Agilent Technologies 11896A Manual

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User
,Programming and Service Guide
Agilent 11896A
Polarization Controller

Notice
The information contained in this document is subject to change without
notice
.
Agilent T
echnologies makes no warranty of any kind with regard to
this material, including, but not limited to
,the implied warranties of
merchantability and tness for aparticular purpose
.Agilent T
echnologies
shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance
,or use
of this material.
Agilent P
art Number: 11896-90011
Printed in US
AApril 2000
c
 Copyright Agilent T
echnologies 2000
All Rights Reserved. Reproduction, adaptation, or translation without prior
written permission is prohibited, except as allowed under the copyright laws
.
1400 F
ountaingrove P
arkway, Santa Rosa, CA 95403-1799, US
A

Certication
Agilent Technologies certies that this product met its published specications
at the time of shipment from the factory
.Agilent T
echnologies further
certies that its calibration measurements are traceable to the United States
National Institute of Standards and T
echnology
,to the extent allowed by
the Institute's calibration facility, and to the calibration facilities of other
International Standards Organization members
.
iii

W
arranty
This Agilent T
echnologies instrument product is warranted against defects in
material and workmanship for aperiod of one year from date of shipment.
During the warranty period, Agilent T
echnologies will, at its option, either
repair or replace products which prove to be defective
.
F
or warranty service or repair
,this product must be returned to aservice
facility designated by Agilent T
echnologies
.Buyer shall prepay shipping
charges to Agilent T
echnologies and Agilent T
echnologies shall pay shipping
charges to return the product to Buyer
.However
,Buyer shall pay all shipping
charges
, duties
,and taxes for products returned to Agilent T
echnologies from
another country
.
Agilent T
echnologies warrants that its software and rmware designated by
Agilent T
echnologies for use with an instrument will execute its programming
instructions when properly installed on that instrument. Agilent T
echnologies
does not warrant that the operation of the instrument, or software
,or
rmware will be uninterrupted or error-free
.
Limit
a
tion of W
arranty
The foregoing warranty shall not apply to defects resulting from improper
or inadequate maintenance by Buyer
,Buyer-supplied software or
interfacing, unauthorized modication or misuse
,operation outside of the
environmental specications for the product, or improper site preparation
or maintenance
.
NO OTHER W
ARRANTY IS EXPRESSED OR IMPLIED
.A
GILENT
TECHNOLOGIES SPECIFICALL
YDISCLAIMS THE IMPLIED W
ARRANTIES
OF MERCHANT
ABILITY AND FITNESS FOR AP
ARTICULAR PURPOSE.
Ex
clusive Remedies
THE REMEDIES PRO
VIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE
REMEDIES
.A
GILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR
ANY DIRECT, INDIRECT
, SPECIAL, INCIDENT
AL, OR CONSEQUENTIAL
DAMAGES, WHETHER B
ASED ON CONTRA
CT
, TORT
, OR ANY OTHER
LEGAL THEORY
.
iv

Assistance
Product maintenance agreements and other customer assistance agreements
are available for A
gilent T
echnologies products.
F
or any assistance, contact your nearest A
gilent T
echnologies Service Oce
.
v

Safety Symbols
The following safety symbols are used throughout this manual. F
amiliarize
yourself with each of the symbols and its meaning before operating this
instrument.
CAU
TION
The
caution sign denotes a hazard to the instrument. It calls attention to a
procedure which, if not correctly performed or adhered to
,could result in
damage to or destruction of the instrument. Do not proceed beyond a
caution
sign until the indicated conditions are fully understood and met.
WARNING
The
warning
sign denotes alife-threatening hazard. It calls attention to a
procedure 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.
Instruction
Manual
L
The
instruction manual
symbol. The product is marked with this symbol when it is necessary
for the user to refer to the instructions in the manual.
vi

General Safety Considerations
WARNING
Before this instrument is switched on
,make sure it has been properly
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor
,inside or
outside the instrument, or disconnection of the protective earth terminal
can result in personal injury
.
WARNING
This is aSafety Class Iproduct (provided with aprotective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in asocket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
instrument is likely to make the instrument dangerous
.Intentional
interruption is prohibited.
WARNING
There are many points in the instrument which can, if contacted, cause
personal injury
.Be extremely careful.
Any adjustments or service procedures that require operation of the
instrument with protective covers removed should be performed only by
trained service personnel.
WARNING
If this instrument is not used as specied, the protection provided by the
equipment could be impaired. This instrument must be used in anormal
condition (in which all means for protection are intact) only
.
NOTE
Clean the cabinet using adamp cloth only.
vii

