Agilent 81560A, 81561A Variable Optical Attenuator Modules and Agilent 81566A, 81567A Variable Optical Attenuator Modules with Power Control User’s Guide S1
Notices This document contains proprietary information that is protected by copyright. All rights are reserved. No part of this document may reproduced in (including electronic storage 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. Copyright 2001 by: Agilent Technologies Deutschland GmbH Herrenberger Str.
Safety Summary 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.
Safety Summary WARNING You MUST return instruments with malfunctioning laser modules to an Agilent Technologies Sales/Service Center for repair and calibration.
Firmware Prerequisites 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. 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/comp-test The firmware for A and B versions of our mainframes is not binary compatible.
Firmware Prerequisites 3 The manufacturer, part number, instrument number, and firmware revision are listed. If the firmware revision number is less than V3.5, follow the Update Procedure described in the readme.txt on the root directory of this compact disk to install the newest firmware revision for your mainframe. 8156x Series Modules To check an 8156x series module's firmware revision: 1 Press the Config hardkey. 2 Move to the menu option and press Enter.
The Structure of this Manual 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.
The Structure of this Manual 8 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
Table of Contents Table of Contents Safety Summary Safety Symbols Initial Inspection Line Power Requirements Operating Environment Storage and Shipment Firmware Prerequisites 3 3 3 4 4 4 5 Checking your Current Firmware Revision 5 8163A/B Lightwave Multimeter, 8164A/B Lightwave Measurement System, or 8166A/B Lightwave Multichannel System 5 8156x Series Modules 6 The Structure of this Manual Conventions used in this manual Getting Started with Attenuator Modules What is an Attenuator? Installation Var
Table of Contents Specifications 29 Definition of Terms Accuracy (Uncertainty) Attenuation Attenuation Setting (where applicable) Attenuation Range Correction (of Attenuation) Insertion Loss Maximum Input Power Operating Temperature Polarization Dependent Loss (PDL) Power setting (where applicable) Reference Connector Relative Power Meter Uncertainty (where applicable) Repeatability Resolution Return Loss Settling Time Shutter Isolation Total Loss Wavelength Range Specifications Performance Tests 31 3
Table of Contents Test Equipment Used Insertion Loss Test Attenuation Accuracy Test Attenuation Repeatability Test Power Setting Repeatability Test Return Loss Test Polarization Dependent Loss Test - Scanning Method (11896A) Polarization Dependent Loss Test - Mueller Method (8169A) Relative Power Meter Uncertainty Test Cleaning Information 58 59 59 60 60 61 62 62 64 65 Safety Precautions Why is it important to clean optical devices? What do I need for proper cleaning? Standard Cleaning Equipment Dust an
Table of Contents How to clean instruments with a physical contact interface 79 How to clean instruments with a recessed lens interface 80 How to clean optical devices which are sensitive to 81 mechanical stress and pressure How to clean metal filters or attenuator gratings 82 Additional Cleaning Information 83 How to clean bare fiber ends How to clean large area lenses and mirrors Other Cleaning Hints 12 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 83 83 85
List of Figures List of Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Agilent 81566A/81567A Optical Attenuators with Power Control . . Agilent 81560A Attenuator with Straight Connector . . . . . Agilent 81561A Attenuator with Angled Connector . . . . .
List of Figures 14 Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
Getting Started with Attenuator Modules Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 15
Getting Started with Attenuator Modules This chapter describes the Agilent Variable Optical Attenuator modules and Agilent Variable Optical Attenuator modules with Power Control.
What is an Attenuator? Getting Started with Attenuator Modules What is an Attenuator? Agilent 8156xA Variable Optical Attenuators attenuate and control the optical power of light in single-mode optical fibers. They allow you to set the attenuation factor and/or power level manually, or via the host instrument’s GPIB interface. Agilent 81566A and 81567A attenuators include power control functionality that allows you to set the output power level of the attenuator.
Getting Started with Attenuator Modules What is an Attenuator? Variable Optical Attenuator Front Panels Agilent 81560A Figure 2 Agilent 81560A Attenuator with Straight Connector Agilent 81561A Figure 3 Agilent 81561A Attenuator with Angled Connector 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.
