HP HP 81553SM User manual

Operating and Programming Manual
HP 81553SM Lightwave
Multimeter Source Module
SERIAL NUMBERS
This manual applies to all instruments.
ABCDE
HP Part No. 81553-90011
Printed in Germany
Second Edition
E0796

> Control Serial Number: Edition 2 applies directly to all instruments.
First Edition : 1st May 1990 : 81553-90011 : E0590
Second Edition : 1st March 1991 : 81553-90011 : E0391 ; 1st April 1992 : 81553-
90011 : E0492 ; 1st February 1994 : 81553-90011 : E0294 ; 1st December 1994 :
81553-90011 : E1294 ; 1st July 1996 : 81553-90011 : E0796

Safety Considerations
Before operation, review the instrument and manual, including the red safety
page, for safety markings and instructions
.You must follow these to ensure safe
operation and to maintain the instrument in safe condition.
Initial Inspection
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.).
Line Power Requirements
The HP 81553SM operates when installed into the HP 8153A Lightwave
Multimeter mainframe
iii

Initial Safety Information for Laser Source Modules
The Specications for these modules are as follows:
HP 81553SM
Laser Type FP-Laser
InGaAsP
Laser Class
According to IEC 825-1 3A
(not USA)
(EN 60825-1 Europe)
According to 21 CFR 1040.10 1
(USA)
Output Power > 0dBm
Beam Diameter 9  m
Numerical Aperture 0.1
Wavelength 1550 6 20nm
iv

Sicherheitsinformation f  ur Laser Quellen
Die Spezikationen f ur die Lasereinsch ube sind wie folgt:
HP 81553SM
Laser Typ FP-Laser
InGaAsP
Laser Klasse
Entsprechend IEC 825-1 3A
(EN 60825-1 Europa)
Ausgangsleistung > 0dBm
Strahldurchmesser 9  m
Numerische Apertur 0.1
Wellenl 
ange 1550 6 20nm
v

Informations et Consignes de S  ecurit  e Relatives  a l'Utilisation
des Lasers.
Les Sp ecications des Modules Laser sont les Suivantes:
HP 81553SM
Type de Laser FP-Laser
InGaAsP
Classe du Laser
Conforme au STD IEC 825-1 3A
(EN 60825-1 Europe)
Puissance de Sortie > 0dBm
Diam ^ etre du Faisceau 9  m
Ouverture Num  erique 0.1
Longueur d'Onde 1550 6 20nm
vi

Contents
C. HP 81553SM Specications
Supplementary Performance Characteristics . . . . . . . . . . . C-2
Internal Digital Modulation . . . . . . . . . . . . . . . . . . C-2
Output Attenuation .. .. .. .. .. .. .. .. .. .. . C-2
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
D. HP 81553SM Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . D-1
Test Record .......................... D-2
Test Failure .......................... D-2
Instrument Specication .... .. .. .. .. .. .. .. .. D-3
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . D-3
Output Power and Stability Tests .... .. .. . .. .. .. D-3
I. Output Power Test.. .. .. .. .. .. . .. .. .. . D-3
II. Attenuation Function Test................ D-4
III. Modulation Function Test.. .. .. .. .. .. .. .. D-5
IV. Stability Test....................... D-5
E. Cleaning Procedures
The Cleaning Kit . . . . . . . . . . . . . . . . . . . . . . . . E-1
Other Cleaning Tools . . . . . . . . . . . . . . . . . . . . . E-3
Preserving Connectors . . . . . . . . . . . . . . . . . . . . . E-4
Cleaning Instrument Housings ................. E-4
Cleaning Procedures . . . . . . . . . . . . . . . . . . . . . . E-5
Cleaning Cable Connectors . . . . . . . . . . . . . . . . . . E-5
Cleaning Connector Adapters . . . . . . . . . . . . . . . . . E-6
Cleaning Connector Interfaces ................ E-6
How to clean instruments with a physical contact interface .. E-7
Light dirt .... .. .. .. .. .. .. .. .. . .. .. E-7
Heavy dirt ........................ E-7
Contents-1

Figures
D-1. Performance Test Setup ................... D-4
Tables
C-1. HP 81553SM Specications . . . . . . . . . . . . . . . . . . C-1
Contents-2

