Agilent Technologies 81663A User manual

Agilent Technologies
Agilent 81663A
DFB Laser Source
Module
User’s Guide

Notices
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Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and met.
Manual Part Number
81661-90A15
Edition
Eighth Edition, May 2010
Seventh Edition, December 2007
Sixth Edition, June 2005
Seventh Edition, February 2002
Fourth Edition, August 2001
Third Edition, January 2001
Second Edition, October 2000
First Edition, June 2000
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Agilent DFB Laser Source Module User’s Guide 3
Agilent Technologies Sales and Service Offices
For more information about Agilent Technologies test and
measurement products, applications, services, and for a current
sales office listing, visit our web site:
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4 Agilent DFB Laser Source Module User’s Guide

Agilent DFB Laser Source Module User’s Guide 5
Ta b l e o f C o n t e n t s
Agilent Technologies Sales and Service Offices 3
1 Getting Started with DFB Laser Sources
Safety Considerations 8
Safety Symbols 8
Initial Inspection 8
Line Power Requirements 9
Operating Environment 9
Storage and Shipment 9
Environmental Information 9
Initial Safety Information for the DFB Laser Source Module 10
Laser Safety Labels 10
What is a DFB Laser Source Module? 11
A Description of the Front Panel 11
Optical Output 11
Operation Note 13
Maintaining Wavelength Accuracy Below Maximum Power 13
2Accessories
Recommended Connector Interfaces 16
Wavelength Options 16
3 Performance Tests
Equipment Required 18
Te st R e co r d 1 8
Tes t F ai l u re 1 8
Instrument Specification 18
Performance Test Instructions 19
All Wavelength Tests 19
Wavelength Repeatability Test 19

6 Agilent DFB Laser Source Module User’s Guide
Wavelength Stability Test 20
Te st R e co r d s 2 1
4 Cleaning Information
Safety Precautions 26
Why is it important to clean optical devices? 27
What do I need for proper cleaning? 28
Standard Cleaning Equipment 28
Additional Cleaning Equipment 31
Preserving Connectors 33
Cleaning Instrument Housings 34
Which Cleaning Procedure should I use ? 35
How to clean connectors 36
How to clean connector adapters 38
How to clean connector interfaces 39
How to clean bare fiber adapters 40
How to clean lenses 41
How to clean instruments with a fixed connector interface 42
How to clean instruments with an optical glass plate 43
How to clean instruments with a physical contact interface 44
How to clean instruments with a recessed lens interface 45
How to clean optical devices which are sensitive to mechanical stress and
pressure 46
How to clean metal filters or attenuator gratings 47
Additional Cleaning Information 48
How to clean bare fiber ends 48
How to clean large area lenses and mirrors 48
Other Cleaning Hints 51
5 Specifications
Definition of Terms 54
DFB Source Module Specifications 57
Supplementary Performance Characteristics 57

7
Agilent Technologies
Agilent 81663A DFB Laser Source Module User’s Guide
1
Getting Started with DFB Laser Sources
This chapter introduces the features of the Agilent 81663A DFB
Laser Source Module.

8 Agilent DFB Laser Source Module User’s Guide
1
Safety Considerations
The following general safety precautions must be observed
during all phases of operation, service, and repair of this
instrument. Failure to comply with these precautions or with
specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the
instrument. Agilent Technologies assumes no liability for the
customer’s failure to comply with these requirements.
Before operation, review the instrument and manual, including
the safety page, for safety markings and instructions. You must
follow these to ensure safe operation and to maintain the
instrument in safe condition.
Safety Symbols
The apparatus will be marked with this symbol when it is
necessary for the user to refer to the instruction manual in
order to protect the apparatus against damage.
Hazardous laser radiation.
Initial Inspection
Inspect the shipping container for damage. If there is damage to
the container or cushioning, keep them until you have checked
the contents of the shipment for completeness and verified the
instrument both mechanically and electrically.
The Performance Tests give procedures for checking the
operation of the instrument. If the contents are incomplete,
mechanical damage or defect is apparent, or if an instrument
does not pass the operator’s checks, notify the nearest Agilent
Technologies Sales/Service Office.
WARNING
The WARNING sign denotes a hazard. It calls attention to a
procedure, practice or the like, which, if not correctly performed
or adhered to, could result in injury or loss of life. Do not proceed
beyond a WARNING sign until the indicated conditions are fully
understood and met.
WARNING
To avoid hazardous electrical shock, do not perform electrical
tests when there are signs of shipping damage to any portion of
the outer enclosure (covers, panels, etc.).

1
Agilent DFB Laser Source Module User’s Guide 9
Line Power Requirements
The Agilent 81663A DFB Laser Source Module operates when
installed in the Agilent 8163A/B Lightwave Multimeter,
Agilent 8164A/B Lightwave Measurement System, or
Agilent 8166A/B Lightwave Multichannel System.
Operating Environment
The safety information in the Agilent 8163A/B Lightwave
Multimeter, Agilent 8164A/B Lightwave Measurement System,
and Agilent 8166A/B Lightwave Multichannel System User’s
Guide summarizes the operating ranges for the Agilent 81663A
DFB Laser Source Module. In order for this module to meet
specifications, the operating environment must be within the
limits specified for the mainframe.
Storage and Shipment
The module can be stored or shipped at temperatures between
−40°C and +70°C. Protect the module from temperature
extremes that may cause condensation within it.
Environmental Information
This product complies with the WEEE Directive (2002/96/EC)
marking requirements. The affixed label indicates that you must
not discard this electrical/ electronic product in domestic
household waste.
Product Category: With reference to the equipment types in the
WEEE Directive Annex I, this product is classed as a
"Monitoring and Control instrumentation" product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Agilent office,
or see www.agilent.com/environment/product/ for more
information
WARNING
You MUST return instruments with malfunctioning laser modules
to an Agilent Technologies Service Center for repair and
calibration.

10 Agilent DFB Laser Source Module User’s Guide
1
Initial Safety Information for the DFB Laser Source Module
The laser sources specified by this user guide are classified
according to IEC 60825-1 (2001)
The laser sources comply with 21 CFR 1040.10 except for
deviations pursuant to Laser Notice No. 50, dated 2001-July-26.
Laser Safety Labels
Laser class 1M label
Figure 1 Class 1M Safety Label - Agilent 81663A
A sheet of laser safety labels is included with the laser module
as required. In order to meet the requirements of IEC 60825-1
we recommend that you stick the laser safety labels, in your
language, onto a suitable location on the outside of the
instrument where they are clearly visible to anyone using the
instrument.
Tab l e 1 DFB Laser Source Module Safety Information
Agilent 81663A
Laser type CW DFB Laser
with built-in isolator
Wavelength range 1300 to 1650 nm
see display
Max. CW output power* <28 mW
Beam waist diameter 9 µm
Numerical aperture 0.1
Laser Class according to IEC 60825-1 (2001)- International 1M
Max. permissible CW output power 163 mW
* Max. CW output power is defined as the highest possible optical power that the laser
source can produce at its output connector