HP HP 81551MM User manual

Operating and Programming Manual
HP 81551MM Lightwave
Multimeter Source Module
SERIAL NUMBERS
This manual applies to all instruments.
ABCDE
HP Part No. 81551-90011
Printed in the Federal Republic of Germany
Second Edition
E1294

Control Serial Number: Edition 2 applies directly to all instruments.
Edition 1 : 1st May 1990 : 81551-90011 : E0590
Edition 2 : 1st November 1990 : 81551-90011 : E1190
1st August 1991 : 81551-90011 : E0891
1st December 1994 : 81551-90011 : E1294

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
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 veried 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 Hewlett-Packard oce.
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 81551MM operates when installed into the HP 8153A Lightwave
Multimeter mainframe
Operating Environment
The HP 8153A safety information summarizes the HP 81551MM operating
environment ranges. In order for the HP 81551MM to meet specications, the
operating environment must be within the limits specied for the HP 8153A.
Storage and Shipment
The module can be stored or shipped at temperatures between 0 40

C and
+70

C. Protect the module from temperature extremes that may cause
condensation within it.
iii

Initial Safety Information for Laser Source Modules
The specications for these modules are as follows:
HP 81551MM
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 > -2dBm
Beam Diameter 50  m
Numerical Aperture 0.2
Wavelength 850 6 10nm
iv

Sicherheitsinformation f  ur Laser Quellen
Die Spezikationen f ur die Lasereinsch ube sind wie folgt:
HP 81551MM
Laser Typ FP-Laser
InGaAsP
Laser Klasse
Entsprechend IEC 825-1 3A
(EN 60825-1 Europa)
Ausgangsleistung > -2dBm
Strahldurchmesser 50  m
Numerische Apertur 0.2
Wellenl 
ange 850 6 10nm
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 81551MM
Type de Laser FP-Laser
InGaAsP
Classe du Laser
Conforme au STD IEC 825-1 3A
(EN 60825-1 Europe)
Puissance de Sortie > -2dBm
Diam ^ etre du Faisceau 50  m
Ouverture Num  erique 0.2
Longueur d'Onde 850 6 10nm
vi

Contents
C. HP 81551MM Specications
Suppelementary Performance Characteristics .... .. .. .. C-2
Internal Digital Modulation . . . . . . . . . . . . . . . . . . C-2
Output Attenuation .. .. .. .. .. .. .. .. .. .. . C-2
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Spectral Bandwidth (FWHM) ................. C-2
D. HP 81551MM Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . D-1
Test Record .......................... D-2
Test Failure .......................... D-2
Instrument Specication .. .. .. .. .. .. .. .. .. .. D-2
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . D-2
Output Power and Stability Tests .... .. .. . .. .. .. D-3
Output Power Test.... .. .. .. .. .. .. .. .. . D-3
Attenuation Function Test .... .. .. .. .. .. .. . D-4
Modulation Function Test .... .. .. .. .. .. .. . D-4
Stability Test ........................ D-4
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
Contents-1

Figures
D-1. Performance Test Setup ................... D-3
Tables
C-1. HP 81551MM Specications . . . . . . . . . . . . . . . . . . C-1
Contents-2

C
HP 81551MM 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 81551MM Specications
Laser Type Fabry Perot Laser
Central Wavelength
1
850 6 10nm
Fiber type multimode, 50/125  m
Spectral Bandwidth
2
< 1.5nm rms
Output Power
2
> -2dBm
CW-Stability
Short Term (15min, T=constant) 6 0.01dB
Long Term (6h, T= 0

Cto55

C 6 1K) 6 0.06dB
Operating temperature 0

C to +55

C
Dimensions 75mm H, 32mm W, 335mm D (2.8 " 2 1.3 " 2 13.2 " )
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 81551MM Specications C-1

Suppelementary 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 (laser enabled).
Spectral Bandwidth (FWHM)
The spectral bandwidth is, typically, twice the specied RMS value.
C-2 HP 81551MM Specications