What is an Attenuator? Getting Started with Attenuator Modules Variable Optical Attenuator Front Panels Agilent 81566A Figure 4 Agilent 81566A Attenuator with Power Control and Straight Connector Agilent 81567A Figure 5 Agilent 81567A Attentuator with Power Control and Angled Connector 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.
Getting Started with Attenuator Modules What is an Attenuator? Typical Use Models 20 Brief description Agilent's 8156xA Variable Optical Attenuators are instruments that attenuate and control the optical power level of light in single mode 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.
What is an Attenuator? Getting Started with Attenuator Modules 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.
Getting Started with Attenuator Modules Optical Output Optical Output Angled and Straight Contact Connectors Angled contact connectors are available for Agilent Variable Optical Attenuator modules and Agilent Variable Optical Attenuator modules with Power Control. The inclusion of an angled contact connector is not optionable, and depends on the module part number.
Accessories Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 23
Accessories The Agilent 81560A, 81561A Variable Optical Attenuator modules and Agilent 81566A, 81567A Variable Optical Attenuator modules with Power Control 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.
Modules and Options Accessories Modules and Options Figure 7 shows all the options that are available for Agilent 81560A, 81561A Variable Optical Attenuator modules and Agilent 81566A, 81567A Variable Optical Attenuator modules with Power Control, and the instruments that support these modules.
Accessories Modules Variable Optical Attenuator Modules Model No. Description Agilent 81560A Variable Optical Attenuator with Straight Contact Connector Agilent 81561A Variable Optical Attenuator with Angled Contact Connector Agilent 81566A Variable Optical Attenuator with Power Control and Straight Contact Connector Agilent 81567A Variable Optical Attenuator with Power Control and Angled Contact Connector User’s Guides User’s Guides 26 Description Part No.
Connector Interfaces and Other Accessories Accessories Connector Interfaces and Other Accessories 81560A and 81566A Variable Optical Attenuator Modules If you want to use straight connectors (such as FC/PC, Diamond HMS10, DIN, Biconic, SC, ST or D4) to connect to the instrument, you must do the following: 1 Attach your connector interface to the interface adapter. See Table 1 for a list of the available connector interfaces. 2 Connect your cable (see Figure 8).
Accessories Connector Interfaces and Other Accessories 81561A and 81567 Variable Optical Attenuator Modules If you want to use angled connectors (such as FC/APC, Diamond HRL10, or SC/APC) to connect to the instrument, you must do the following: 1 Attach your connector interface to the interface adapter. See Table 2 for a list of the available connector interfaces. 2 Connect your cable (see Figure 9).
Specifications Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 29
Specifications The Agilent 81560A, 81561A Variable Optical Attenuator modules and Agilent 81566A, 81567A Variable Optical Attenuator modules with Power Control are produced to the ISO 9001 international quality system standard as part of Agilent Technologies’ commitment to continually increasing customer satisfaction through improved quality control. Specifications describe the modules’ warranted performance. Supplementary performance characteristics describe the modules non-warranted typical performance.
Definition of Terms Specifications Definition of Terms This section defines terms that are used both in this chapter and “Performance Tests” on page 39. Generally, all specifications apply for the given environmental conditions and after warmup time. Measurement principles are indicated. Alternative measurement principles of equal value are also acceptable. Accuracy (Uncertainty) difference between att. setting. and act. att.
Specifications Definition of Terms total loss [dB] total loss attenuation insertion loss attenuation setting [dB] 0 0 N O TE For a displayed attenuation of 0 dB the actual attenuation is 0 dB per definition. Attenuation Setting (where applicable) When changing the displayed attenuation, this module behaves like a pure attenuator. N O TE Alternatively, the attenuator can be operated in power setting. Attenuation Range Range of displayed attenuation for which the specifications apply.
Definition of Terms Specifications Measurement: with EDFA to apply the necessary input power, TLS and Optical Power Meter to test the wavelength dependence Insertion Loss Total loss at an attenuation setting of 0 dB. Conditions: as specified, with reference connectors Measurement: with Fabry-Pérot Laser Source. Maximum Input Power The maximum input power level that can be applied to the attenuator without permanent change of its characteristics.
