MOGlabs MSA Manuale utente

Ampliﬁed laser system

Model MSA – internal seed

Model MOA/MOA(L)/MOA(C) – external seed

Revision 2.00

Limitation of Liability

MOG Laboratories Pty Ltd (MOGLabs) does not assume any liability aris-

ing out of the use of the information contained within this manual. This

document may contain or reference information and products protected by

copyrights or patents and does not convey any license under the patent

rights of MOGLabs, nor the rights of others. MOGLabs will not be liable

for any defect in hardware or software or loss or inadequacy of data of

any kind, or for any direct, indirect, incidental, or consequential damages

in connections with or arising out of the performance or use of any of its

products. The foregoing limitation of liability shall be equally applicable

to any service provided by MOGLabs.

part of this publication may be reproduced, stored in a retrieval system,

or transmitted, in any form or by any means, electronic, mechanical, pho-

tocopying or otherwise, without the prior written permission of MOGLabs.

Contact

For further information, please contact:

MOG Laboratories P/L

49 University St

Carlton VIC 3053

AUSTRALIA

+61 3 9939 0677

[email protected]

MOGLabs USA LLC

419 14th St

Huntingdon PA 16652

USA

+1 814 251 4363

www.moglabs.com

Preface

The MOGLabs optical ampliﬁer laser system provides up to 6 W of tun-

able highly coherent optical radiation for atomic cooling, Bose-Einstein

condensation, ion trapping, and other spectroscopic applications. It re-

produces the optical spectrum of the input seed laser, maintaining the

linewidth while increasing the output power by up to 400 times (+26 dB).

It can be conﬁgured as ampliﬁer only (MOA) or with seed laser (MSA). Con-

ﬁgurations may include input and/or output ﬁbre coupling, and input and

output Faraday isolators. The MOGLabs DLC and LDD drivers are ideally

suited for operating the seed and ampliﬁer components of the ampliﬁer

system.

We hope that the MOGLabs optical ampliﬁer system can work well for your

application. We are proud of our products and continuously improving

them. Please let us know if you have any suggestions for enhancement of

the product or this document, so that we can make life in the lab better

for all.

MOGLabs, Melbourne, Australia

www.moglabs.com

Safety Precautions

Your safety and the safety of your colleagues depends on careful atten-

tion to proper operation of this product. Please read the following safety

information before attempting to operate. Please note several speciﬁc

and unusual cautionary notes before using the MOGLabs MSA and MOA,

in addition to the safety precautions that are standard for any electronic

equipment. The directions here apply to both MSA and MOA (ampliﬁer-

only) conﬁgurations except where explicitly stated otherwise.

WARNING

Do not operate the ampliﬁer above the Maximum current, unseeded

without appropriate input seed. Operation exceeding that condition

can cause fatal structural degradation of the TA diode. Refer to the

Maximum current, unseeded speciﬁed in the ampliﬁer test report.

CAUTION

USE OF CONTROLS OR ADJUSTMENTS OR

PERFORMANCE OF PROCEDURES OTHER THAN THOSE

SPECIFIED HEREIN

MAY RESULT IN HAZARDOUS RADIATION EXPOSURE

Laser output from the MSA and MOA can be dangerous. Please ensure that

you implement the appropriate hazard minimisations for your environment,

such as laser safety goggles, beam blocks, and door interlocks. MOGLabs

takes no responsibility for safe conﬁguration and use of the laser. Please:

•Avoid direct exposure to the output beams, both from the injection

seed input aperture and the ampliﬁed output aperture.

•Avoid looking directly into either beam.

iii

•Note the safety labels (examples shown in ﬁgure 1) and heed their

warnings.

•The MSA or MOA must be operated with a controller with keyswitch

interlock. The MSA must not be powered unless the keyswitch is

inserted and switched on. It should not be possible to remove the

keyswitch without turning oﬀ the power to the MSA or MOA.

•When the seed laser and ampliﬁer are switched on, there should

be a delay of two seconds before the emission of laser radiation,

mandated by European laser safety regulations (IEC 60825-1).

WARNING Do not operate the ampliﬁer without suﬃcient seed laser input. It is

important that an injection seed laser beam is coupled into the ta-

pered ampliﬁer (TA) diode so that most of the electrical input energy

is converted to optical output rather than lost as heat, which would

damage the TA diode.

NOTE The MOGLabs MSA and MOA are designed for use in scientiﬁc re-

search laboratories. They should not be used for consumer or medical

applications.

Protection Features

The MOGLabs MSA and MOA include a number of features to protect you

and the device. They should be used with a power supply that provides

additional safety features such as key lock operation, current limit, tem-

perature limit, cable continuity and short-circuit detection, soft-start and

turn-on delay.