How to Use This Manual
This manual provides information about the Agilent 11896A polarization
controller
.
Chapter 1
provides general information and specications for the
controller
Chapter 2
describes how to prepare the polarization controller for
use and how to make ber optic connections
Chapter 3
shows how to manually control the lightwave polarization
controller
Chapter 4
shows how to control the lightwave polarization controller
using a computer
Chapter 5
provides procedures for verifying and servicing the
Agilent 11896A polarization controller
Appendix A
selecting scan rate and measurement time
Appendix B
measurement considerations
Appendix C
provides asample GPIB program
viii

Contents
1. General Information
Description .................. . . .
1-3
Instrumen
tconguration ..............
1-4
Options .................. . .
1-4
Accessories .................. .
1-4
P
olarization-dependen
tloss measuremen
ts ......
1-5
P
o
w
er meter PDL measuremen
tsystem ......
1-5
Sw
ept-w
a
v
elength PDL measuremen
tsystem ....
1-6
Max/min PDL measuremen
tsystem ........
1-8
Theory of Op eration .................
1-10
Specications and Characteristics ...........
1-11
Serial Num
bers .............. . . . ..
1-14
Electrostatic Disc
harge Information ..........
1-15
Reducing ESD damage ...............
1-17
2. Installation and Preparation for Use
Preparing the P
olarization Controller for Use ......
2-3
Initial inspection ... . .............
2-3
Connecting the Agilen
t11896A to a po
w
er source ...
2-4
P
o
w
er requiremen
ts .. . .............
2-4
Chec
king the fuse .. . . . ............
2-4
P
o
w
er cable .................. . .
2-5
T
urning on the Agilen
t11896A ............
2-8
Ligh
tw
a
v
eConnector Care ............. .
2-9
In
tro duction ...................
2-9
Cleaning and handling . . .............
2-11
Denition of terms . . .............
2-11
Handling .............. . . . . . .
2-11
Cleaning ............ . . . . . . . .
2-11
Cleaning non-lensed light
wave connectors . . . . . . .
2-12
Equipment . . . . . . . . . . . . . . . . . . .
2-12
Pro cess . . . . . . . . . . . . . . . . . . . .
2-12
Cleaning light
w
ave adapters . . . . . . . . . . . .
2-13
Equipment . . . . . . . . . . . . . . . . . . .
2-13
Pro cess . . . . . . . . . . . . . . . . . . . .
2-13
Cleaning lensed connections . . . . . . . . . . . .
2-13
Contents-1

Storage .............. . . . . . . .
2-14
Making connections ..............
..
.. 2-15
Summary ................ . . . . .
2-16
Insp ection ............... . . . . .
2-16
Visual inspection .............. . .
2-16
Optical performance testing ......... . . .
2-17
In
tro duction .......... . . . . . . . .
2-17
Insertion loss ........... . . . . . . .
2-17
Return loss ........... . . . . . . . .
2-18
3. Using the Agilent 11896A P
olarization Controller
F
ron
t-P
anel F
eatures . . . . .............
3-3
Error co des .......... . ........
3-5
Rear-P
anel F
eatures .................
3-6
Using the Agilen
t 11896A . . . . ..........
3-7
P
o
w
er-up function . . . . . . ...........
3-8
T
ouse the Man
ual mo de ..............
3-8
T
ocon
tin
uously sw
eep all polarization states .....
3-9
T
oset the scan rate ................
3-9
T
osa
v
ean instrumen
tstate .............
3-10
T
orecall an instrumen
tstate ............
3-10
To use the Local function ..............
3-11
T
odispla
yor c
hange the GPIB address ........
3-11
4. Programming
Changing the GPIB address ....... . . . ..
4-3
T
alking to the Instrumen
t..... . . . ......
4-4
Program Message Syntax . . . . ...........
4-5
Output command . . . . . . ...........
4-5
Device address . . . . . . ............
4-5
Instructions .. . . . . . . . ...........
4-6
Instruction header . . . . . . . . .........
4-6
White space (separator) . .............
4-6
Program data ... . ........... . ...
4-7
Header t
ypes . . . . . . . . . . . . . . . . . . .
4-7
Simple command header .. . . . . . . . . . . .
4-7
Comp ound command header .. . . . . . . . . .
4-8
Common command header . . . . . . . . . . . .
4-8
Combining commands . . . . . . . . . . . . . . .
4-8
Duplicate mnemonics . . . . . . . . . . . . . . .
4-9
Query command . . . . . . . . . . . . . . . . .
4-10
Contents-2

