Ocean Optics Multimode Spectrum User Manual

Multimode Spectrum Stabilized Laser
Subsystem

Installation and Operation Manual

Document Number LASER-785-IP-02-1208

Office: Ocean Optics, Inc. World Headquarters

830 Douglas Ave., Dunedin, FL, USA 34698

Phone [phone]
Fax [phone]

8 a.m.– 8 p.m. (Mon-Thu), 8 a.m.– 6 p.m. (Fri) EST

E-mail: [e-mail] (General sales inquiries)

[e-mail] (Questions about orders)
[e-mail] (Technical support)

Protective Eye Wear Should Be Worn
When Using This Instrument - Intense
Radiation Present

WARNING

See Important Safety Notices inside.

Additional
Offices:

Ocean Optics Asia

666 Gubei Road, Kirin Tower, Suite 601B, Changning District,
Shanghai, PRC. 200336

Phone [phone]

Fax [phone]
E-Mail [e-mail]

Ocean Optics Europe

Sales and Support Center
Geograaf 24, 6921 EW DUIVEN, The Netherlands

Phone [phone]

Fax [phone]
E-Mail

[e-mail]

Regional Headquarters
Maybachstrasse 11
73760 Ostfildern

Phone [phone]
Fax [phone]
E-Mail [e-mail]

Copyright © 2008 Ocean Optics, Inc.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, by any means, electronic,
mechanical, photocopying, recording, or otherwise, without written permission from Ocean Optics, Inc.
This manual is sold as part of an order and subject to the condition that it shall not, by way of trade or otherwise, be lent, re-sold, hired out or
otherwise circulated without the prior consent of Ocean Optics, Inc. in any form of binding or cover other than that in which it is published.

Trademarks

Microsoft, Windows, Windows 95, Windows 98, Windows Me, Windows NT, Windows 2000, Windows XP and Excel are either registered
trademarks or trademarks of Microsoft Corporation.

Limit of Liability

Every effort has been made to make this manual as complete and as accurate as possible, but no warranty or fitness is implied. The information
provided is on an “as is” basis. Ocean Optics, Inc. shall have neither liability nor responsibility to any person or entity with respect to any loss or
damages arising from the information contained in this manual.

W

Important Safety Notices

The laser described here is safe to operate, provided the user pays attention to all safety warnings:

1. Post warnings in the area of the laser beam to alert those present.

2. Keep all unauthorized personnel out of the area where the laser is operated.

3. Whenever the laser is running and the beam is not in use, it is good operating practice to

mechanically block the path.

4. Never look directly into the laser source or scattering laser light from any reflective surface.

Never sight down the beam into the source.

5. Maintain experimental setup at low heights to prevent inadvertent beam-eye contact.

6. As a precaution against accidental exposures to the output beam or its reflection, operators should

wear laser safety glasses attenuated to the wavelength being generated.

Sources for additional information and assistance on laser safety are the following:

Center for Device and Radiological Health
Office of Compliance
2098 Gaither Rd.
Rockville, MD 20850
Tel: [phone]
Fax: [phone]

Laser Institute of America
12424 Research Parkway, Suite 125
Orlando, FL 32826
Tel: [phone]
Fax: [phone]

Notice for OEM Laser Part: This laser module is designed for use as a component (or replacement)

part and is thereby exempt from 21 CFR1040.10 and 1040.11 provisions.

DANGER

INVISIBLE LASER RADIATION
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION

EYE PROTECTION REQUIRED

POWER GREATER THAN 350 m

CLASS IIIB

LASER-785-IP -02-1208 A

Table of Contents

About This Manual .......................................................................................................... iii

Document Purpose and Intended Audience..............................................................................iii

Document Summary.................................................................................................................. iii

Product-Related Documentation ............................................................................................... iii

Upgrades......................................................................................................................... iii

Chapter 1: Introduction ......................................................................1

Overview ......................................................................................................................... 1

Features .......................................................................................................................... 2

Additional Equipment Required....................................................................................... 2

Chapter 2: Set-up and Operation.......................................................3

Overview ......................................................................................................................... 3

Set-up.............................................................................................................................. 4

Set-up for Manual Operation..................................................................................................... 5

Set-up for Remote Operation .................................................................................................... 5

Operation......................................................................................................................... 5

Manual Operation ...................................................................................................................... 6

Remote Operation ..................................................................................................................... 6

Appendix A: Specifications................................................................7

Index.....................................................................................................9

LASER-785-IP -01-1208 i

Table of Contents

ii LASER-785-IP -01-1208

About This Manual

Document Purpose and Intended Audience

This document provides you with information to get your laser set up and operating.

