Agilent 81635A Users Guide

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HP 8163A/4A/6A Lightwave Series Mainframes

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Guide

E1299

Notices

This document contains proprietary information that is protected by copyright. All rights are reserved.

No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard GmbH.

Subject Matter

The information in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this printed material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Hewlett-Packard 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.

Printing History

New editions are complete revisions of the guide reflecting alterations in the functionality of the instrument. Updates are occasionally made to the guide between editions. The date on the title page changes when an updated guide is published. To find out the current revision of the guide, or to purchase an updated guide, contact your Hewlett-Packard representative.

Control Serial Number: First Edition applies directly to all instruments.

Certification

Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory.

Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, NIST (formerly the United States National Bureau of Standards, NBS) to the extent allowed by the Institutes’s calibration facility, and to the calibration facilities of other International Standards Organization members.

ISO 9001 Certification

Produced to ISO 9001 international quality system standard as part of our objective of continually increasing customer satisfaction through improved process control.

81635-90014 E1299 First Edition:

E1299: December 1999

Warranty

This Hewlett-Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, HP will, at its option, either repair or replace products that prove to be defective.

For warranty service or repair, this product must be returned to a service facility designated by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, B uyer shall pay all shipping charges, duties, and taxes for products returned to HP from another country.

HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument. HP does not warrant that the operation of the instrument, software, or firmware will be uninterrupted or error free.

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

No other warranty is expressed or implied. Hewlett-Packard specifically disclaims the implied warranties of Merchantability and Fitness for a Particular Purpose.

Exclusive Remedies

The remedies provided herein are Buyer’s sole and exclusive remedies. Hewlett-Packard shall not be liable for any direct, indirect, special, incidental, or consequential damages whether based on contract, tort, or any other legal theory.

Assistance

Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products. For any assistance contact your nearest Hewlett-Packard Sales and Service Office.

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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. HewlettPackard Company assumes no liability for the customer’s failure to comply with these requirements.

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.

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.

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.

Initial Inspection

Inspect the shipping container for damage. If there is damage to the container or cushioning, keep the m 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 Hewlett-Packard Sales/Service Office.

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 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module operate when installed in the HP 8163A Lightwave Multimeter, HP 8164A Lightwave Measurement System, and HP 8166A Lightwave Multichannel System.

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 3

Operating Environment

The safety information in the HP 8163/4A Lightwave Measurement System User’s Guide summarizes the operating ranges for the HP 81632A Power Sensor Module and HP 81635A Dual Powe r Sensor Module. In order for these modules to meet specifications, the operating environment must be within the limits specified for the HP 8163A Lightwave Multimeter, HP 8164A Lightwave Measurement System, and HP 8166A Lightwave Multichannel System.

Storage and Shipment

This 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.

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Safety Considerations 3

Safety Symbols 3 Initial Inspection 3

Line Power Requirements 3

Operatin g Environment 4 Storage and Shipment 4

Contents 5 Accessories 7

Modules and Options 9

Specifications 11

Power Sensor Specifications (Autorange Mode) 13

Performance Tests 15

Equipment Required 17 Test Record 18 Test Failure 18 Instrument Specification 18

Performance Test 18

Accuracy Test 19

Test Setup 19

Linearity Test 21

Test Setup 21 +10 dBm Range 22 0 dBm Range 23

-10 dBm Range 23 Change Setup 23

-20 dBm to -50 dBm Range 24 Calculation 24 Example: Measurement Results 25 Calculations 26

Noise Test 27 Return Loss Test 28 Relative Uncertainty due to Polarization (Optional Test) 29 Relative Uncertainty due to Interference (Optional Test) 31

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Calculation Sheet for Linearity Measurement 42

Index 43

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Accessories

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 7

The HP 81632A Power Sensor Module and the HP 81635A Dual Power Sensor Module are available in various configurations for the best possible match to the most common applications.

This chapter provides information on the available options and accessories.

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Modules and Options

Connector Interfaces

81000AI Diamond HMS-10 81000FI FC/PC/SPC 81000GI D4 81000JI SMA 81000KI SC/APC 81000NI FC/APC 81000PI E-2000 81000SI DIN 47526 81000VI ST 81000WI Biconic

Connector Interfaces

Power Sensor Module

HP 8163A Lightwave Multimeter

Power Sensors Economic Mo dules

81632A 10 dBm to -90 dBm 81635A 10 dBm to -110 dBm

Connector Interfaces

Bare

Fiber

Adapters

and Bare Fiber Adapters

81000FI FC/PC/SPC 81000FB Bare Fiber Adapter

81000KI SC/APC 81000KB Bare Fiber Adapt er

81000SI DIN 47526 81000SB Bare Fiber Adapter

81000VI ST 81000SB Bare Fiber Adapter

Figure 1 Recommended Connector Interfaces and Bare Fiber Adapters

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 9

Product Number Connector InterfaceType

81000AI Diamond HMS-10 81000FI FC/PC/SPC 81000GI D4 81000JI SMA 81000KI SC/APC 81000NI FC/APC 81000PI E-2000 81000SI DIN 47526 81000VI ST 81000WI Biconic