Specifications Definition of Terms Relative Power Meter Uncertainty (where applicable) When changing the output power of attenuator, the relative power meter uncertainty is the maximum error of the displayed output power ratio to the actual output power ratio. This uncertainty is caused by the internal power meter's nonlinearity and noise and by errors in the sensing hardware, expressed as ± half the span of all possible errors with an offset due to the noise level of the power meter. Symbol RU.
Definition of Terms Specifications Repeatability total loss [dB] The uncertainty in reproducing the total loss after randomly changing and re-setting the attenuation. The repeatability is ± half the span between the maximum and the minimum total loss, expressed in dB. full span repeatability repetition Conditions: Uninterrupted line voltage, constant temperature, constant humidity, constant wavelength, constant input power level, and constant polarization state.
Specifications Definition of Terms Measurement: With optical oscilloscope or transcient recorder. N O TE Settling time excludes the time needed for the interpretation of the command and for the internal communication between the mainframe and the attenuator module. Shutter Isolation Ratio between transmitted powers with open and with closed shutter, at an attenuator setting of 0 dB, expressed in dB.
Specifications Specifications Specifications Variable Optical Attenuator Modules Agilent 81560A Agilent 81561A Connectivity1 straight connector angled connector Fiber type 9/125 µm SMF28 9/125 µm SMF28 Wavelength range 1200-1700 nm 1200-1700 nm Attentuation range 0-60 dB 0-60 dB Resolution 0.001 dB 0.001 dB ±0.01 dB ±0.01 dB ±0.1 dB4 ±0.1 dB 4 typ. <100 ms typ. <100 ms typ. 1.7 dB typ. 1.7 dB < 0.05 dBpp < 0.05 dBpp typ. > 45 dB typ. > 60 dB + 23 dBm + 23 dBm typ.
Specifications Specifications Variable Optical Attenuator Modules with Power Control Agilent 81566A Agilent 81567A Connectivity1 straight connector angled connector Fiber type 9/125 µm SMF28 9/125 µm SMF28 Wavelength range 1250-1650 nm 1250-1650 nm Attentuation range 0-60 dB 0-60 dB Resolution 0.001 dB 0.001 dB Attenuation Setting Power Setting Attenuation Setting Power Setting Repeatability2 ±0.01 dB ±0.01 dB3 ±0.01 dB ±0.01 dB3 Accuracy (uncertainty)4 ±0.
Performance Tests Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 39
Performance Tests The procedures in this section test the optical performance of the Agilent 8156xA Variable Optical Attenuator modules. The complete specifications to which the instrument is tested are given in “Specifications” on page 29. All tests can be performed without access to the interior of the instrument. The performance tests refer specifically to test using an Agilent reference connector.
Required Test Equipment Performance Tests Required Test Equipment The equipment required for the Performance Test is listed in Table 3. Any equipment that satisfies the critical specifications of the equipment given in Table 3 may be substituted for the recommended models.
Performance Tests Required Test Equipment Test Record Results of the performance test may be tabulated in the Test Record provided at the end of the test procedures. It is recommended that you fill out the Test 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).
Performance Test Instructions Performance Tests Performance Test Instructions The performance tests given in this section includes the Attenuation Repeatability Test. Perform each step in the order given, using the corresponding test equipment. Operate an Agilent 81566A and 81567A Attenuator module as an attenuator and switch the power control loop off if not otherwise mentioned. N O TE : Make sure that all optical connections of the test setup given in the procedure are dry and clean.
Performance Tests Performance Test Instructions Insertion Loss Test Carry out the following Insertion Loss Test at 1550 nm with single mode fibers using the equipment listed in Table 3, “Equipment Required,” on page 41. To adapt for the straight or angled contact versions of the attenuator use the patchcords with appropriate connectors and the adequate connector interfaces. 1 Turn the instruments on and allow the devices to warm up (20..30min). 2 Make sure that all your connectors are clean and undamaged.
