfunction or/and damage. Be careful when connecting other instruments to 6100 Laser Diode and Temperature Controller, as they may have their ground connected to the Earth Ground.

For example, oscilloscopes have the probe ground connected to Earth Ground. If either TE+ or TE- is already connected to Earth Ground, the oscilloscope may bring the second connection, causing malfunction or damage.

CAUTION

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4.5.6 Laser Diode Output Connector

A DB-9 female D-connector is used for input and output connections, as shown by the pin out diagram below.

Pin Description

1 Interlock 2 Interlock Return 3 Chassis Ground 4 Laser Diode Cathode 5 Laser Diode Cathode 6 Photodiode Cathode 7 Photodiode Anode 8 Laser Diode Anode 9 Laser Diode Anode

Table 5 Laser Diode Connector Pin-out

4.5.6.1 Laser Diode Grounding Consideration

The Laser Diode output is isolated from chassis ground, allowing either output terminal (Laser Diode Anode or Laser Diode Cathode) to be connected to Earth Ground at the user's option. Furthermore, the Laser Diode subsystem outputs are isolated from the Temperature Controller subsystem outputs; a single ground connection can be made for each.

CAUTION

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4.5.7 I/O Signals Connector

This female 25 pin D-connector provides access to various analog and digital input/output signals. The signal pin assignments for this connector are shown in Table 6, below. Detailed information on these signals is provided in Section 4.6.

Pin No. Name Descriptions

1 Fault Output 2 TTL Input

3 TTL Output

4 LDD Current Monitor (Output)

5 LDD Voltage Monitor (Output)

6 Analog Control (Input)

7 LD Anode Sense (Input)

8 Chassis Ground

9 10 11 12 13 14 Fault Output Return 15 TTL Input Return 16 TTL Output Return

19 Analog Control Input (Return)

20 LD Cathode Sense (Input)

21 22 23 24 25

LDD Current Monitor Output

LDD Voltage Monitor Output

reserved reserved reserved reserved reserved

(Return)

reserved reserved reserved reserved reserved

+5V TTL-Level Output General Input. +5V (Digital) Pull Up

General Output. +5V TTL-Level Output Differential Analog signal proportional to LDD output current. Level 0-10V (into 10K load) Differential Analog signal equal to the compliance voltage. Level 0Max Compliance Voltage (into 10K load) Differential Analog signal. MPU sampled LD current setpoint command. Level 0 - 10V Analog, 10Hz (max) input. Requires USB command to activate. Differential Analog Input. Monitors LD voltage. Works in conjunction with pin 20.

Chassis Ground

Digital Ground Digital Ground Digital Ground

Differential Analog Output.

Differential Analog Input. Differential Analog Input. Monitors LD voltage. Works in conjunction with pin 7.

Table 6 I/O Signals Connector Pin Assignments

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4.6 Signals I/O

The rear panel SIGNALS I/O connector provides several signals for remotely controlling and monitoring the Model 6100 Laser Diode and Temperature Controller.

There are four different grounds – the Chassis Ground, the Digital Ground, the Laser Diode Analog Ground, and the Temperature Controller Analog Ground. The Laser Diode Analog Ground, Temperature Controller Analog Ground, and the Digital Ground are isolated from each other within the Model 6100.

The Chassis Ground is also isolated from the other three grounds. The Chassis Ground and Digital Ground are available to the user on the back panel DB-25 female connector. Although it is not required, these grounds may be connected together externally provided ground loops are not introduced. Such ground loops will degrade the performance of the unit. Because the USB interface is referenced to digital ground, users should be especially careful not to introduce a ground loop through an externally-connected computer, which usually connect the Digital Ground to Chassis Ground.

The best approach is to have the chassis ground connected in one single point in a system so that currents between the grounds are avoided.

Cables and wires connected to the Model 6100’s SIGNALS I/O connector must be fully shielded. The shield must be connected to the shell of the mating connector. Failure to do so may reduce the immunity of the Model 6100 to external electrical and magnetic fields and thereby damage an attached laser diode.

4.6.1 Fault

The Fault signal is a TTL-Level output referenced to the unit’s Digital Ground. When a fault condition is detected, the unit will internally pull this signal to about +5V using a 10 Kohm resistor. When a fault condition is not detected, the unit will sink up to 8 mA to Digital Ground. For convenience, digital ground is located at pin 14 of the same connector.