Document Summary

Chapter Description

Chapter 1: Introduction

Chapter 2: Set-up and Operation Provides instructions for setting up and operating the

Appendix A: Specifications Provides a list of product specifications.

Contains a list of product features and package
contents.

laser.

Product-Related Documentation

You can access documentation for Ocean Optics products by visiting our website at

http://www.oceanoptics.com. Select Technical → Operating Instructions, then choose the appropriate

document from the available drop-down lists. Or, use the Search by Model Number field at the bottom
of the web page.

You can also access operating instructions for Ocean Optics products on the Software and Technical
Resources CD included with the system.

Engineering-level documentation is located on our website at Technical → Engineering Docs.

Upgrades

Occasionally, you may find that you need Ocean Optics to make a change or an upgrade to your system.
To facilitate these changes, you must first contact Customer Support and obtain a Return Merchandise
Authorization (RMA) number. Please contact Ocean Optics for specific instructions when returning a
product.

LASER-785-IP -01-1208 iii

About This Manual

iv LASER-785-IP -01-1208

Chapter 1

Introduction

Overview

The Multimode Spectrum Stabilized Laser Subsystem features high output power with narrow spectral
bandwidth. The laser’s stabilized peak wavelength remains “locked” regardless of case temperature (–10
to +55 degrees C). Devices can be spectrally tailored to suit application needs and offer side mode
suppression ratios (SMSRs) better than 40 dB, thereby providing extremely high signal to noise ratio and
making these sources ideal for Raman spectroscopy and pump laser applications. The laser is integrated
with high performance laser drive and temperature control electronics in a compact package weighing less
than 113.4 grams.

Multimode Spectrum Stabilized Laser Subsystem

LASER-785-IP -01-1208 1

1: Introduction

Typical 785 nm Laser Spectrum (SMSR > 40 dB)

Features

The laser provides the following features:

• Up to 400 mW Fiber Coupled Output Power

• Spectral Linewidth < 0.15 nm

• Temperature Stabilized Spectrum (< 0.007 nm/0C)

• Low Power consumption (< 5.5 W)

• 40 dB SMSR Typical

• 7.6 cm x 6.4 cm x 1.8 cm package weighing less than 113.4 g

Additional Equipment Required

The following equipment, available from Ocean Optics, is also required to use your laser:

 Safety goggles (R-2001-GL goggles from Ocean Optics are recommended)

2 LASER-785-IP -01-1208

Chapter 2

Set-up and Operation

Overview

This section provides instructions for setting up and operating the laser. Read all instructions and
warnings carefully before attempting to install and operate your laser.

Laser Rear View

LASER-785-IP -01-1208 3

2: Set-up and Operation

Set-up

Refer to the following figure and table of pinouts while setting up your laser.

Laser Mechanical Drawing

Module Pinouts

Pin # Symbol Description

1 NC Not connected

2 V set ENABLE Enables “LD SET” on Pin 8 when connected to Ground. If left open or set to 3 –

5 Volt, output power defaults to internally preset value.

3 T SENS

1000 Ohm RTD sensor (with reference to Ground) to monitor module case.

4 T SENS

5 GND Ground

6 + 5V 4.9 to 5.1 Volt; 1 Ampere

7 ENABLE Tie to GND to disable laser output. Keep unconnected or apply 3 – 5 Volt to

enable laser output.

8 LD SET Apply 0 to 1 Volt to control optical output power. Pin 2 must be grounded to

enable this option.

9 PD+ Photodiode anode

10 PD- Photodiode cathode

4 LASER-785-IP -01-1208

2: Set-up and Operation

Set-up for Manual Operation

► Procedure

1. Mount laser module onto a suitable heat sink using corner mounting holes.

2. Ensure that external laser enable switch on sidewall of laser module is in the Off (O) position.

3. Plug 5 V DC power supply into wall outlet and then into 5 V DC power input jack on back of

module.