Table 1 Connector Interfaces

Product Number Bare Fiber Adapter Product Number Connector Interface

81000FB Bare Fiber Adapter 81000FI FC/PC/SPC 81000KB Bare Fiber Adapter 81000KI SC/APC 81000SB Bare Fiber Adapter 81000SI DIN 47526 81000SB Bare Fiber Adapter 81000VI ST

Table 2 Connector Interface and Bare Fiber Adapter Combinations

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Specifications

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 11

HP 81632A Power Sensor Module and the HP 81635A Dual Power Sensor Module are produced to the ISO 9001 international quality system standard as part of HP’s commitment to continually increasing customer satisfaction through improved quality control.

Specifications describe the modules’ and heads’ warranted performance. Supplementary performance characteristics describe the modules’ and heads’ non-warranted typical performance.

Because of the modular nature of the instrument, these performance specifications apply to these modules and heads rather than the mainframe unit.

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Power Sensor Specifications (Autorange Mode)

HP 81632A HP 81635A Sensor Element Wavelength Range Power Range Display Resolution Applicable Fiber Type Uncertainty (accuracy) at Refer-

ence Conditions Total Uncertainty Relative Uncertainty

Spectral Ripple (due to interference)

Linearity (power)

Due to Polarization

- at 23°C ±5°C

- at operating temp. range

InGaAs InGaAs (dual)

800 - 1650 nm

¥80 dBm

+10 to

0.0001dB/dBm, 0.01pW to 10 pW (depending on power range)

Standard SM and MM up to 62.5 µm core size, NA ≤ 0.24

< ±3% (1200 nm to 1630 nm)

< ±5%

CW +10 to

(1200 nm to 1630 nm)

± 0.015 dB typical

¥60 dBm (1200 nm to 1630 nm)

< ± 0.02 dB ± 20 pW < ± 0.06 dB ± 20 pW

9 9

Return Loss Noise (peak to peak) Averaging Time (minimal) Dimensions (H x W x D) Weight Recalibration Period Operating Temperature Humidity Warm-up time

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 13

5, 6

75 mm × 32 mm × 335 mm (2.8” × 1.3” × 13.2”)

>40 dB

< 20 pW

100 µs

0.5 kg

2 years

+10°C to +40°C Non-condensing

20 minutes

1 Reference Conditions

HP 81632A HP 81635A

• Power level 10 µW (

• Fiber 50 µm graded-index, NA=0.2

• Ambient temperature 23°C ± 5°C

• Connector Diamond HMS-10/HP

• On day of calibration (add ± 0.3% for ageing over one year; add ± 0.6% over two years)

• Spectral width of source < 10 nm (FWHM)

• Wavelength setting at Power Meter must correspond to source wavelength ± 0.4 nm 2 Total uncertainty includes polarization, interference, linearity conditions:

• Fiber ≤ 50 µm, NA ≤ 0.2

• Only HP 81632A and HP 81635A: For fiber 62.5 µm graded-index (NA=0.24): add ± 2 %

• Within one year of calibration, add 0.3% for second year

• Add ±1% for Biconic connector

3 All states of polarization at constant wavelength (1550 nm ± 30 nm) and constant power, straight connector, T=23°C±5 °C

For angled connector (8°C) add 0.01 dB typ. 4 Conditions:

¥20 dBm), continuous wave (CW)

W avelength 1550 nm ± 30 nm, fixed state of polarization, constant power, Temperature 23°C ± 5°C Linewidth of source ≥ 100 MHz, angled connector 8°.

5 At constant temperature ∆T = ± 1°C 6 Averaging time 1 s, T = 23°C ± 5 °C, observat ion time 300 s. Wavelength range 1200 - 1630 nm. 7 Conditions

• Wavelength 1550 nm ± 30 nm

• Standard single-mode fiber, angled connector min 8°

• T= 23°C ± 5 °C

8 For wavelengths >1600 nm add ±0.0 6 %/nm 9 For input power >2 mW add ±0.02 dB

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Performance Tests

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 15

The procedures in this section test the performance of the instrument. The complete specifications to which the HP 81632A Power Sensor Module and the HP 81635A Dual Power Sensor Module are tested are given in “Specifications” on page 11. All tests can be performed without access to the interior of the instrument. The performance tests refer specifically to tests using the Diamond HMS-10/HP connector.

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Equipment Required

Equipment required for the performance test is listed in the table below. Any equipment that satisfies the critical specifications of the equipment given in the table may be substituted for the recommended models.