4.6.2 TTL Input

The TTL Input signal is a TTL-Level input referenced to the unit’s Digital Ground. The signal is internally pulled to about +5V via a 680 Ω resistor in series with the photodiode of an optical isolator integrated circuit. This is a general purpose input which can be monitored via software (see TEC:TTL:IN? command) and used for internal/external event synchronization. For convenience, digital ground is located at pin 15 of the same connector.

CAUTION

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4.6.3 TTL Output

The TTL Output signal is a TTL-Level output referenced to the unit’s Digital Ground. This signal is driven by an open-collector transistor output internally pulled to +5V via a 1 k Ohm resistor. This is a general purpose output which can be set via software (see TEC:TTL:OUT command) and used for internal/external event synchronization. For convenience, digital ground is located at pin 16 of the same connector.

4.6.4 LDD Current Monitor Output / Current Monitor Output (Return)

The LDD Current Monitor Output and LDD Current Monitor Output (Return) signals are a differential analog output loosely coupled to the unit’s Laser Diode Analog Ground. These signals allow the user to monitor the Model 6100 Laser Diode Driver subsystem’s output current using an oscilloscope or similar instrument. The output range is 0 to 10 V, which corresponds to the output current range of 0 to Maximum Current.

4.6.5 LDD Voltage Monitor Output / Voltage Monitor Output (Return)

The LDD Voltage Monitor Output and LDD Voltage Monitor Output (Return) signals are a differential analog output loosely coupled to the unit’s Laser Diode Analog Ground. These signals allow the user to monitor the voltage across the user’s laser diode using an oscilloscope or similar instrument. The default is to report the voltage at the Model 6100 Laser Diode Driver subsystem’s output connector. Alternatively, the voltage across the LD Cathode Sense / LD Anode Sense signals will be reported if this has been previously selected by a command received via USB interface. The output range is 0 to the Maximum Compliance Voltage.

4.6.6 LD Cathode Sense / LD Anode Sense

The LD Cathode Sense and LD Anode Sense signals are a differential analog input loosely coupled to the unit’s Laser Diode Analog Ground.

Normally, the unit will measure and monitor the voltage drop at the rear panel output connector using connections within the instrument, but this measurement will not reflect the actual voltage drop across the user’s laser diode due to the voltage drop in the wiring between the unit and the user’s laser diode.

The LD Cathode Sense and LD Anode Sense signals are provided so that the unit can measure and monitor the voltage drop across the laser diode. To select these signals for voltage sensing, rather than the Model 6100 Laser Diode subsystem connector pins, the unit must be commanded by an external

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computer to select these signals via the USB interface. (See the HWCONFIG command in Section 5.5)

These signals may be left unconnected if they are not selected.

4.6.7 Analog Input / Analog Input (Return)

The Analog Input and Analog Input (Return) signals are a differential analog input loosely coupled to the unit’s Laser Diode Analog Ground. This input allows the user to bring in a voltage signal (0 to 10 V) for monitoring by the instrument; the signal is sampled at 100Hz. LIV characterization is one of the typical applications where this input can be used. For this application, the analog input can be from an optical power meter representing a laser diode’s optical power.

4.6.8 Chassis Ground

For convenience, the Model 6100 has a chassis ground connection on the I/O Signals connector.

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5 Computer Interfacing

5.1 General Guidelines

The Model 6100 Laser Diode and Temperature Controller has a USB interface to receive commands from, and send responses to, a host PC. The commands supported by the instrument can be divided into the following two categories: commands that cause it to take a desired action, and commands (queries) that cause it to return a stored value.

Query commands must end with a question mark (?). It is recommended that when a query command is sent, the response to that command from the instrument be read before issuing any other command.

Set commands, on the other hand, are used to configure/setup the instrument for a desired mode of operation. These commands take at least one parameter. The subsequent sections in this chapter detail the communication protocols supported by the instrument.

5.2 Computer Interface Terminology

Listed below are the key abbreviations and concepts used in the command reference section of this manual.

5.2.1 <…> Delimiting Punctuation

For the purposes of this manual, any string enclosed by <…> is considered to be a command, a string or numerical argument. The punctuation <…> is used to symbolize the typographic limits of the command, string or argument in question.