Set-up for Remote Operation

► Procedure

1. Mount laser module onto a suitable heat sink using corner mounting holes.

2. Ensure that external laser enable switch on sidewall of laser module is in the Off (O) position.

3. Plug the prewired 10 pin Molex connector into the laser module.

4. Ensure that external 5 V DC power to the module is off (pin 6) and the Laser enable (Pin 7) is

tied to ground.

Note

To use the remote modulation option on this module, connect Pin 2 to Ground and bias
LD SET on Pin 8 between 0 and 1 V to adjust laser output power from 0 to max.

Operation

Read the following warning before attempting to use the laser:

WARNINGS

DO NOT LOOK DIRECTLY INTO THE LASER. LASER RADIATION IS
HAZARDOUS TO THE EYES.

AVOID DIRECT EXPOSURE TO THE BEAM.

000-10000-080-02-0505 5

2: Set-up and Operation

Manual Operation

To turn laser on: Flip the external laser toggle switch mounted on the module to the ON (I) position.

To turn laser off: Flip the external laser toggle switch mounted on the module to the Off (I) position.

Remote Operation

To Turn Laser ON

► Procedure

1. Toggle external laser enable switch mounted on side wall of module to the ON (I) position.

2. Apply power (5 V DC) to Pin 6.

3. Break connection to ground on Pin 7

To Turn Laser Off

► Procedure

4. Tie Pin 7 (Enable ) to Ground.

5. Turn off 5 V power supply to Pin 6.

To Adjust Power

This allows you to smoothly adjust the laser's output power levels from 0 to max power by applying the
appropriate voltage bias onto Pin 8.

Procedure

►

1. Ground Pin 2.

2. Apply a 0 - 1 V DC voltage bias onto Pin 8.

6 LASER-785-IP -01-1208

Specifications

Specifications Criteria

Optical

Optical Power Output > 350mW (375 mW typical)

Output Power Stability +/- 1%

Wavelength 785 nm (+/- 1 nm)

3 dB Bandwidth (FWHM) Typical: 0.12 nm Max: 0.20 nm

Appendix A

Spectral Line Width <0.2nm, FWHM

Wavelength Stability +/- 0.1 nm (-20 to 55ºC) over temperature range and

lifetime

Optical Signal-to-Noise Ratio (SMSR) Typical: 45 dB Min: 35 dB

Output Fiber

Connector SMA 905 (FC/PC optional)

Electrical

Supply Voltage Typical: 5V Min: 4.9V Max: 5.1V

Power Consumption Typical: 3.5W Max: 5.5W

Photodiode Current 30 µA

Case Temperature Sensor 1000 Ohm at 0º C (RTD)

Laser Setpoint Control (LD SET) Typical: 0.9V Min: 0 V Max: 1.0 V (when Pin 2 is

Warm-up Time 10 sec. from cold start; 1.5 sec. from warm start

Connector 10-pin, Molex #53014-1010 (mating connector:

Mechanical

100-105/125 µm@ 0.22NA (or Free Space output)

grounded)

51004-1000)

Physical Dimensions 7.6 cm x 6.4 cm x 1.8 cm

Weight 100 grams

Case Material Anodized aluminum

LASER-785-IP -01-1208 7

A: Specifications

Specifications Criteria

Environmental

Cooling Airfllow 100 LFM with attached heatsink

Operating Temperature –10 to 55oC case temperature

Storage Temperature -20 to 80 oC

8 LASER-785-IP -01-1208

Index

D

document

audience, iii
purpose, iii
summary, iii

E

equipment

required, 2

F

features, 2

I

introduction, 1

L

laser

turn off

manual, 6
remote, 6

turn on

manual, 6
remote, 6

laser power

adjust in remote operation, 6

M

O

operation, 5

manual, 6
remote, 6

P

pinouts, 4
power

adjust in remote operation, 6

product-related documentation, iii

R

rear panel, 3
remote operation, 6

adjust laser power, 6
set-up, 5
turn laser off, 6
turn laser on, 6

required equipment, 2

S

set-up, 4

manual operation, 5
remote operation, 5

specifications, 7

electrical, 7
environmental, 8
mechanical, 7
optical, 7

manual operation, 6

set-up, 5

mechanical drawing, 4

LASER-785-IP -01-1208 9

upgrades, iii

U

Index

10 LASER-785-IP -01-1208