Performance Test Instructions Performance Tests Mainframe 8163A w/ 81634B + 81654A 8163A 81560A/66A: 81113PC 81561A/67A: 81113SC Mainframe 8163A w/ 8156xA Attenuator 8163A 81560A/66A: 81113PC 81561A/67A: 81113SC Instrument Connector Interfaces DIN connector (angled): 81000SI FC/PC connector (straight): 81000FI Figure 11 Insertion Loss Test Setup 9 Set attenuation [α] to 0dB and open the shutter. 10 Record the power meter reading (in dB) in the Test record.
Performance Tests Performance Test Instructions Repeatability Test Use the same equipment and test setup as used in Figure 11. The performance test can be performed at other wavelengths than 1550 nm. 1 Turn the instruments on and allow the devices to warm up (20..30min). 2 Make sure that all your connectors are clean and undamaged. 3 Set the attenuator and the power meter to the actual wavelength of the laser source. 4 Disable the laser source, zero the power meter and select Autorange. Display [dB].
Performance Test Instructions Performance Tests 6 Set [PSET ] to 0 dBm and wait for stabilizing. Note the reading of [PACT] in the Test Record. 7 Set [PSET ] to any other value and wait until settling. 8 Change [PSET] back to the previous value and note the deviation of [PACT] in the Test Record. 9 Repeat the steps 6 to 8 for [PSET] = - 25 dBm and [PSET] = - 50 dBm.
Performance Tests Performance Test Instructions 8 The value read should now be 14.7 dB, the same as the value entered for reflection reference R. 9 Terminate the reference cable by wrapping the fiber several times around a pencil or the shaft of a screwdriver, and then select the [TERM CAL] softkey. 10 Remove the reference cable and connect the equipment as shown in Figure 13.
Performance Test Instructions Performance Tests Polarization Dependent Loss (PDL) Test - Scanning method Carry out the following PDL Test at 1550 nm with single mode fibers using the equipment listed in Table 3, “Equipment Required,” on page 41. To adapt for the straight or angled contact versions of the attenuator use the patchcords with appropriate connectors and the adequate connector interfaces. N O TE: This test method is recommended if the fiber-loop type 11869A Polarization Controller is used.
Performance Tests Performance Test Instructions • Wavelength = Source Wavelength • Range Mode = auto 8 Set the 11896A Polarization Controller scan rate = 4 and press [AutoScan] to start Polarization Scrambling. 9 Press Measure at the power meter to start PDL Scanning. 10 After the measurement press [Analysis] and [More] to get the power readings. 11 Note the results in the Test Record.
Performance Test Instructions Performance Tests NOTE The patchcords from and to the polarization controller and the attenuator must not move during and between all measurements. Use tape to fix the fibers on the table. 4 Zero the power meter. Display [W]. 5 Set the attenuator and the power meter to the actual wavelength of the source. 6 Enable the laser source and allow 5 minutes for the laser to settle. 7 Reset the polarization controller.
Performance Tests Performance Test Instructions Polarization. Measure the Reference Power. 17 Keep the settings from the polarizer and the l/4 and l/2 Retarder Plates from steps 8, 10 and 12 for Linear Horizontal polarized light. 18 Note the power reading as Reference Power P1 in the Test Record. 19 Set the l/4 and l/2 Retarder Plates to the corrected wavelength dependent positions for Linear Vertical polarized light.
Performance Test Instructions Performance Tests Measure the optical power after the Attenuator Module. 26 Open the shutter of the attenuator. 27 Set the l/4 and l/2 Retarder Plates for Linear Horizontal polarized light. 28 Note the power reading as DUT Power P1 in the Test Record. 29 Set the l/4 and l/2 Retarder Plates to the corrected wavelength dependent positions for Linear Vertical polarized light. 30 Note the power that is displayed on the power meter as DUT Power P2 in the Test Record.
Performance Tests Performance Test Instructions Relative Power Meter Uncertainty Test Carry out the following Power Meter Uncertainty Test at 1550 nm or another specified wavelength with single mode fibers using the equipment listed in Table 2: Equipment required. To adapt for the straight or angled contact versions of the attenuator use the patchcords with appropriate connectors and the adequate connector interfaces.