5.2.2 <CR> Carriage Return

The ASCII encoded byte 13 in decimal. (0D hex)

5.2.3 <LF> Line Feed

The ASCII encoded byte 10 in decimal. (0A hex)

5.2.4 (;) Semicolons

Semicolons are used to separate commands within a single transmission (concatenation).

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5.2.5 Command Termination

All the commands sent to the driver must be terminated by a <CR><LF> sequence.

5.2.6 Response Termination

All the responses from the driver are terminated by a <CR><LF> sequence.

5.3 Controller Operation Mode

The Temperature Controller supports two modes of operation: LOCAL and REMOTE. The instrument will be in LOCAL mode, by default, following a power reset. In this mode, setpoint and output current limit values can be adjusted by turning the knob on front panel of the instrument. Output can be turned ON and OFF by pressing the output switch. Please refer the “System Operation” chapter for a detailed description on how to accomplish these tasks. When it is in REMOTE mode, knob control is disabled; setpoint and other settings can be adjusted only by issuing appropriate commands from a host PC. The REMOTE or LOCAL status indicator character can be found in the LCD display.

By default, the instrument enters REMOTE mode when it receives any command through USB communication interface. It can be setup to enter this state on any set command only by setting the appropriate bit in configuration register (refer “HWCONFIG” command). The instrument can be put back in LOCAL mode by issuing “LOCAL” command.

5.4 USB Communication

The instrument is designed to communicate with a host PC via a standard USB interface. Before connecting the instrument to the USB interface the user should install the application included in the software CD that accompanies the Temperature Controller. The application automatically installs the right USB drivers. Communication can be done through this interface by using the application or by developing software in the user’s preferred programming language. The software CD contains communication drivers and example programs in the following programming languages: LabVIEW and C#.NET

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5.5 Commands and Queries

There are two types of device commands: commands that cause the instrument to take a desired action, and queries that return a stored value or state of the instrument. Queries must end with a question mark (?), while commands may require parameter(s) to follow:

TEC:LIMit:Ite 10.00

For example, the value “10.00” in the command TEC:LIMit:Ite 50.00 sets the output current limit at 10.00. The command/query MUST contain all of the letters shown in upper-case; lower-case letters in the commands are optional, and may be used for clarity.

The commands may be sent to the instrument in either upper or lower case or in any combination. For example, the following commands are equal:

TEC:LIMit:ITE 10.00

TEC:LIM:ITE 10.00

tec:LIM:ITE 10.00

Tec:Lim:Ite 10.00

COMMAND EXECUTION:

The controller interprets the commands in the order they are received and executes them sequentially. If a set of commands have to be executed closer to each other, these commands can be sent to the controller simultaneously by creating a command string with semicolon (;) used as a command separator. The command string length should not exceed 50 characters. In the example shown below, a command string was created with semicolon separating 5 queries. The controller responds to this command string with a response that has 5 values using a comma (,) as a separator.

COMMAND STRING:

TEC:OUT?;TEC:SET:I?;TEC:ITE?;TEC:VTE?

INSTRUMENT RESPONSE:

0, 5.0,0.0,0.00

COMMAND TERMINATION:

All commands sent to the instrument must be terminated by <Carriage Return><Line Feed>.characters. All responses sent out by the instrument are terminated by the same characters.

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Commands and Queries Summary Table

Command Syntax Command Description Remarks

*IDN? *RCL

*RST *SAV

*STB?

ADDRess ADDRess? BEEP

BEEP? BRIGHT BRIGHT? ERRors? ERRSTR? HWCONFIG HWCONFIG? LOCAL LOCKOUT LOCKOUT? ONDELAY ONDELAY? LASer:ANALOG:VOLT? LASer:BW LASer:BW? LASer:CALMD (CALPD) LASer:CALMD (CALPD)? LASer:COND? LASer:LDI (I) LASer:LDI (I)? LASer:LDV? LASer:LIMit:LDI (I) LASer:LIMit:LDI (I)? LASer:LIMit:LDV LASer:LIMit:LDV? LASer:LIMit:MDI (IPD) LASer:LIMit:MDI (IPD)?

LASer:LIMit:MDP (Ppd) LASer:LIMit:MDP (Ppd)?