Instrument/Accessory Recommended Model

Multimeter Mainframe HP 8163A (2 each) x x HP 8164A CW Laser Module HP 81656A x x HP 81657A CW Laser Mo dule HP 81554SM x x HP 81657A Power Meter Standard HP 81533B Optical Head

Interface Module with HP 81521B #C01

Working Standard Optical Head Power Sensor Module HP 81532A x x HP 81634A Optical Attenuator HP 8156A #221 x x Optical Attenuator HP 8156A #101 x x HP 8157A or

Backreflector Kit HP 8156A #203 x x Return Loss Module HP 81534A x x

Tunable Laser Sour ce HP 8164A and HP 81680A #022 - - HP 8168E/F # 022 Polarization Controller HP 11698A - Wavelength Independ-

ed Coupler (3 dB)

Special Tool - -

8163xA

2A 5A

Required Characteristics

Alternative Models

HP 8158B #002

Best IF Adapter Special Tool - -

Singlemode Fiber HP 81101AC (2 each) x x

HP 81102SC (1 ea ch) x x

HP 81109AC (1 each) x x

HP 81113PC (3 each) x x

HP 81113SC (1 each) x x Connector Adapters HP 81000AA (1 each) x x Connector Interfaces HP 81000AI (5 each) x x

HP 81000FI (3 each) x x

HP 81000SI (5 each) x x Plastic Cap PN 5040-93 51 x x DIN Feedthrough PN 1005-0255 x x

Legend:

- not applicable x necessary o optional

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 17

Test Record

Results of the performance test may be tabulated on the Test Record provided at the end of the test procedures. It is recommended that you fill out the T est Record and refer to it while doing the test. Since the test limits and setup information are printed on the Test Record for easy reference, the record can also be used as an abbreviated test procedure (if you are already familiar with the test procedures). 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 81632A/5A fails any performance test, return the instrument to the nearest Hewlett-Packard Sales/Service Office for repair.

Instrument Specification

Specifications are the performance characteristics of the instrument that is certified. These specifications, listed in “Specifications” on page 11, are the performance standards or limits against which the HP 81632A/5A can be tested. “Specifications” on page 11 also lists some supplemental characteristics of the HP 81632A/5A. Supplemental characteristics should be considered as additional information.

Any changes in the specifications due to manufacturing changes, design, or traceability to the National Institute of Standards and Technology (NIST), will be covered in a manual change supplement, or revised manual. Such specifications supercede any that were previously published.

Performance Test

The performance test given in this section includes the Accuracy Test, the Linearity Test, the Return Loss Test and th e Nois e Test.

NOTE Make sure that all optical connections are dry and clean. DO NOT USE INDEX

MATCHING OIL. For cleaning, use the cleaning instructions given in Appendix E.

Fix the optical cables that connect the laser source and Power Meter to the HP 8156A Attenuator. This ensures minimum cable movement during the tests.

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Accuracy Test

8156

NOTE The linearity test must only be performed at either 1310 nm or 1550 nm. The

accuracy test must be performed in the -20 dBm range at 10 µW at both 1310 nm and 1550 nm.

Test Setup

1 Make sure that cable connector, detectors and adapters are clean. 2 Connect the equipment as shown in Figure 2. Instead of a HP 81554SM Laser

Source you can also use a HP 81657A Laser Source. Ensure that the cables to and from the attenuator are fixed on the table and that b oth the optical head and the DUT are close together so that minimum cable movement is required when connecting the cable to the head or to the DUT.

Move to the Laser Source channel, move to the wavelength parameter, [λ],

press Enter, select the lower wavelength source, and press Enter.

4 If you are using a HP 81657A Laser Source ensure to initialize the HP 8156A

Optical Attenuator with 30 dB attenuation.

Mainframe 8163A or 8 164 A

81554SM

8163A

81101AC



Figure 2 Accuracy Test Setup

8156A Optical Attenuator

ainframe 8163A with 8163xA and

81533B with 81521B Opt. Head

8163xA

81101AC

Optical Head 81521 B

Wk Std

5 Turn the instruments on, enable the laser source and allow the instruments to

warm up for at least 20 minutes.

81533B

8163A

6 Perform the following sub-procedure for both Power Meters:

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 19

a Move to the Power Meter channel. b

Move to the wavelength parameter, [λ], press Enter, enter the wavelength of the laser source, and

c Move to the calibratio n param e ter, [CAL], press Enter, set the calibration

parameter to zero, and press Enter.

d Move to the averaging time parameter, [AvgTime], p ress Enter, move to

<500 ms>, and press Enter.

e Move to the power parameter, [P], press [Pwr unit], move to <Watt>, and

press Enter.

7 Make sure the optical input of the Device Under Test (DUT), 8163xA, is not

receiving any light by placing a plastic cap over the input. Move to the DUT Power Meter channel, press [Menu], move to <Zero>, press Enter.

8 Ensure, that the HP 8156A output is disabled. Move to the reference Power

Meter channel, 81532A, press [Menu], move to <Zero>, pre ss Enter.

Enable the HP 8156A output and change the attenuation until the reference

Power Meter displays 10.00

10Connect the attenuator output cable to the DUT Power Meter. Note the power

value returned from the DUT, [P], from the display and note the result in the test record.

press Enter.