Protection relay When the power is oﬀ, or the temperature controller is

oﬀ, the ampliﬁer diode is shorted via a normally-closed relay.

LEDsSeparate LED indicators illuminate when the seed laser and ampliﬁer

diode current supplies are enabled.

Label identiﬁcation

The International Electrotechnical Commission laser safety standard IEC

60825-1:2007 mandates warning labels that provide information on the

wavelength and power of emitted laser radiation, and which show the

aperture where laser radiation is emitted. Figures 1 and 2 show examples

of these labels and their location on the MSA and MOA.

Model number: MSA003

Serial number: A41706001

Manufactured: JUNE 2017

Complies with 21 CFR 1040.10, and 1040.11 except for

deviations pursuant to Laser Notice No.50, dated 24 June 2007

MOG Laboratories Pty Ltd, 49 University St

Carlton VIC 3053, AUSTRALIA

AVOID EXPOSURE

VISIBLE AND INVISIBLE

LASER RADIATION IS

EMITTED FROM THIS APERTURE

Aperture label engraving

US FDA compliance

Warning and advisory label

Class 4

IEC 60825-1:2007

AS/NZS 2211.5:2006

VISIBLE LASER RADIATION

AVOID EYE OR SKIN EXPOSURE TO

DIRECT OR SCATTERED RADIATION

CLASS 4 LASER PRODUCT

Wavelength Max Power

665 − 675nm 600mW

Figure 1: Warning advisory and US FDA compliance labels.

IEC 60825-1:2007

AS/NZS 2211.5:2006

VISIBLE LASER RADIATION

AVOIDEYE OR SKIN EXPOSURE TO

DIRECT OR SCATTEREDRADIATION

CLASS 4 LASER PRODUCT

Wavelength Max Power

665 − 675nm 600mW

IEC 60825-1:2007

AS/NZS 2211.5:2006

VISIBLE LASER RADIATION

AVOIDEYE OR SKIN EXPOSURE TO

DIRECT OR SCATTEREDRADIATION

CLASS 4 LASER PRODUCT

Wavelength Max Power

665 − 675nm 600mW

Emission indicators

Model number:

MSA003

Serial number:

A41706002

Manufactured:

JUNE 2017

Complies with 21 CFR 1040.10, and 1040.11 except for

deviations pursuant to Laser Notice No.50, dated24 June 2007

MOG Laboratories Pty Ltd, 49 University St

Carlton VIC 3053, AUSTRALIA

Model number: MSA003

Serial number: A41706002

Manufactured: JUNE 2017

Complies with 21 CFR 1040.10, and 1040.11 except for

deviations pursuant to Laser Notice No.50, dated 24 June 2007

MOG Laboratories Pty Ltd, 49 University St

Carlton VIC 3053, AUSTRALIA

FDA compliance

and serial number

Laser warning advisor

Figure 2: Schematic showing location of warning labels compliant with Inter-

national Electrotechnical Commission standard IEC 60825-1:2007, and US FDA

compliance label. Emission indicator for seed laser (left) and ampliﬁer (right).

Aperture label engraved on front and rear apertures; warning advisory label on

right hand side, compliance label left hand side near exit aperture.

fbookmark[0]Contentsanchor

Contents

Preface i

Safety Precautions iii

1 Introduction 1

2 Safety features 5

2.1 Interlock .............................. 5

2.2 Photodiode safety cutout . . . . . . . . . . . . . . . . . . . . 5

3 First light 7

4 MSA: internal seed alignment 9

4.1 Small adjustment to seed alignment . . . . . . . . . . . . . . 9

4.2 Substantial adjustment to seed alignment . . . . . . . . . . 10

5 MOA: external seed alignment 19

5.1 Seedalignment.......................... 19

5.2 Reverse propagating TA diode beam collimation . . . . . . . 24

6 Output beam optimisation 27

6.1 Procedure for output beam optimisation . . . . . . . . . . . . 28

7 Fibre coupling 31

7.1 Fibre alignment touch-up . . . . . . . . . . . . . . . . . . . . 33

7.2 Fibre alignment procedure . . . . . . . . . . . . . . . . . . . 35

7.3 Fibre coupler collimation . . . . . . . . . . . . . . . . . . . . 38

7.4 Troubleshooting.......................... 39

8 Diode replacement 41

A Electrical connections 45

vii

viii Contents

A.1 Ampliﬁer headboard: MOA,MSA ................ 45

A.2 Connectorpinouts ........................ 48

B Chassis dimensions 51

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