C
HP 81553SM Specications
Specications describe the instrument's warranted preformance. Supplementary
performance characteristics describe the instrument's non-warranted typical
performance.
Because of the modular nature of the instrument, these performance
specications apply only to this module.You should insert these pages into the
appropriate section of the manual.
Table C-1. HP 81553SM Specications
Type FP-Laser
Central Wavelength
[1]
1550nm 6 20nm
Fiber Type single mode 9/125  m
Spectral Bandwidth (RMS)
[2]
< 4nm rms
Output Power
[3]
> 0dBm
CW-Stability
[4]
Short Term (15min, T=Constant) 6 0.003dB
Long Term (6h, T=0 to 55

C 6 1K) 6 0.03dB
Operating Tempreature 0

C to +55

C
Dimensions 75mm H, 32mm W, 335mm D
(2.8 " 2 1.3 " 2 13.2 " 2 )
Weight net 0.7kg (1.5lbs), shipping 1kg (2.2lbs)
Recalibration Period 1 year
[1]
Central Wavelength is shown on the display.
[2]
rms: root mean square.
[3]
Class 3A according to IEC 825-1 (1993), Class 1 according to FDA CFR 21 (1986)
[4]
After a warm-up time of 60 min. with output enabled. If previously stored at
the same temperature, 20 min. only.
HP 81553SM Specications C-1

Supplementary Performance Characteristics
Internal Digital Modulation
You can select internal modulation frequencies of 270HZ, 1kHz, or 2kHz. All
outputs are pulse shaped, with a duty cycle of 50%.
Output Attenuation
The output can be attenuated from 0 to 6dB, in steps of 0.1dB.
Stability
The value of the long term CW-stability doubles with just one minute warmup
time (source enabled).
C-2 HP 81553SM Specications

D
HP 81553SM Performance Tests
Introduction
The procedures in this section test the optical performance of the instrument.
The complete specications to which the HP 81553SM is tested are given in
Table C-1. All tests can be performed without access to the interior of the
instrument. The performance tests refer specically to tests using the Diamond
HMS-10/HP connector.
Equipment Required
Equipment required for the performance test is listed below.
Note
The source module under test can be inserted into the second
channel of the Power Meter Standard. In this case, the second
multimeter mainframe is not necessary.
HP 81553SM Performance Tests D-1

Instrument/Accessory Rec. Model Required
Characteris-
tic
Power Meter Standard
(C01)
HP 8153A Mainframe with HP 81533A
Optical Head Interface Module with HP
81524A Optical Head
Uncertaintay
6 1.5%
Multimeter Mainframe HP 8153A
Connector Adapter
(head)
HP 81000AA
Connector Interface HP 81000AI 2ea (08154-61701)
Singlemode Fiber HP 81101AC
BNC to BNC Cable 8120-1840
Oscilloscope
Test Record
Results of the performance test may be noted in the Performance Test Record.
The Test Record can also be used as a permanent record and may be reproduced
without written permission from Hewlett-Packard
Test Failure
If the HP 81553SM fails any performance test, return the instrument to the
nearest Hewlett-Packard Sales/Service Oce for repair.
D-2 HP 81553SM Performance Tests

Instrument Specication
Specications are the performance characteristics of the instrument that are
certied. These specications, listed in Table C-1, are the performance standards
or limits against that the HP 81553SM can be tested. Appendix C also lists some
supplemental characteristics of the HP 81553SM and should be considered as
additional information.
Any changes in the specications due to manufacturing changes, design, or
traceability to the National Institute of Standards and Technology (NIST)
(formerly the National Bureau of Standards) will be covered in a manual change
supplement or revised manual. The specications listed in such a change
supercede any previously published.
Performance Tests
The performance tests given in this section are separated into Output P
ower
Test and Stability Test. Perform each step in the tests in the order thay are
given, using the corresponding test equipment.
Note
Make sure that all optical connections in the test setups given in
the procedure are dry and clean. For cleaning, use the cleaning
instructions in Appendix E.
The ambient temperature must be constant ( 6 1K) during the
test. The power meter must be zeroed before the measurement.
Output Power and Stability Tests
Specications:
Optical output power of 10/125  m ber: > 0dBm
Stability over 15 minutes at constant temperature: 6 0.003dB
Stability over 6h and 6 1K env. temp. window: 6 0.03dB
I. Output Power Test
1. Make sure that cable connectors and detector windows are clean.
HP 81553SM Performance Tests D-3