µW.

Move to the Laser Source channel, move to the wavelength parameter, [λ],

press Enter, select the longer wavelength source, and press Enter.

12Repeat steps 4 to 10 at the second wavelength with the corresponding source.

20 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

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Linearity Test

and 8163xA (DUT)

8156A /

81113PC

Mainframe 8163A w/ 81656A FLS

81656A

8163A

tical Attenuator 8156A #221

Monito

Optical Attenuator 8156A

Mainframe 8163A w/ 81532A (REF)

8163xA81532A

REF

8163A

81113SC

81113PC

Figure 3 Measurement Setup for Power Linearity

NOTE • Do not turn the laser off during the measurement!

• Clean all connectors carefully before you start with the measurement!

Test Setup

1 Make sure that cable connector, detectors and adapters are clean. 2 Make sure that you perform this test in a temperature-controlled environment

with temperature fluctuations less than ±1°C.

3 Setup the equipment as shown in Figure 3. Dis able both attenuators and enable

the laser source, where the source wavelength is chosen to 1550 nm. If you are using the 81657A, move to the wavelength parameter, [λ], press Enter, select the longer wavelength source (1550 nm nominally), and press Enter.

4 Set the wavelength of both attenuators to the same wavelength as the laser

source.

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 21

5 Perform the following sub-procedure for both Power Meters:

a Move to the Power Meter channel. b

Move to the wavelength parameter, [λ], press Enter, enter the wavelength of the laser source, and

c Move to the calibration parameter, [CAL], press Enter, set the calibration

parameter to zero, and press Enter.

press Enter.

d Move to the averaging time parameter, [AvgTime], p ress Enter, move to

<100 ms>, and press Enter.

e Move to the power parameter, [P], press [Pwr unit], move to <dBm>, and

press Enter.

f Press the [Menu] softkey and move to <Number of digits>, press Enter,

move to <3>, press Enter and press [Close].

6 Initialize the two attenuators as follows:

a Set the attenuation of the 8156A #221 with Monitor Output (referred to as

Atty1) to 0 dB.

b Set the attenuation of the other 8156A (referred to as Atty2) to 35 dB.

7 Wait at least 15 minutes until the laser source is stabilized. 8 Perform the following sub-procedure for the reference Power Meter, 81532A:

a Press [Menu], move to <Range mode>, move to <Manual>, and press

Enter.

b Move to <Range>, press Enter, move to <-40 d Bm>, press Enter, and press

[Close].

9 Perform the following sub-procedure for the DUT, 8163xA:

a Press [Menu], move to <Range mode>, move to <Manual>, and press

Enter.

b Move to <Range>, press Enter, move to <10 dBm>, and press Enter. c Zero both Power Meters. Move to <Zero al l > and press Enter.

10Enable both attenuators. 11 Adjust the attenuation of Atty2 in order to achieve -37.2 dBm on the reference

Power Meter.

+10 dBm Range

12Note both power readings as the first value in the test record, which is given at

the end of the test descriptions (#1).

NOTE Always include the three digits after the decimal point when you note a power

reading.

13Increase the attenuation of Atty1 until the power reading of the DUT shows

about +2.8 dBm.

14Note the InRange-values in the test record (#2) 15Perform the following sub-procedure for the DUT, 8163xA:

a Press [Menu], move to <Range mode>, move to <Manual>, and press

Enter.

b Move to <Range>, press Enter, move to <0 dBm>, and press Enter.

16If necessary, adjust the attenuation of Atty2 in order to be on the upper limit of

the -40 dBm range (i.e. -37.2 dBm).

22 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

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0 dBm Range

17Disable Atty1. 18Zero both Power Meters. On the 8163A with two installed power meters, press

[Menu], move to <Zero all>, and press Enter.

19Enable Atty1. 20Switch one range up to the +10dBm range. 21Note both power readings (#3). 22Switch down to the previous range (0dBm) and note the values again (#4). 23Increase Atty1 by 10 dB and note the results in the test record (#5). 24Move to the channel of the DUT, 8163xA, press [Menu], move to <Range>,

press Enter, move to <-10 dBm>, and pres s Enter.

25If necessary, adjust the attenuation of Atty1 in order to be on the upper limit of

the range (i.e. -x7.y dBm).

26Decrease the attenuation of Atty2 by 10 dB in order to be on the upper limit of

the -40 dBm range.

-10 dBm Range

27Disable Atty1. 28Zero both Power Meters. On the 8163A with two installed power meters, press

[Menu], move to <Zero all>, and press Enter.

29Enable Atty1. 30Switch one range up to the 0 dBm range and note the power readings (#6). 31Switch down to the previous range (-10 dBm) and note the values again (#7). 32Increase the attenuation of Atty1 by 10 dB and note the results in the test

record (#8).

33On the DUT switch one range down to the -20 dBm range.