Program header options ............ . .
4-11
Program data syntax rules ..............
. 4-12
Numeric program data ..............
4-12
Program message terminator ............
4-13
Selecting m
ultiple subsystems ............
4-13
Initialization ............ . . . . . ..
4-14
Programming o
v
er GPIB ........ . . . . . . .
4-15
In
terface capabilities .......... . . . . . .
4-15
Command and data concepts ......... . . .
4-15
Addressing ............ . . . . . . . .
4-16
Comm
unicating o
v
er the bus (HP 9000 series 200/300
con
troller) ......... . . . .......
4-17
In
terface select co de (selects in
terface) .......
4-17
Instrumen
taddress (selects instrumen
t) ......
4-17
Loc
k
out ........ . . . . . ........
4-18
Bus commands .......... . . . . . . . .
4-18
Device clear .... . . . ...........
4-18
In
terface clear ... . . . ............
4-18
Common commands .... . . . .........
4-19
*CLS (Clear Status) ..... . .........
4-19
*ESE (Ev
en
tStatus Enable) .. . ........
4-20
*ESR (Ev
en
tStatus Register) ...........
4-21
*IDN (Identication Num
ber) ...........
4-22
*OPC (Operation Complete) ...........
4-22
*R
CL (Recall) . . ...............
4-23
*RST (Reset) . . . ...............
4-23
*SA
V(Sa
ve) ..................
4-23
*SRE (Service Request Enable) ..........
4-24
*STB (Status Byte) ...............
4-25
*TST (T
est) ................ . .
4-26
*W
AI (W
ait) ............... . . .
4-26
Instrumen
tspecic commands ...........
4-27
:ABOR
t....... . . . . . . . . . . . ..
4-27
:INITiate:IMMediate ....... . .......
4-27
:PADDle:POSition . . . . . . . . . . . . . . . .
4-28
:SCAN:RATE . . . . . . . . . . . . . . . . . .
4-29
:SCAN:TIMer . . . . . . . . . . . . . . . . . .
4-29
:SCAN:TIMer:CLEar . . . . . . . . . . . . . .
4-30
:STATus:OPERation :CONDition . . . . . . . . . 4-30
:STATus:OPERation :ENABle . . . . . . . . . .
4-30
:STATus:OPERation :EVENt . . . . . . . . . . .
4-31
Contents-3

:ST
A
T
us:PRESet ........... . . . . .
4-31
:ST
A
Tus:QUEStionable :CONDition ..........4-31
:ST
A
T
us:QUEStionable :ENABle .........
4-32
:ST
A
T
us:QUEStionable :EVENt ..........
4-32
:SYST
em:ERRor ............... .
4-33
:SYST
em:VERSion ........... . . . .
4-34
5. V
erication and Service Information
P
erforming aV
erication Chec
k.. . . . . . . . ...
5-3
V
erify startup ...... . . . . . . . .....
5-3
V
erify the SCAN RA
TE function .. . . . . . . .
5-3
V
erify the LOCAL function .. . . . .......
5-4
V
erify the SA
VE and RECALL functions ..... .
5-4
V
erify the ev
en
ttimer ..............
5-5
If the v
erication c
heck fails . ...........
5-6
V
erifying the Agilent 11896A Specications . . . ....
5-7
Insertion loss ..................
5-7
Return loss ...................
5-8
Ho
wto Return the Agilen
t11896A for Service .....
5-9
P
ac
k
aging ....................
5-9
Instrumen
tshipping preparation pro cedure ......
5-10
Sales and service oces ..............
5-12
Sales and service oces ..............
5-12
Service Information .................
5-14
General information ................
5-14
Serial-n
um
ber information ............
5-14
Safet
yconsiderations ...............
5-14
Reliabilit
yconsiderations ...... . . . . . . .
5-15
Protection from electrostatic disc
harge ...... .
5-15
Required service to ols ....... . . . . . ..
5-16
Adjustmen
tpro cedure ....... . . . . . . . .
5-16
Replacemen
tpro cedures ....... . . . . . . .
5-17
To replace the front-panel assembly . . . . ....
5-17
T
oreplace the polarization assem
bly ..... . ..
5-18
To replace the po
wer supply . . . . . . . . . . .
5-18
To replace the GPIB connector . . . . . . . . . .
5-18
Replaceable parts . . . . . . . . . . . . . . . . .
5-19
Replaceable parts table format . . . . . . . . . .
5-19
Part ordering information . . . . . . . . . . . . .
5-19
Direct mail-order system . . . . . . . . . . . . .
5-20
Direct phone-order system . . . . . . . . . . . .
5-20
Contents-4