Performance Test Instructions Performance Tests 10 Enable the laser source and wait for stabilizing (>30 seconds). 11 Enable the attenuators. 12 Set the reference power meter to the wavelength of the source, set the averaging time to 1s and display [dB]. Press [Display to Reference]. 13 Set the range mode of the reference power meter to [manual]. 14 On the DUT attenuator edit [P Offset] until the parameter [PSET] equals 0 dBm. 15 Lower [PSET] and the attenuation of the reference attenuator by 5dB.
Performance Tests 56 Performance Test Instructions Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
Test Record Performance Tests Test Record Agilent Optical Attenuator Module Performance Test Page 1 of 8 Test Facility: ________________________________ Report No. _________________ ________________________________ Date _________________ ________________________________ Customer _________________ ________________________________ Tested By _________________ Model Agilent Optical Attenuator Module Performance Test Serial No.
Performance Tests Test Record Page 2 of 8 Agilent Optical Attentuator Module Report No. ________ Date_______ Test Equipment Used Description Model No. Trace No. Cal. Due Date 1. Mainframe ___________ _________ __/___/__ 2. Power Meter ___________ _________ __/___/__ 3. Laser Source ___________ _________ __/___/__ 4. Return Loss Module ___________ _________ __/___/__ 5. Connector Interface ___________ _________ __/___/__ 6. Single Mode Fiber ___________ _________ __/___/__ 7.
Test Record Performance Tests Agilent Optical Attentuator Module Report No. ________ Date_______ Insertion Loss Test Product 81560A + 81561A 81566A + 81567A 1.7 dB 2.2 dB > 2.2 dB > 2.7 dB Measurement Supplementary Characteristic Rejection Limit Attenuation Accuracy Test Setting /dB Reading /dB Deviation /dB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 25 35 45 55 60 Maximum peak-to-peak Deviation Specification Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 0.
Performance Tests Test Record Agilent Optical Attenuator Module Performance Test Page 4 of 8 Agilent Optical Attentuator Module Report No. ________ Date_______ Attenuation Repeatability Test Setting /dB Deviation /dB 1 7 15 24 32 40 48 54 60 Maximum peak-to-peak Deviation Specification 0.02 dBpp Power Setting Repeatability Test Power Setting /dB Deviation /dB 0 dBm -25 dBm -50 dBm Maximum peak-to-peak Deviation Specification 60 0.
Test Record Performance Tests Return Loss Test Product 81560A + 81566A 81561A + 81567A Open Open Closed Closed Supplementary Characteristic > 45 dB > 60 dB Rejection Limit < 42 dB < 57 dB Attenuation Setting Shutter State Measurement Input Port Measurement Output Port Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 61
Performance Tests Test Record Agilent Optical Attenuator Module Performance Test Page 6 of 8 Agilent Optical Attentuator Module Report No. ________ Date_______ Polarization Dependent Loss Test - Scanning Method (11896A) Product 81560A +81561A 81566A +81567A < 0.05 dBpp < 0.
Test Record Performance Tests λ/2 Plate Setting n/a Measurement P1 deg P2 deg P3 deg P4 Reference Power µW µW µW µW DUT Power µW µW µW µW Mueller Coefficients m11 = (PDUT1 / PREF1 + PDUT2 / PREF2)/2 = m12 = (PDUT1 / PREF1 - PDUT2 / PREF2)/2 = m13 = (PDUT3 / PREF3) - m11 = m14 = (PDUT4 / PREF4) - m11 = Minimum and Maximum Transmission = Tmax = m11 + m122 + m132 + m142 Tmax = = m11 − m122 + m132 + m142 Product 81560A + 81561A 81566A + 81567A < 0.05 dBpp < 0.
Performance Tests Test Record Agilent Optical Attenuator Module Performance Test Page 8 of 8 Agilent Optical Attentuator Module Report No. ________ Date_______ Relative Power Meter Uncertainty Test 8156xA [PSET] /dBm Reference Attenuation /dB Reference Reading 1 /dB 0 55 0 -5 50 -10 45 -15 40 -20 35 -25 30 -30 25 -35 20 -40 15 -45 10 -50 5 -55 0 Reference Reading 2 /dB Maximum peak-to-peak deviation Specification 64 0.
Cleaning Information Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition 65
Cleaning Information The following Cleaning Information contains some general safety precautions, which must be observed during all phases of cleaning. Consult your specific optical device manuals or guides for full information on safety matters. Please try, whenever possible, to use physically contacting connectors, and dry connections. Clean the connectors, interfaces, and bushings carefully after use.
Safety Precautions Cleaning Information Safety Precautions Please follow the following safety rules: • Do not remove instrument covers when operating. • Ensure that the instrument is switched off throughout the cleaning procedures. • Use of controls or adjustments or performance of procedures other than those specified may result in hazardous radiation exposure. • Make sure that you disable all sources when you are cleaning any optical interfaces.
Cleaning Information What do I need for proper cleaning? Furthermore, the power density may burn dust into the fiber and cause additional damage (for example, 0 dBm optical power in a single mode fiber causes a power density of approximately 16 million W/m2). If this happens, measurements become inaccurate and non-repeatable. Cleaning is, therefore, an essential yet difficult task.
What do I need for proper cleaning? Cleaning Information We suggest these protective coverings should be kept on the equipment at all times, except when your optical device is in use. Be careful when replacing dust caps after use. Do not press the bottom of the cap onto the fiber too hard, as any dust in the cap can scratch or pollute your fiber surface. If you need further dust caps, please contact your nearest Agilent Technologies sales office.
Cleaning Information What do I need for proper cleaning? Soft tissues These are available from most stores and distributors of medical and hygiene products such as supermarkets or chemists' shops. We recommend that you do not use normal cotton tissues, but multilayered soft tissues made from non-recycled cellulose. Cellulose tissues are very absorbent and softer. Consequently, they will not scratch the surface of your device over time.
What do I need for proper cleaning? Cleaning Information When spraying compressed air, hold the can upright. If the can is held at a slant, propellant could escape and dirty your optical device. First spray into the air, as the initial stream of compressed air could contain some condensation or propellant. Such condensation leaves behind a filmy deposit. Please be friendly to your environment and use a CFC-free aerosol.
Cleaning Information What do I need for proper cleaning? Only use isopropyl alcohol in your ultrasonic bath, as other solvents may cause damage. Warm water and liquid soap Only use water if you are sure that there is no other way of cleaning your optical device without causing corrosion or damage. Do not use hot water, as this may cause mechanical stress, which can damage your optical device. Ensure that your liquid soap has no abrasive properties or perfume in it.
Preserving Connectors Cleaning Information Preserving Connectors Listed below are some hints on how best to keep your connectors in the best possible condition. Making Connections Before you make any connection you must ensure that all cables and connectors are clean. If they are dirty, use the appropriate cleaning procedure. When inserting the ferrule of a patchcord into a connector or an adapter, make sure that the fiber end does not touch the outside of the mating connector or adapter.
Cleaning Information Which Cleaning Procedure should I use ? Which Cleaning Procedure should I use ? Light dirt If you just want to clean away light dirt, observe the following procedure for all devices: • Use compressed air to blow away large particles. • Clean the device with a dry cotton swab. • Use compressed air to blow away any remaining filament left by the swab. Heavy dirt If the above procedure is not enough to clean your instrument, follow one of the procedures below.
How to clean connector adapters Cleaning Information To assess the projection of the emitted light beam you can use an infrared sensor card. Hold the card approximately 5 cm from the output of the connector. The invisible emitted light is projected onto the card and becomes visible as a small circular spot. Preferred Procedure Use the following procedure on most occasions. 1 Clean the connector by rubbing a new, dry cotton swab over the surface using a small circular movement.
Cleaning Information Preferred Procedure How to clean connector interfaces Use the following procedure on most occasions. 1 Clean the adapter by rubbing a new, dry cotton swab over the surface using a small circular movement. 2 Blow away any remaining lint with compressed air. Procedure for Stubborn Dirt Use this procedure when there is greasy dirt on the adapter: 1 Moisten a new cotton swab with isopropyl alcohol.
How to clean bare fiber adapters Cleaning Information 3 Moisten a new cotton swab with isopropyl alcohol. 4 Clean the interface by rubbing the cotton swab over the surface using a small circular movement. 5 Using a new, dry pipe cleaner, and a new, dry cotton swab remove the alcohol, any dissolved sediment and dust. 6 Blow away any remaining lint with compressed air. How to clean bare fiber adapters Bare fiber adapters are difficult to clean. Protect from dust unless they are in use.
Cleaning Information How to clean lenses How to clean lenses Some lenses have special coatings that are sensitive to solvents, grease, liquid and mechanical abrasion. Take extra care when cleaning lenses with these coatings. Lens assemblies consisting of several lenses are not normally sealed. Therefore, use as little alcohol as possible, as it can get between the lenses and in doing so can change the properties of projection. Preferred Procedure Use the following procedure on most occasions.
How to clean instruments with an optical glass plate Cleaning Information If there are fluids or fat in the connector, please refer the instrument to the skilled personnel of Agilent’s service team. CA U TI O N Only use clean, dry compressed air. Make sure that the air is free of dust, water, and oil. If the air that you use is not clean and dry, this can lead to filmy deposits or scratches on the surface of your connector interface. This will degrade the performance of your transmission system.
Cleaning Information WARNING How to clean instruments with a recessed lens interface Never look into an optical output, because this can seriously damage your eyesight. To assess the projection of the emitted light beam you can use an infrared sensor card. Hold the card approximately 5 cm from the interface. The invisible emitted light is projected onto the card and becomes visible as a small circular spot. Preferred Procedure Use the following procedure on most occasions.
How to clean optical devices which are sensitive to mechanical stress and pressure Preferred Procedure Cleaning Information Use the following procedure on most occasions. 1 Blow away any dust or dirt with compressed air. If this is not sufficient, then 2 Clean the interface by rubbing a new, dry cotton swab over the surface using a small circular movement. 3 Blow away any remaining lint with compressed air.
Cleaning Information How to clean metal filters or attenuator gratings procedure is time-consuming, but you avoid scratching or destroying the surface. 1 Put the film on the surface and wait at least 30 minutes to make sure that the film has had enough time to dry. 2 Remove the film and any dirt with special adhesive tapes. Alternative Procedure For these types of optical devices you can often use an ultrasonic bath with isopropyl alcohol.
Additional Cleaning Information Cleaning Information Additional Cleaning Information The following cleaning procedures may be used with other optical equipment: • How to clean bare fiber ends • How to clean large area lenses and mirrors How to clean bare fiber ends Bare fiber ends are often used for splices or, together with other optical components, to create a parallel beam. The end of a fiber can often be scratched. You make a new cleave. To do this: 1 Strip off the cladding.
Cleaning Information Additional Cleaning Information Only use water if you are sure that there is no other way of cleaning your optical device without causing corrosion or damage. Do not use hot water, as this may cause mechanical stress, which can damage your optical device. Ensure that your liquid soap has no abrasive properties or perfume in it. You should also avoid normal washing up liquid, as it can cover your device in an iridescent film after it has been air dried.
Other Cleaning Hints Cleaning Information Other Cleaning Hints Selecting the correct cleaning method is an important element in maintaining your equipment and saving you time and money. This Appendix highlights the main cleaning methods, but cannot address every individual circumstance. This section contain some additional hints which we hope will help you further. For further information, please contact your local Agilent Technologies representative.
Cleaning Information 86 Other Cleaning Hints Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
Index Index A Attenuator 17 C Cleaning 65 Connectors angled contact 22, 28 straight contact 22 Conventions 7 D Definition of Terms 31 Absolute Wavelength Accuracy 32 F Front Panel Agilent 81689A 18, 19 Agilent 81689B 18, 19 Controls and Indicators 18, 19 G Getting Started 15 I Inspection 3 L Line Power 4 O Optical Output 22 Optional features 25 P Performance Tests 40 Instructions 43 Polarization Maintaining Fiber 22 S Safety symbols 3 U Use Models 20 User’s Guides 26 Agilent 81560A, 81561A, 81566A, & 8156
Agilent 81560A, 81561A, 81566A, & 81567A Optical Attenuator Modules, First Edition
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