Change Setup

34Disable Atty1 and switch the output with the monitor output. 35Set the attenuation of Atty1 to 15 dB and of Atty2 to 35 dB. 36Enable Atty1 again. 37Adjust the attenuation of both attenuators in the following order:

– Atty1: DUT Power Meter shows a readi ng of -17.2 dBm and – Atty2: the REF Power Meter shows a reading of -37.2 dBm.

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 23

-20 dBm to -50 dBm Range

38Disable Atty1. 39Zero both Power Meters. On the 8163A with two installed power meters, press

[Menu], move to <Zero all>, and press Enter.

40Enable Atty1. 41Switch one range up and note both power readings. 42Switch one range down and note the power readings again. 43Increase the attenuation of Atty1 by 10 dB and note the results in the test

record.

44On the DUT switch one range down. Adjust the attenuation of Atty1, if

necessary, so that the power displayed by the DUT is at the upper limit of the range, that is, -x7.y dBm.

45Decrease the attenuation of Atty2 by 10 dB in order to be on the upper limit of

the -40 dBm range. Repeat step 33 to 39 until the power reading of the DUT shows -57.x dBm.

Calculation

46Calculate the non-linearity using the formulas given in the test record.

24 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

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Example: Measurement Results

Information only You r Entries

Atty1 / #221

1 0 24 10 -37,291 8,957 1. Valu e 2 6 24 10 -42,928 3,314 InRange 3 6 18 10 -37,299 3,317 RangeDisc / lower limit 4 6 18 0 -37,298 3,318 RangeDisc / upper limit 5 16 18 0 -47,280 -6,666 InRange 6 16 8 0 -37,301 -6,664 RangeDisc / lower limit 7 16 8 -10 -37,299 -6,662 RangeDisc / upper limit 8 26 8 -10 -47,294 -16,658 InRange 9 7,7 35,7 -10 -37,304 -17,321 RangeDisc / lower limit 10 7,7 35,7 -20 -37,302 -17,318 RangeDisc / upper limit 11 17,7 35,7 -20 -47,293 -27,309 InRange 12 17,7 25,7 -20 -37,285 -27,312 RangeDisc / lower limit

[dB]

Atty2 / #100

[dB]

DUT Range [dBm]

REF Power [dBm]

DUT Power [dBm] Notes

13 17,7 25,7 -30 -37,282 -27,309 RangeDisc / upper limit 14 27,7 25,7 -30 -47,280 -37,308 InRange 15 27,7 15,7 -30 -37,278 -37,306 RangeDisc / lower limit 16 27,7 15,7 -40 -37,276 -37,304 RangeDisc / upper limit 17 37,7 15,7 -40 -47,277 -47,306 InRange 18 37,7 5,7 -40 -37,274 -47,301 RangeDisc / lower limit 19 37,7 5,7 -50 -37,271 -47,298 RangeDisc / upper limit 20 47,7 5,7 -50 -47,270 -57,298 InRange

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 25

Calculations

Conversion [dBm]

n Ref / R DUT / D Relat ion 1 / A Relation2 / B Non-Linearity

[mW] [mW] = R

1 1,86612E-04 7,86448E+0

2 5,09542E-05 2,14462E+0

3 1,86312E-04 2,14640E+0

4 1,86260E-04 2,14704E+0

5 1,87068E-05 2,15501E-01 6 1,86256E-04 2,15561E-01 9,99540E-01 9,99471E-01 -0,16 7 1,86170E-04 2,15675E-01 1,00157E-01 9,99079E+00 -0,06 8 1,86462E-05 2,15874E-02

→ [mW]

Calculation as given

n+1/Rn

2,73049E-01 3,66708E+00 -0,02

9,99724E-01 9,99701E-01 -0,15

1,00434E-01 9,96300E+00 -0,09

= Dn/D

n+1

Calculation as given

= An*Bn (NL

n±1

[%]

+1) - 1



9 1,86110E-04 1,85298E-02 9,99540E-01 9,99240E-01 -0,12

10 1,86024E-04 1,85439E-02 Reference Level

11 1,86518E-05 1,85819E-03 9,97356E+00 1,00205E-01 -0,06 12 1,86973E-04 1,85708E-03 13 1,86857E-04 1,85810E-03 1,00062E+00 1,00055E+00 0,06 14 1,87068E-05 1,85849E-04 9,98872E+00 1,00021E-01 -0,03 15 1,87245E-04 1,85935E-04 16 1,87150E-04 1,86050E-04 1,00051E+00 1,00062E+00 0,08 17 1,87206E-05 1,85973E-05 9,99701E+00 9,99586E-02 0,01 18 1,87443E-04 1,86149E-05 19 1,87335E-04 1,86264E-05 1,00058E+00 1,00062E+00 0,13 20 1,87495E-05 1,86312E-06 9,99148E+00 1,00025E-01 0,07

NOTE : The Nonlinearity is calculated recursively using n=11 as reference point. The

formula is:

