Agilent 81570A User's Guide

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Agilent 81570A, 71A, 76A, 77A & 78A

Variable Optical Attenuators

User’s Guide

Notices

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No part of this doc ument may rep roduced in ( including e lectronic s torage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies Deutschland GmbH as governed by United States and international copywright laws.

Subject Matter

The material i n this document is subject to change without notice.

Agil ent Techn ologies makes no warranty of any kind with regard to this

printed materi al, including, but not limite d to, the implied warranties of merchantability and fitness for a particular purpose.

Agilent Technologies 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 Agilent Technologies representative.

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

Warranty

This Agilent Technologies instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Agilent 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 Agilent. Buyer shall prepay shipping charges to Agilent and A gilent shall pay shipping charge s to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent from another country.

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

Certification

Agilent Technologies Inc. certifies that this product met its published spec ifications at the ti me of ship ment from the fact ory.

Agilent Technologies 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 t he Institutes’s ca libration facility, and to the calibration facilities of other International Standards Organization members.

ISO 9001:2000 Certification

Produced to ISO 9001:2000 international quality system standard as part of our objective of continually increasing customer satisfaction through improved process contr ol.

Manual Part Number

81570-90A01

Eigth Edition: 81570-90A01: September 01, 2005

Seventh Edition: 81570-90A01: July 20, 2005

Sixth Edition: 81570-90A01: December, 2004

Fifth Edition: 81570-90A01: June 28, 2004

Fourth Edition: 81570-90A01: January 31, 2003

Third Edition: 81560-90A13: October 29, 2002

Seco nd Edition : 81560-90A12: August 04, 2002

First Edition: 81560-90A11: November 2001

Limitation of Warranty

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

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

Exclusive Remedies

The remedies provided herein are Buyer’s sole and exc lusive remedies. Agilent Technologies shall not be liable for any direct, indirect, special, incidental, or conseq uential damages whet her based on contract, tort, or any other legal theory.

Assistance

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

2 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Safety Summary

WAR N ING The WARNING sign denotes a hazard. It calls attention to a procedure, practice or the like,

Safety Summary

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 Inc. 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.

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.

CA U TI O N Optical power levels above 100 mW applied to single mode connectors can easily damage

the connector if it is not perfectly clean. Also, scratched or poorly cleaned connectors can destroy optical connectors mechanically. Always make sure that your optical connectors are properly cleaned and unscratched before connection. Refer to chapter “Cleaning Information” on page 77 on appropriate procedures for connector cleaning and inspection. However, Agilent Technologies Deutschland GmbH assumes no responsibility in case of an operation that is not compliance with the safety instructions as stated above.

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.

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 3

Safety Summary

WARN ING 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.).

WARNING You MUST return instruments with malfunctioning laser modules to an Agilent Technologies

Sales/Service Center for repair and calibration.

Line Power Requirements

The Agilent 81570A, 71A, 78A Variable Optical Attenuator modules and Agilent 81576A, 77A Variable Optical Attenuator modules with Power Control operate when installed in the Agilent 8163A and B Lightwave Multimeters, the Agilent 8164A and B Lightwave Measurement Systems, or the Agilent 8166A and B Lightwave Multichannel Systems.

Within this User’s Guide, these instruments are collectively referred to as ‘mainframes’.

Operating Environment

The safety information in your mainframe’s User’s Guide summarizes the operating ranges for the Agilent 81570A, 71A, 78A Variable Optical Attenuator modules and Agilent 81576A, 77A Variable Optical Attenuator modules with Power Control. In order for these modules to meet specifications, the operating environment must be within the limits specified for your mainframe.

Storage and Shipment

Agilent 81570A, 71A, 78A Variable Optical Attenuator modules and Agilent 81576A, 77A Variable Optical Attenuator modules with Power Control 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.

4 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Firmware Prerequisites

For Agilent 8156x modules with a particular firmware revision to operate correctly, your Agilent 8163A/B, 8164A/B, or 8166A/B mainframe must have a V3.5, or later, firmware revision installed.

For Agilent 8157x modules with a particular firmware revision to operate correctly, your Agilent 8163A/B, 8164A/B, or 8166A/B mainframe must have a V4.0, or later, firmware revision installed.

Firmware files are provided on the OCT Support CD-ROM supplied with the instrument, and the latest firmware revisions can also be downloaded via www.agilent.com/comms/octfirmware

The firmware for A and B versions of our mainframes is not binary compatible. Make sure you select the appropriate firmware for your instrument.

NOTE • Updating mainframe firmware does not require you to update the firmware in every

hosted module. New revisions of mainframe firmware are backwards compatible with older module firmware.