Regular orders ............. . . . .
5-20
Hotline orders ................ .. .5-20
A. Choosing the Scan Rate and Measurement Time
Single w
a
v
elength PDL measuremen
ts ..... . . .
A-2
Sw
ept w
a
v
elength PDL measuremen
ts .... . . . .
A
-3
Depolarization application ...... . . . . . . .
A
-4
B
.Measurement Considerations
Ov
erall insertion loss . . . . . . . . ........
B-2
Insertion loss v
ariation with paddle p osition . . . . .
B-3
Optical return loss . . . ..............
B-3
Extinction ratio ....... . ..........
B-4
P
addle angle repeatability.............
B-5
Settling time ...................
B-5
P
addle rotation rates ...............
B-5
Nominal quarter-w
a
v
eplates ......... . . .
B-5
Index
Contents-5

Figures
1-1. Typical application setup using the Agilent 11896A
polarization controller. ................1-3
1-2. Setup for single-wavelength PDL measurements using an
optical power meter
. . ................1-5
1-3. Setup for swept-wavelength PDL measurements using an
optical spectrum analyzer
...............1-6
1-4. Example of swept-wavelength PDL test data. ........1-7
1-5. Setup for single-wavelength max/min PDL measurements
...1-8
1-6. Example of max/min PDL measurement data. .......1-9
1-7. Agilent 11896A polarization controller block diagram. ....1-10
1-8. Example of astatic-safe work station. . ..
..
......1-16
2-1. Checking the fuse
.. ................... 2-5
5-1. Agilent 11896A assembly level replaceable parts
.......5-21
B-1. Block diagram for testing the extinction ratio of the Agilent
11896A. . ..
....................B-4
Contents-6

T
ables
1-1. Performance Specications ................1-12
1-2. Static-Safe A
ccessories ..................1-17
2-1. Accessories Supplied with the Agilent 11896A .......2-3
2-2. Agilent 11896A Power Requirements ...........2-4
2-3. AC Power Cables A
vailable ................ 2-7
4-1. Standard Event Status Enable Register ...........4-20
4-2. Standard Event Status Register ..............4-21
4-3. Service Request Enable Register .............4-24
4-4. Status Byte Register ...................4-25
4-5. Error Messages .....................4-33
5-1. Agilent T
echnologies Service Numbers .... .. .....5-13
5-2. Required Tools ..
................... 5-16
5-3. Assembly-Level Replaceable P
arts .............5-21
A-1. Selecting A
veraging Time
,Scan Rate and Measurement Time .A
-3
Contents-7

Contents

1
General Information

General Information
What you'll nd in this chapter

Adescription of the Agilent 11896A polarization controller.

Alist of options and accessories available
.

Agilent 11896A polarization controller specications and characteristics.

Information about the controller's serial number label.

Information about avoiding damage to the controller from electrostatic discharge
.
1-2

Description
The Agilent 11896A polarization controller provides manual and
automatic polarization state adjustments over awide wavelength range
(1250 to 1600 nm). All possible states of polarization are achieved with
extremely small optical insertion-loss variations (
6
0.002 dB). This
performance combination maximizes measurement accuracy for power
sensitive measurements such as polarization-dependent loss
,gain and
optical/electrical responsitivity because the measurement uncertainty
contributed by the polarization controller is minimized. Atypical application
conguration using the polarization controller is shown in Figure 1-1.
Figure 1-1. T
ypical application setup using the Agilent 11896A polarization controller
.
1-3