LASer:LIV:COUNT? LASer:LIV:ENable LASer:LIV:ENable?

Identification string query Recall settings Restore instrument to setup

Reset instrument Save instrument’s settings Save instrument’s current

Status Byte Query Returns “error message

Controller USB address set Controller USB address query Turns the beeper on or off, or beeps

once Beeper status query

Display brightness set Display brightness query Error code query Error string query Hardware configuration set Hardware configuration query Return to local mode Lockout the front panel Front panel lockout state query Output turn-on delay set Output turn-on delay query Measured analog input voltage query LDD bandwidth set LDD bandwidth query Laser photodiode responsivity set Laser photodiode responsivity query Laser condition query Laser current set point Measured laser current query Measured forward voltage query Laser output current limit set Laser output current limit set query Laser forward voltage limit set Laser forward voltage limit query Laser photodiode current limit set Laser photodiode current limit set

query Laser photodiode power limit set

Laser photodiode power limit set query LIV characterization samples query

LIV characterization enable state set LIV characterization enable state

query

state stored in its nonvolatile local memory

settings in its non-volatile local memory

available” status

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LASer:LIV:GETMEAS?

LASer:LIV:SETUP LASer:LIV:SETUP? LASer:MDI (IPD) LASer:MDI (IPD)? LASer:MDP (Ppd) LASer:MDP (Ppd)? LASer:MODE LASer:MODE? LASer:MODE:LDI (I)

LASer:MODE:MDI (IPD)

LASer:MODE:MDP (Ppd)

LASer:MODULATE LASer:MODULATE? LASer:OUTput LASer:OUTput? LASer:PDZERO:ENable

LASer:PDZERO:ENable?

LASer:PDZERO:OFFSET LASer:PDZERO:OFFSET? LASer:RAMP:LDI (I)

LASer:RAMP:LDI (I)? LASer:RAMP:MDI (IPD)

LASer:RAMP:MDI (IPD)?

LASer:RANGE LASer:RANGE? LASer:SET:LDI (I)? LASer:SET:MDI (IPD)?

LASer:SET:MDP (Ppd)?

LASer:TTL:MODE

LASer:TTL:MODE?

LASer:TTL:IN? TEC:COND? TEC:CONST

TEC:CONST? TEC:GAIN:IL TEC:GAIN:IL? TEC:GAIN:KD TEC:GAIN:KD? TEC:GAIN:KI TEC:GAIN:KI? TEC:GAIN:KP TEC:GAIN:KP?

LIV characterization get measurements LIV characterization parameters setup

LIV characterization parameters query Laser photodiode current set point Measured photodiode current query Laser photodiode power set point Measured photodiode power query LDD operation mode set LDD operation mode query Set Constant Current LDD operation

mode Set Constant Photodiode Current LDD operation mode Set Constant Photodiode Power LDD operation mode LDD modulation enable/disable

LDD modulation enable/disable query Laser output enable/disable Laser output enable status query Photodiode feedback offset

enable/disable Photodiode feedback offset enable/disable query Photodiode feedback offset value set

Photodiode feedback offset query Sets the output current ramp

parameters Output current ramp parameters query

Sets the photodiode current ramp parameters Photodiode current ramp parameters query LDD range set

LDD range query Laser current set point query Laser photodiode current set point

query Laser photodiode power set point query LDD TTL pulse out operation mode set LDD TTL pulse out operation mode query LDD TTL input state query

TEC condition register query TEC feedback sensor constants set Select desired sensor before

TEC feedback sensor constants query PID control – integral limit set PID control – integral limit query PID control – derivative gain set PID control – derivative gain query PID control – integral gain set PID control – integral gain query PID control – proportional gain set PID control – proportional gain query

setting constants

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TEC:GAIN:PRESET TEC:GAIN:PRESET? TEC:Ite TEC:Ite? TEC:LIM:Ite TEC:LIM:Ite? TEC:LIM:RHI TEC:LIM:RHI? TEC:LIM:RLO TEC:LIM:RLO? TEC:LIM:THI TEC:LIM:THI? TEC:LIM:TLO TEC:LIM:TLO? TEC:LIM:Vte TEC:LIM:Vte? TEC:MODE TEC:MODE? TEC:MODE:Ite TEC:MODE:R

TEC:MODE:T

TEC:OUTput TEC:OUTput?