• You may find it advantageous to update module firmware. To help you determine which module firmware to update, a readme file is provided with the firmware file detailing its revision history.

• If the serial number of your 8164A Lightwave Measurement System is DExxxxx339 or below, problems with writing files to the floppy disk drive may occur in rare cases. If this is the case, please contact your nearest Agilent Technologies Sales / Service Office.

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 5

Firmware Prerequisites

Checking your Current Firmware Revision

8163A/B Lightwave Multimeter, 8164A/B Lightwave Measurement System, or 8166A/B Lightwave Multichannel System

To check your 8163A/B Lightwave Multimeter, 8164A/B Lightwave Measurement System, or 8166A/B Lightwave Multichannel System's firmware revision:

1 Press the Config hardkey.

2 Move to the <About Mainframe> menu option and press Enter.

3 The manufacturer, part number, instrument number, and firmware revision are listed. If

the firmware revision number is less than V3.5 for 8156x modules, or is less than V4.0 for 8157x modules, follow the Update Procedure described in the readme.txt in the root directory of the OCT Support CD-ROM supplied with the instrument to install a later firmware revision.

8157x Series Modules

To check an 8157x series, module's firmware revision:

1 Press the Config hardkey.

2 Move to the <About Modules> menu option and press Enter. You see a box displaying

the slots that have a module installed.

3 Move to the appropriate slot using the cursor key and press Enter.

4 The part number, module number, and firmware revision of the chosen module are

displayed. If the firmware revision number is less than V4.0 for 8157x modules, follow the Update Procedure described in the readme.txt in the root directory of the OCT Support CD-ROM supplied with the instrument to install a later firmware revision.

6 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

The Structure of this Manual

This manual is divided into two parts:

• Getting Started This section gives an introduction to the attenuator modules and aims to make these modules familiar to you:

– “Getting Started with Attenuator Modules” on page 15.

• Additional Information

This is supporting information of a non-operational nature, concerning accessories, specifications, and performance tests:

– “Accessories” on page 25,

– “Specifications” on page 31, and

– “Performance Tests” on page 47.

Conventions used in this manual

• Hardkeys are indicated by italics, for example, Config, or Channel.

• Softkeys are indicated by normal text enclosed in square brackets, for example, [Zoom]

or [Cancel].

• Parameters are indicated by italics enclosed by square brackets, for example, [Range Mode], or [MinMax Mode].

• Menu items are indicated by italics enclosed in brackets, for example, <MinMax>, or <Continuous>.

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 7

The Structure of this Manual

8 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Table o f Contents

Table of Contents

Safety Summary 3

Safety Symbols 3 Initial Inspection 3 Line Power Requirements 4 Operating Environment 4 Storage and Shipment 4

Firmware Prerequisites 4

Checking your Current Firmware Revision 6

8163A/B Lightwave Multimeter, 8164A/B Lightwave Measurement System, or 8166A/B Lightwave Multichannel System 6

8157x Series Modules 6

The Structure of this Manual 7

Conventions used in this manual 7

Getting Started with Attenuator Modules 15

What is an Attenuator? 17

Installation 17 Variable Optical Attenuator Front Panels 18

Front Panel Controls and Indicators 19

Typical Use Models 21

Optical Output 23

Angled and Straight Contact Connectors 23

Accessories 25

Modules and Options 27 Modules 28 User’s Guides 28 Connector Interfaces and Other Accessories 29

Specifications 31

Definition of Terms 33

Attenuation 34 Attenuation flatness 34 Attenuation range 35

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 9

Table of Contents

Attenuation setting mode 35 Attenuation uncertainty 35 Constant operating conditions 35 Insertion loss 36 Insertion loss flatness 36 Maximum Input Power 36 Operating temperature 37 Polarization Dependent Loss (PDL) 37 Polarization Extinction Ratio(PER) 37 Power setting mode 37 Relative power meter uncertainty 37 Repeatability (of attenuation or total loss) 38 Resolution 38 Return Loss 38 Settling Time 39 Shutter Isolation 39 Spectral ripple 39 Total loss 40 Transition speed 40 Wavelength Range 40

Specifications 41

Performance Tests 47

Required Test Equipment 48 Performance Test Procedure 50

Insertion Loss Test 51 Accuracy test 53 Repeatability Test 54 Power Setting Repeatability Test 54 Wavelength Flatness Test

(Not applicable to 81578A) 55 Return Loss Test

(Not applicable to 81578A) 56 Polarization Dependent Loss (PDL) Test -

Scanning Method (Not applicable to 81578A) 57

Polarization Dependent Loss (PDL) Test Mueller Method (Not applicable to 81578A) 59