2. Turn instruments on, enable the laser output of the HP 81553SM and allow
instruments to warm up for at least 20 minutes.
3. On the power meter:
a. Set  to the wavelength displayed for the HP 81553SM source channel.
b. Make sure that the CAL parameter on the power meter is set to zero.
c. With the connector adapter, on the optical head, covered with a plastic
cap, press 4
Zero
5 to zero the power meter.
4. Connect the equipment as shown in Figure D-1.
Figure D-1. Performance Test Setup
5. On the HP 8153A with the module under test:
a. Press 4
Param
5 until the AUX parameter is selected. Make sure that this
parameter is set to CW .
b. Press 4
Param
5 until the ATT parameter is selected. Make sure that this
parameter is set to zero.
6. Measure the output power and note the result in the Test Record.
II. Attenuation Function Test
7. On the power meter, press 4
Disp ! Ref
5 . Press 4
dB
5 to select a display in dB.
8. Using the modify keys on the HP 8153A with the module under test,
increase the attenuation and check that the output power changes.
Note the reaction on the Test Record.
9. Set the attenuation to 1.0dB.
D-4 HP 81553SM Performance Tests

III. Modulation Function Test
10. Using a BNC cable, connect the power meter transducer output to the
oscilloscope input and set the oscilloscope as follows: 0.5V/DIV DC coupled,
1ms/DIV.
11. On the power meter, switch the autoranging o and select the 0dBm range.
12. On the HP 8153A with the module under test, press 4
Param
5 to select the AUX
parameter. Monitor the frequency change on the oscilloscope as you set the
modulation to 270Hz, 1kHz, and then to 2kHz. Use 4
*
5 and 4
+
5 to modify the
modulation.
Note the reaction on the Test Record.
IV. Stability Test
1. Enable the HP 81553SM laser output and allow the instruments to warm up
for 20 minutes.
2. Select the channel with the source.
a. Press 4
Param
5 to select the AUX parameter. Set this parameter to CW .
b. Press 4
Param
5 to select the ATT parameter. Set this parameter to zero.
3. On the power meter:
a. Cover the input to the sensor with a plastic cap and press 4
Zero
5 to zero the
meter.
b. Press 4
Param
5 to select the  parameter. Set this parameter to the value
displayed for the source.
c. Press 4
Param
5 to select the T parameter. Set this parameter to 1s .
4. Using the HP 81101AC cable, connect the output of the source to the input
of the sensor. Make sure that the cable is xed and that it cannot be moved
during the measurement.
5. Select the MENU mode on the power meter.
a. Press 4
Record
5 to select STABILTY .
b. Press 4
Edit
5 and select the T_TOTAL parameter. Set the T_TOTAL parameter
to 15 minutes.
c. Press 4
Edit
5 and then 4
Exec
5 to run the stability application.
HP 81553SM Performance Tests D-5

6. When the stability test has completed, press
4
More
5 to select the SHOW
application. Press 4
Edit
5 and then 4
Next
5 / 4
Prev
5 to display the DIFF result.
Divide this result by 2 to obtain the value for the stability:
DI F F
2
= S tabil ity ( dB )
Note the result on the Test Record.
7. Repeat the stability measurement (steps 5 and 6) with T_TOTAL set to 6
hours.
D-6 HP 81553SM Performance Tests

Performance Test for the HP 81553SM
Page 1 of 3
Test Facility:
Report No.
Date
Customer
Tested By
Model HP81553SM Source Module
Serial No. Ambient temperature

C
Options Relative humidity %
Firmware Rev. Line frequency Hz
Special Notes:
HP 81553SM Performance Tests D-7

Performance Test for the HP 81553SM
Page 2 of 3
Test Equipment Used:
Description Model No. Trace No. Cal. Due Date
1. Lightwave Multimeter (Std.) (C01) HP 8153A
2. Opt. Head Interface Module (C01) HP 81533A
3. Optical Head 1310nm (C01) HP 81524A
4. Lightwave Multimeter (DUT) HP 8153A
5. Connector Interface HP 81000AI N/A N/A
6. Connector Adapter HP 81000AA N/A N/A
7. Singlemode Fiber HP 81101AC N/A N/A
8. BNC to BNC Cable P/N 8120-1840 N/A N/A
9. Oscilloscope
10.
11.
12.
13.
14.
15.
16.
17.
18.
D-8 HP 81553SM Performance Tests

Performance Test for the HP 81553SM
Page 3 of 3
Model HP 81553SM Source Module No. Date
Test Minimum Maximum Measurement
No.Test Description Spec. Result Spec. Uncertainty
I. Output Power Test
Output Power 0dBm 0.1dB
II. Attenuation Function Test
Passed (P)/Failed (F)
III. Modulation Function Test
Passed (P)/Failed (F)
IV. Stability Tests
Stability (15min.) -0.003dB +0.003dB
Stability (6h.) -0.03dB +0.03dB
HP 81553SM Performance Tests D-9