0,00

26 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

1,00% 0,80% 0,60% 0,40% 0,20% 0,00%

-0,20%

-0,40%

Nonlinearity [%]

-0,60%

-0,80%

-1,00%







()

nnn

()

nnn

−+⋅

−

1011

nforNLBA

1011

nforNLBA

Nonlineari t y HP 81635A / Channel 1

-60 -50 -40 -30 -20 -10 0 10

Opti c al Powe r [d Bm ]

Figure 4 Linearity Test

Noise Test

1 Insert the device under test, a 816xA power sensor, into a slot of the 8163A

mainframe Make sure the optical input of the Device Under Test (DUT), 8163xA, is not receiving any light by placing a plastic cap over the input. Move to the DUT Power Meter channel, press [Menu], move to <Zero>, and press Enter.

2 Press Appl, move to <Stability>, and press Enter. The Stability Setup Screen

appears.

3 Ensure, that the correct channel is selected in the upcoming Module Selection

box.

4 Press [Menu] to access the Logging application menu screen. 5 Move to <Pwr unit>, press Enter, move to <W>, and press Enter. 6 Move to <AvgTime>, press Enter, move to <1 s>, and press Enter. 7 Move to <Range mode>, press Enter, move to <Auto>, and press Enter, and

press [Close].

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 27

8 Press the [Parameter] softkey, move to [TotalTime], press Enter, set the total

time to 00:05:00, which is 5 minutes, and press Enter.

9 Press the [Measure] softkey to start the measurement. 10

After the stability application has finished, press th e [Analysis] softkey, press the [more] softkey, and note [∆P] as the noise value in the test record.

Return Loss Test

1 Connect the equipment as shown in Figure 5/. Alternatively, you can use a

clean and undamaged straight fiber end as a reference reflector.

2 Move to the fixed wavelength Laser Sour ce chan nel, select [Men u] and set the

<Modulation src 15xx.xnm> to <Coherence Ctrl>. Ensure, that you set the modulation of the upper wavelength source if you are using a HP 81657A Laser Source.

3 Set the attenuation of the HP 8156A optical attenuator to 10.0 dB at the

wavelength given by the source module and enable the output of the attenuator.

4 Set the averaging time of the Return Loss Module to 1s by pressing Param and

set the wavelength to the wavelength of the Laser Source.

5 Zero the Return Loss Module. 6 Select the reference parameter, R, by pressing Param and set this to 0.18 dB

(in case of a straight fiber end as reflector, set the reference to 14.7 dB).

Enable the source output and press Disp→Ref for the Return Loss Module.

7 8 Select the termination parameter T by pressing Param. 9 Disconnect the HP 81102SC and the HP 8156A #203 patchcords from each

other.

Press Disp→Ref for the Return Loss Module.

11 Ensure, that the termination parameter T at the Return Loss Module shows a

reading of more than 50dB.

28 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Optical Attenuator 8156A

8156A / 2

81656A and 8163xA (D U T )

8153

12Connect the DIN-connector of the 81102SC patch cord to th e sensor modu le as

shown in Figure 5/ó.

Mainframe 8163A or 8164A w/

81656A 8163xA

8163A

81101AC

Figure 5 Return Loss Measurement Setup

Mainframe 8153A or 8163A, 8164A w/ 81534A Return Loss

81534A

13Note the result as the return loss o f the sensor module into the test record.

81102SC

HMS10/ HRL



1005-0255

8156A #203

Relative Uncertainty due to Polarization (Optional Test)

NOTE The performance test "Relative Uncertainty due to Polarization" is optional, since

the polarization is given with the production of the unit by mechanical and optical cavities and stays unchanged by normal use of the sensor module.

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 29

Below, you will find the test setup to verify the relative uncertainty due to polarization of the sensor module. Generally, during this measurement-procedure the tunable laser source is swept through a predefined wavelength range. After every wavelength step, a single PDL-measurement is made, where the polarization controller generates all different polarization states. The highest PDL

Mainframe 8164A

816

8168

)

value is taken as the "relative uncertainty due to polarization". The low output power path of the coupler is used to monitor the power stability of the setup.

HP-IB

Mainframe 8163A w/ 81533B and 81521B O

81533B

tical Head (Ref, special

8163A



20 dB

Polarization Ctrl 11896A

Figure 6 Measurement Setup for PDL Test

99%

Approved IF free

optical head

ecial tool)



Best I

Adapter

81521B

Note

Mainframe 8163A w/ 8163xA Sensor Module (DUT)

8163xA

angled connector (81113SC)

8163A

DIN 4108



30 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Relative Uncertainty due to Interference (Optional Test)

NOTE The performance test "Relative Uncertainty due to Interference" is optional, since

the interference is given with the production of the unit by mechanical and optical cavities and stays unchanged by normal use of the sensor module.