10 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Table of Contents

Cleaning Information 77

Safety Precautions 79 Why is it important to clean optical devices? 80 What materials do I need for proper cleaning? 80

Standard Cleaning Equipment 80

Dust and shutter caps 81 Isopropyl alcohol 81 Cotton swabs 81 Soft tissues 82 Pipe cleaner 82 Compressed air 82

Additional Cleaning Equipment 83

Microscope with a magnification range about 50X up to 300X 83 Ultrasonic bath 83 Warm water and liquid soap 84 Premoistened cleaning wipes 84 Polymer film 84 Infrared Sensor Card 84

Preserving Connectors 85 Cleaning Instrument Housings 85 General Cleaning Procedure 86

How to clean connectors 86 How to clean optical head adapters 87 How to clean connector interfaces 88 How to clean bare fiber adapters 89 How to clean lenses and instruments with an optical glass plate 89 How to clean instruments with a fixed connector interface 90 How to clean instruments with a physical contact interface 90 How to clean instruments with a recessed lens interface 92 How to clean optical devices which are sensitive to mechanical stress

and pressure 92 How to clean metal filters or attenuator gratings 93

Additional Cleaning Information 94

How to clean bare fiber ends 94 How to clean large area lenses and mirrors 94

Other Cleaning Hints 96

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 11

Table of Contents

12 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

List of Figures

Figure 1 Agilent 81576A/77A Optical Attenuators with Power Control . . . . . . 7

Figure 2 Agilent 81570A Attenuator with Straight Connector . . . . . . . . 8

Figure 3 Agilent 81571A Attenuator with Angled Connector . . . . . . . . 8

Figure 4 Agilent 81578A Multimode Attenuator with Straight Connector. . . . . . 9

Figure 5 Agilent 81576A High-power Attenuator with Power Control and Straight Connector . 10 Figure 6 Agilent 81577A High-power Attenuator with Power Control and Angled Connector . 10

Figure 7 Angled and Straight Contact Connector Symbols . . . . . . . . . 13

Figure 8 Mainframes, Variable Optical Attenuator Modules, and Options. . . . . . 17

Figure 9 Insertion Loss Reference . . . . . . . . . . . . . . 40

Figure 10 Insertion Loss Test . . . . . . . . . . . . . . . . 41

Figure 11 Return Loss Reference Setup for SM attenuators . . . . . . . . . 45

Figure 12 Return Loss Test Setup for SM attenuators . . . . . . . . . . 45

Figure 13 PDL Test Setup - Scanning Method for SM attenuators . . . . . . . 47

Figure 14 PDL Reference Setup for SM attenuators. . . . . . . . . . . 49

Figure 15 PDL Test Setup - Mueller method . . . . . . . . . . . . 51

Figure 16 Relative Power Meter uncertainty Setup for SM attenuators . . . . . . 53

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 13

List of Figures

14 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Getting Started with Attenuator Modules

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 15

Getting Started with Attenuator Modules

CAUTION Optical power levels above 100 mW applied to single mode connectors can easily damage

This chapter describes the:

• Agilent 81570A, 81571A VOA modules,

• Agilent 81578A Multimode VOA and the

• Agilent 81576A and 81577A VOA modules with power control

16 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

What is an Attenuator? Getting Started with Attenuator Modules

What is an Attenuator?

Agilent 8157x Variable Optical Attenuators attenuate and control the optical power of light in single and multimode optical fibers. They allow you to set the attenuation factor and/or power level manually, or via the host instrument’s GPIB interface.

Agilent 81576A and 81577A attenuators include power control functionality that allows you to set the output power level of the attenuator. When power control mode is enabled, the module automatically corrects for power changes at the input so that the output power level set by the user is maintained. See Figure 1 on page 17.

Installation

Agilent 8157xA Variable Optical Attenuators are front-loadable modules for the Agilent 8163A/B Lightwave Multimeter, 8164A/B Lightwave Measurement System, and 8166A/B Lightwave Multichannel System, collectively referred to as ‘mainframes’.

An Agilent 81570A, 71A or 78A module occupies one slot, while an Agilent 81576A or 77A module occupies two slots.

For a description of how to install your module, refer to “How to Fit and Remove Modules” in the Installation and Maintenance chapter of your mainframe’s User’s Guide.

81576A / 81577A

input

Figure 1 Agilent 81576A/77A Optical Attenuators with Power Control

attenuator

control

loop

power

meter

out put

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 17

Getting Started with Attenuator Modules What is an Attenuator?