TEC:R

TEC:R?

TEC:SENsor TEC:SENsor? TEC:SET:Ite? TEC:SET:R?

TEC:SET:T? TEC:T TEC:T? TEC:THERM TEC:THERM? TEC:Vte?

PID control – preset gains select PID control – preset gains select query Output current setpoint Measured output current query Output current limit set Output current limit query High resistance limit set High resistance limit query Low resistance limit set Low resistance limit query High temperature limit set High temperature limit query Low temperature limit set Low temperature limit query Compliance voltage limit set Compliance voltage limit query TEC operation mode set TEC operation mode query Set operation mode to constant current Set operation mode to constant

resistance/reference Set operation mode to constant temperature TEC output enable/disable status set

TEC output enable/disable status query Constant R (resistance/reference) setpoint Measured R (resistance/reference) query Feedback sensor type set

Feedback sensor type query Constant current setpoint query Constant R (resistance/reference)

setpoint query Constant temperature setpoint query

Constant temperature setpoint Measured temperature query Custom thermistor rating set Custom thermistor rating query Measured compliance voltage query

Select desired sensor before setting setpoint Select desired sensor before querying R value

Select desired sensor before querying setpoint

Table 7 Command Summary

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*IDN?

Description Identification string query.

Syntax *IDN?

Remarks This query will cause the instrument to return an identification string.

Model Name

Firmware Version #

Firmware

Date

Controller Serial #

NEWPORT XXXX vYYY mm/dd/yy, SNZZZZ

*RCL

Description Recall command.

Syntax *RCL Bin

Argument Value Description

Bin 0 Restores factory default settings

1 to 5 Restores settings saved in specified bin

Remarks

This command restores the instrument to the setup states saved in instrument’s non-

volatile flash memory. The parameters that can be restored are:

1. USB address

2. Beeper enable/disable state

3. LCD display brightness

4. Hardware configuration register value

5. Dial (rotary knob) lockout state

6. Measurement screen selection

7. TTL mode

8. Pulse mode

9. Pulse width

10. Pulse frequency

11. LDD mode of operation

12. LDD range

13. LDD bandwidth

14. LDD output enable delay period

15. LDD modulation enable state

16. LDD photodiode responsivity

17. LDD photodiode zero enable state

18. LDD photodiode zero offset value

19. LDD laser diode current setpoint

20. LDD photodiode current setpoint

21. LDD photodiode power setpoint

22. LDD laser diode current limit

23. LDD photodiode current limit

24. LDD photodiode power limit

25. LDD compliance voltage limit

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26. LDD laser diode current ramp parameters

27. LDD photodiode current ramp parameters

28. TEC mode of operation

29. TEC feedback sensor type

30. TEC feedback sensor constants

31. TEC custom feedback thermistor value

32. TEC constant output current setpoint

33. TEC constant R (resistance/reference) setpoint

34. TEC constant temperature setpoint

35. TEC output current limit

36. TEC high resistance limit

37. TEC low resistance limit

38. TEC high temperature limit

39. TEC low temperature limit

40. TEC compliance voltage limit

41. PID control gains (proportional, integral and derivative) and integral limit

See Also LASer:MODE

LASer:MODE:LDI (I)

Description Enter Constant Current mode.

Syntax LASer:MODE:LDI

Remarks The LASer:MODE:LDI command sets the instrument to Constant Current mode.

See Also LASer:MODE

LASer:MODE:MDI (IPD)

Description Enter Constant Photodiode Current mode.

Syntax LASer:MODE:MDI

Remarks The LASer:MODE:MDI command sets the instrument to Constant Photodiode Current

mode.

See Also LASer:MODE

LASer:MODE:MDP (Ppd)

Description Enter Constant Photodiode Power mode.

Syntax LASer:MODE:LDI

Remarks The LASer:MODE:LDI command sets the instrument to Constant Photodiode Power

mode. If this command is sent when the photodiode responsivity is zero, the instrument will automatically switch the mode to Constant Photodiode Current.

See Also LASer:MODE

LASer:MODULATE

Description LDD modulation enable/disable set.

Syntax LASer:MODULATE Value

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Remarks The LASer: MODULATE command sets the laser diode driver modulation

enable/disable state.

Argument Value Description

Value 0 OFF

1 ON