Below, you will find the test setup to verify the relative uncertainty due to interference of the sensor module. In order to perform the relative uncertainty due to interference test, it is mandatory to use two mainframes, since the time difference between measurement A und B for a specific wavelength point has to be at most 2 ms. Due to this short measurement interval, the performance test of the relative uncertainty due to interference can only be using computer control.

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 31

Mainframe 8164A

816

8168

)

81521B



DIN 4108



Note

angled connector (81113SC)

HP-IB



3 dB

Best IF

ter

Ada

Approved IF free

optical head

ecial tool)

Mainframe 8163A w/ 8163xA Sensor Module (DUT)

8163xA

8163A



Mainframe 8163A w/ 81533B and 81521B O

81533B

tical Head (Ref, special

8163A

Figure 7 Setup for Relative Uncertainty due to Interference Measurement

Theoretically, both Power Meters are monitoring the power ratio over the variable wavelength in a predefined range as shown in Figure 8. Ensure that the tunable laser source is mode-hop free in the tested wavelength range.

32 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

[dB]

A B

max. 10mdB

Figure 8 Interference Ripple

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 33

34 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Performance Test for the HP 81632A

Page 1 of 3

Model HP 81632A Sensor Module___ Date ___________

Serial No. _________________________ Ambient Temperature ___________°

Options _________________________ Relative Humidity ___________ %

Firmware Rev. _________________________ Line Frequency ___________ Hz

Test Facility _________________________ Customer _________________________

Performed by _________________________ Report No _________________________

Special Notes ______________________________________________________________________

______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 35

Performance Test for the HP 81632A Test Equipment Used

Page 2 of 3

Description Model No. Trace No Cal. Due Date

1a1 Lightwave Multimeter (Std.) HP 8163A ____________ ___________ 1a2 Lightwave Multimeter (DUT) HP 8163A ____________ ___________ 1b TLS Mainframe HP 8164A ____________ ___________ 2a1 CW High Power Laser Source HP 81655A ____________ ___________ 2a2 CW High Power Laser Source HP 81656A ____________ ___________ 2b CW Dual High Power Laser Source HP 81657A ____________ ___________ 3 CW Dual Laser Source HP 81554SM ____________ ___________ 4a1 Opt. Head Interface Module HP 81533B ____________ ___________ 4a2 Optical Head, Reference HP 81521B ____________ ___________ 5 Sensor Module HP 81532A ____________ ___________ 6 Optical Attenuator HP 8156A #221 ____________ ___________ 7a Optical Attenuator HP 8156A #101 ____________ ___________ 7b Optical Attenuator HP 8157A ____________ ___________ 7c Optical Attenuator HP 8158B #002 ____________ ___________ 8 Return Loss Module HP 81534A ____________ ___________ 9 ____________________________ ____________ ____________ ___________ 10 ____________________________ ____________ ____________ ___________ 11 ____________________________ ____________ ____________ ___________ 12 ____________________________ ____________ ____________ ___________

Accessories # Product # Product # Product

Si ngle mode Fibers 2 81101AC 1 81102SC 1 81109AC

3 81113PC 1 81113SC Connector Interfaces 5 81000AI 3 81000FI 5 81000SI Connector Adapters 1 81000AA Backreflector Kit 1 8156A #203

36 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Performance Test for the HP 81632A

Page 3 of 3

Model HP 81632A Sensor Module Report No.________ Date ________________

Test No. Test Description

I Accuracy Test

measured at _______ nm (1310nm) Output Power

measured at _______ nm (1550nm) Output Power

II Linearity Test

Range P

DUT

+10 +9 ________ _______ <± 0.93 % +10 +3 ________ _______ <± 0.46 % 0 +3 ________ _______ <± 0.46 % 0 -7 ________ _______ <± 0.46 %

-10 -7 ________ _______ <± 0.46 %

-10 -17 ________ _______ <± 0.46 %

[dBm] P

Min. Spec. Result

Max. Spec.

[µW]

9.64 µW _______ 10.36 µW

For Calculations you may want to use the appropriate sheet

[dBm] Loss [%]

DUT

Measurement Uncertainty

-20* -17* Reference

-20 -27 ________ _______ <± 0.46 %

-30 -27 ________ _______ <± 0.46 %

-30 -37 ________ _______ <± 0.47 %

-40 -37 ________ _______ <± 0.47 %

-40 -47 ________ _______ <± 0.56 %

-50 -47 ________ _______ <± 0.56 %

-50 -57 ________ _______ <± 1.46 %

III Noise Test

IV Return Loss Test

0.0

[pW]

_______ < 20 pW [dB]

40 dB < _______

<± 0.46 %

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 37

38 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Performance Test for the HP 81635A

Page 1 of 3

Model HP 81635A Sensor Module___ Date ___________

Serial No. _________________________ Ambient Temperature ___________°

Options _________________________ Relative Humidity ___________ %

Firmware Rev. _________________________ Line Frequency ___________ Hz

Test Facility _________________________ Customer _________________________

Performed by _________________________ Report No _________________________

Special Notes ______________________________________________________________________