Variable Optical Attenuator Front Panels

Agilent 81570A

81570A

Figure 2 Agilent 81570A Attenuator with Straight Connector

Agilent 81571A

Figure 3 Agilent 81571A Attenuator with Angled Connector

81571A

18 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

What is an Attenuator? Getting Started with Attenuator Modules

Agilent 81578A

81578A

MMF 50um

Figure 4 Agilent 81578A Multimode Attenuator with Straight Connector

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 19

Getting Started with Attenuator Modules What is an Attenuator?

Agilent 81576A

81576A

Figure 5 Agilent 81576A High-power Attenuator with Power Control and Straight Connector

Agilent 81577A

81577A

Figure 6 Agilent 81577A High-power Attenuator with Power Control and Angled Connector

20 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

What is an Attenuator? Getting Started with Attenuator Modules

Front Panel Controls and Indicators

The front panel contains a push button to switch the shutter open/closed, and a LED that indicates the state of the shutter. If the shutter is “open”, the LED shows “enable”, and light can pass through the instrument.

Typical Us e Models

Brief description Agilent's 8157xA Variable Optical Attenuators are instruments that attenuate and control

the optical power level of light in single and multimode optical fibers. As plug-in modules for Agilent's Lightwave Multichannel platform (8163A/B, 8164A/B, 8166A/B) they allow you to set the attenuation factor and/or power level manually, or remotely via a common computer interface. Their high accuracy combined with their flexibility make them ideal as test and measurement equipment for the modern telecommunication industry.

Modular Design for Multichannel Platform Agilent's 8157xA variable optical attenuators are a family of plug-in modules for Agilent's

Lightwave Multichannel Platform 8163A/B, 8164A/B and 8166A/B. The attenuator modules 81570A, 81571A, 81578A occupy one slot, while modules 81576A and 81577A occupy two slots. The Agilent 8166A/B Lightwave Multichannel System with its 17 slots can host up to 17 single slot modules (such as the 81570A attenuators) or up to 8 dual slot modules, (such as the 81577A attenuators).

Variable Optical Attenuators Agilent's 81570A, 81571A and 81578A are small and cost effective attenuator modules

with high resolution for single-wavelength applications. Once you have entered the operating wavelength, the instrument automatically applies the appropriate corrections. Various calibration features allow you to set a reference power so that both the attenuation and the power level, relative to the reference power, can be set and displayed in the user interface. An integrated shutter can be used for protection purposes or to simulate channel drops.

Agilent's 81570A and 81571A have excellent wavelength flatness and can handle high input power levels. These features, combined with low insertion loss, allow you to use these modules for characterizing EDFAs and Raman amplifiers, as well for other multi-wavelength applications such as DWDM transmission system testing. They include the reference power functionality and an integrated shutter.

Agilent's 81578A modular attenuators are available for multimode applications with fiber interface option for 50µm (#050) and 62.5µm (#062).

Attenuators with Power Control Agilent's 81576A and 81577A attenuators have the power control functionality combined

with the high-power handling capability and excellent wavelength flatness required for DWDM applications.

To set the the total power level of a multi-wavelength signal, it is necessary to determine the convolution of the signal’s spectrum against the sensitivity of the photodiode over wavelength. An enhanced calibration feature allows you to set the integrated power of the DWDM signal against a known spectrum.

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 21

Getting Started with Attenuator Modules What is an Attenuator?

Calibration Processes Comprehensive offset functionality in the firmware enhances the calibration of the optical

path in various test set-ups. There is an offset for the attenuation factor, and an independent offset for the output power level, to calibrate for losses due to the patch cords and connectors. Additionally, wavelength and offset value pairs can be stored in a table to compensate for wavelength dependent effects in the optical path of the set-up. This allows you to set the optical power level at your Device Under Test.

Calibration is even easier and more convenient if the reference powermeter and the attenuator are hosted by the same mainframe: All power related offsets can be determined by a firmware function that reads a value from the reference powermeter. The difference between the power value read by the reference powermeter and the actual value of the attenuator is automatically stored as the offset.

22 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Optical Output Getting Started with Attenuator Modules

Optical Output

Angled and Straight Contact Connectors

Agilent 81570A Variable Optical Attenuator modules and 81576A Variable Optical Attenuator modules with Power Control are designed for straight connector interfaces.

Agilent 81571A Variable Optical Attenuator modules and 81577A Variable Optical Attenuator modules with Power Control are designed for angled connector interfaces.

The Agilent 81578A (with option 050 or 062) Variable Optical Attenuator modules are designed for straight (FC/PC) multimode connector.

The inclusion of an angled contact connector is not optionable, and depends on the module part number.

Angled contact connectors help you to control return loss, since reflected light tends to reflect into the cladding, reducing the amount of light that reflects back to the source.