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 39

Performance Test for the HP 81635A Test Equipment Used

Page 2 of 3

Description Model No. Trace No Cal. Due Date

1a1 Lightwave Multimeter (Std.) HP 8163A ____________ ___________ 1a2 Lightwave Multimeter (DUT) HP 8163A ____________ ___________ 1b TLS Mainframe HP 8164A ____________ ___________ 2a1 CW High Power Laser Source HP 81655A ____________ ___________ 2a2 CW High Power Laser Source HP 81656A ____________ ___________ 2b CW Dual High Power Laser Source HP 81657A ____________ ___________ 3 CW Dual Laser Source HP 81554SM ____________ ___ ________ 4a1 Opt. Head Interface Module HP 81533B ____________ ___________ 4a2 Optical Head, Reference HP 81521B ____________ ___________ 5 Sensor Module HP 81532A ____________ ___________ 6 Optical Attenuator HP 8156A #221 ____________ ___________ 7a Optical Attenuator HP 8156A #101 ____________ ___________ 7b Optical Attenuator HP 8157A ____________ ___________ 7c Optical Attenuator HP 8158B #002 _____ ___ ___ _ ___________ 8 Return Loss Module HP 81534A ____________ ___________ 9 ____________________________ ____________ ____________ ___________ 10 ____________________________ ____________ ____________ ___________ 11 ____________________________ ____________ ____________ ___________ 12 ____________________________ ____________ ____________ ___________

Accessories # Product # Product # Product

Singlemode Fibers 2 81101AC 1 81102SC 1 81109AC

3 81113PC 1 81113SC Connector Interfaces 5 81000AI 3 81000FI 5 81000SI Connector Adapters 1 81000AA Backreflector Kit 1 8156A #203

40 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Performance Test for the HP 81635A

Page 3 of 3

Model HP 81632A Sensor Module Report No.________ Date ________________

Test No. Test Description

I Accuracy Test

measured at _______ nm (1310nm) Output Power

measured at _______ nm (1550nm) Output Power

II Linearity Test

Range P

DUT

+10 +9 ________ _______ <± 0.93 % +10 +3 ________ _______ <± 0.46 % 0 +3 ________ _______ <± 0.46 % 0 -7 ________ _______ <± 0.46 %

-10 -7 ________ _______ <± 0.46 %

-10 -17 ________ _______ <± 0.46 %

For Calculations you may want to use the appropriate sheet

[dBm] P

Min. Spec. Result

[µW]

9.64 µW _______ 10.36 µW

[dBm] Loss [%]

DUT

Max. Spec.

Measurement Uncertainty

-20* -17* Reference

-20 -27 ________ _______ <± 0.46 %

-30 -27 ________ _______ <± 0.46 %

-30 -37 ________ _______ <± 0.47 %

-40 -37 ________ _______ <± 0.47 %

-40 -47 ________ _______ <± 0.56 %

-50 -47 ________ _______ <± 0.56 %

-50 -57 ________ _______ <± 1.46 %

III Noise Test

IV Return Loss Test

0.0

[pW]

_______ < 20 pW [dB]

40 dB < _______

<± 0.46 %

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 41

Calculation Sheet for Linearity Measurement

Conversion [dBm] → [mW] Calculation as given Calc ulation as given

n Ref / R DUT / D Relation1 / A Relation2 / B Non-Linearit y

1 2 3 4 5 6 7 8 9 10 11 12 13

[mW] [mW] = R

n+1/Rn

= Dn/D

n+1

= An*Bn (NL

[%]

n±1

+1) - 1



14 15 16 17 18 19 20

42 HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module

User’s Guide, E1299

Index

Accessories 7 Accuracy Test 19

Bare Fiber Adapters 9

Connector Interfaces 9

Linearity Test 21

Noise Test 27

Optional features 9

Performance Tests 15

HP 81632A 35 HP 81635A 39

Power Sensor module

Performance tests 16

Relative Uncertainty due to Interference 31 Relative Un certainty due to Pola r ization 29 Return Loss Test 28

Specifications 11

HP 81632A Power Sensor Module and HP 81635A Dual Power Sensor Module User’s Gu ide, E1299 43

Agilent 81635A Users Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Considerations

Safety Symbols

Initial Inspection

Line Power Requirements

Operating Environment

Storage and Shipment

Contents

Accessories

Modules and Options

Specifications

Power Sensor Specifications (Autorange Mode)

Performance Tests

Equipment Required

Test Record

Test Failure

Instrument Specification

Performance Test

Accuracy Test

Test Setup

Linearity Test

Test Setup

+10 dBm Range

0 dBm Range

-10 dBm Range

Change Setup

-20 dBm to -50 dBm Range

Calculation

Example: Measurement Results

Calculations

Noise Test

Return Loss Test

Relative Uncertainty due to Polarization (Optional Test)

Relative Uncertainty due to Interference (Optional Test)

Calculation Sheet for Linearity Measurement

Index