CAUTION If the contact connector on your instrument is angled, you can only use cables with angled

connectors with the instrument.

Angled Contact

Connector Symbol

Figure 7 Angled and Straight Contact Connector Symbols

Figure 7 shows the symbols that tell you whether the contact connector of your attenuator module is angled or straight. The angled contact connector symbol is colored green.

You should connect straight contact fiber end connectors with neutral sleeves to straight contact connectors, or connect angled contact fiber end connectors with green sleeves to angled contact connectors.

NOTE You cannot connect angled non-contact fiber end connectors with orange sleeves directly

to the instrument.

See “Accessories” on page 25 for further details on connector interfaces and accessories.

Straight Contact

Connector Symbol

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 23

Getting Started with Attenuator Modules Optical Output

24 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Accessories

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 25

Accessories

Agilent 8157xA Variable Optical Attenuator modules are available in various configurations for the best possible match to the most common applications.

This chapter describes the options and accessories available for the:

• Agilent 81570A, 81571A VOA modules,

• Agilent 81578A VOA modules for multimode applications; and the

• Agilent 81576A and 81576A VOA modules with power control.

26 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Modules and Options Accessories

Modules and Options

Figure 8 shows all the options that are available for Agilent 8157xA Variable Optical Attenuator modules, and the instruments that support these modules.

Agilent 8164A or B Lightwave Measurement System

Optical Attenuators for Straight Contact Interface

Agilent 81570A (single slot) Optical Attenuator

Agilent 81578A (single slot) Optical Attenuator for multi-mode applications. # 050: 50 µm fiber interface # 062: 62.5 µm fiber interface

Agilent 81576A VOA (dual slot) Optical Attenuator with Power Control

Variable Optical Attenuator Straight Contact Interface

Agilent 8163A or B

Lightwave Multimeter

Variable Optical Attenuator with SMF pigtail 2m length

FC/APC

Variable Optical Attenuator Angled Contact Interface

Agilent 8166A or B Lightwave Multichannel System

Optical attenuators for Angled Contact Interface

Agilent 81571A (single slot) Optical Attenuator.

Agilent 81577A (dual slot) Optical Attenuator with Power Control.

Connector Interfaces

81000 FI FC/PC/SPC 81000 HI E-2000 81000 KI SC/PC/SPC 81000 SI DIN 47256 81000 VI ST

8157xA - OC - ACCS

8157xA QC - STRGT

Connector Interface for straight connectors

8157xA QC - ANGLED

Connne ctor Interface f or angled connectors

Connector Interfaces

81000 HI E2000 APC 81000 KI SC/APC 81000 NI FC/APC 81000 SI DIN 4108.6

Figure 8 Mainframes, Variable Optical Attenuator Modules, and Options

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 27

Accessories Modules

Modules

Agilent 8157xA Modular Attenuator can be hosted by:

• Agilent 8163A and Agilent 8163B Lightwave Multimeters,

• Agilent 8164A and Agilent 8164B Lightwave Measurement Systems,

• Agilent 8166A and Agilent 8166B Lightwave Multichannel Systems.

User’s Guides

Description Part No.

Agilent 8157xA Modular Attenuator User’s Guide (English). 81570-90A01 Agilent 8163A/B Lightwave Multimeter, Agilent 8164A/B Lightwave Mea-

surement System, & Agilent 8166A/B Lightwave Multichannel System User’s Guide.

Agilent 8163A/B Lightwave Multimeter, Agilent 8164A/B Lightwave Measurement System, & Agilent 8166A/B Lightwave Multichannel System Programming Guide.

08164-90B14

08164-90B63

Connector Interfaces and Other Accessories

CAUTION Optical power levels above 100 mW applied to single mode connectors can easily damage

28 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

Connector Interfaces and Other Accessories Accessories

81570A, 81578A and 81576A

Variable Optical Attenuator Modules

81571A and 81577A

Variable Optical Attenuator Modules

If you want to use straight connectors (such as FC/PC, DIN, SC or ST) to connect to the instrument, you must do the following:

1 Attach your connector interface to the interface adapter.

See Figure 8 for a list of the available connector interfaces.

2 Connect your cable.

If you want to use angled connectors (such as FC/APC or SC/APC) to connect to the instrument, you must do the following:

1 Attach your connector interface to the interface adapter.

See Figure 8 for a list of the available connector interfaces.

2 Connect your cable.

Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition 29

Accessories Connector Interfaces and Other Accessories

30 Agilent 81570A, 71A, 76A, 77A & 78A Variable Optical Attenuators, Eigth Edition

+ 68 hidden pages

Agilent 81570A User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual