Agilent 81618A/9A Optical Head Interface Modules and Agilent 81622B/3B/4B/6B/7B/8B Optical Heads 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 be reproduced in any form or by any means (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 2000 by: Agilent Technologies Deutschland GmbH Herrenberger Str.
Safety Considerations 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. Agilent Technologies Inc. assumes no liability for the customer’s failure to comply with these requirements.
Safety Considerations Agilent Technologies Deutschland GmbH will not be liable for any damage caused by operation above 34 dBm. 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.
Table of Contents Table of Contents Safety Considerations 3 Safety Symbols Input Power Limitations Initial Inspection Line Power Requirements Operating Environment Storage and Shipment Getting Started with Optical Heads What is an Optical Head? Analog Output Optical input Heat Sink for 81628B optical Head Attaching the heat sink to the 81628B Optical Head Applicable adapters Mounting Instructions Accessories 3 3 4 4 4 4 9 11 12 12 12 13 13 13 15 Modules and Options 17 Optical Heads 81622B/23B/24B/2
Table of Contents Return loss Spectral width of optical source Total uncertainty Uncertainty at reference conditions Wavelength range Optical Head Specifications Supplementary Performance Characteristics Analog Output Performance Tests 26 26 26 26 27 33 33 35 Equipment Required Test Record Test Failure Instrument Specification Functional Tests Performance Tests For 81628B only Accuracy Test Linearity Test Calculation Noise Test Return Loss Test Relative Uncertainty due to Polarization (Optional Test)
Table of Contents Soft tissues Pipe cleaner Compressed air Additional Cleaning Equipment Microscope with a magnification range about 50X up to 300X Ultrasonic bath Warm water and liquid soap Premoistened cleaning wipes Polymer film Infrared Sensor Card Preserving Connectors Cleaning Instrument Housings Which Cleaning Procedure should I use ? 93 93 93 94 94 94 95 95 95 95 96 96 97 How to clean connectors 97 How to clean connector adapters 98 How to clean connector interfaces 99 How to clean bare fiber a
Table of Contents 8 Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Getting Started with Optical Heads Getting Started with Optical Heads Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 9
Getting Started with Optical Heads This chapter introduces the features of the Agilent 81622B/3B/4B/6B/7B/8B Optical Heads.
What is an Optical Head? Getting Started with Optical Heads What is an Optical Head? An optical head measures the power emitted from a connected singlemode or multi-mode fiber or the power applied in an open parallel beam (with max. 5 mm diameter). The wavelength and power range depends on the sensor element.
Getting Started with Optical Heads What is an Optical Head? Analog Output The analog output is the BNC connector on the back of the optical head. It outputs a voltage directly proportional to the strength of the optical signal at the optical input in the current range. The analog signal is always in the range between 0 and 2V, 2V corresponding to a full power input signal in the current range, 0V corresponding to no input signal. During autoranging, the level to which 2V corresponds changes.
What is an Optical Head? Getting Started with Optical Heads Attaching the heat sink to the 81628B Optical Head NOTE Always attach the heat sink and rubber ring to the 81628B if operating at an optical power higher than 34dBm! Applicable adapters Agilent adapters types 81000xx, except the bare fiber adapter (81000BA), are applicable with the 81628B and the heat sink attached (without the heatsink and up to 34dBm the 81000BA bare fiber adapter may be attached).
Getting Started with Optical Heads Figure 5 What is an Optical Head? Attaching the Bottom Part of the Heat Sink 3 Attach the upper part of the heat sink to the integrating sphere. Slide the upper part over the connector adapter with the largest diameter facing opposite to the sphere. Tighten the screws with the Allen key enclosed in the Heat Sink Kit (see Figure 6).
Accessories Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 15
Accessories The Agilent 81618A/9A Optical Head Interface Modules and Agilent 81622B/3B/4B/6B/7B/8B Optical Heads 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 Optical Heads 81622B/23B/24B/26B/28B (5 & 3 mm Sensors) Connectorized Fiber, Bare Fiber and Open beam NA= 0.
Accessories Modules and Options Optical Head 81627B - 3 mm Sensor C on fig u ra tio n fo r c o n n ec to rize d fib ers a nd b a re fib er Accessories 81624CE 4m extension cable 81624RM * Half-rack Mount Kit for 2 Heads 81625RM * Rack Mount Kit for 4 Heads Interface Module Interface Modules Optical Head Optical Heads Connector Adapters with integral D-Adapter 81618A 81619A 81627B Connector Adapters (with intergral D-Shape) 81001BA 81001FA 81001KA 81001LA 81001MA 81001PA 81001SA 81001ZA Bare Fib
Modules and Options Accessories Connector Adapters - Reference List Preferred Adapters Integral D-shape for 5 mm optical heads Integral D-shape for 3mm and 5mm optical heads Connector Type Threaded Version HMS10 Barefiber FC/PC NEC D4 SC/PC MU MT-RJ E-2000 DIN ST blank 81000AA 81000BA opt. 002 81000FA 81000GA 81000KA 81000MA 81000PA 81000SA 81000VA 81000ZA 810001ZA LC 810003LA 810001LA 810000BA opt.
Accessories 20 Modules and Options Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Specifications Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 21
Specifications The Agilent 81618A/9A Optical Head Interface Modules and Agilent 81622B/3B/4B/6B/7B/8B Optical Heads 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’ and heads’ warranted performance. Supplementary performance characteristics describe the modules’ and heads’ 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 35. 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. Averaging Time Time defining the period during which the power meter takes readings for averaging.
Specifications Definition of Terms Linewidth FWHM spectral bandwidth. The 3 dB width of the optical spectrum, expressed in Hertz. Symbol: ∆f. Noise The peak-to-peak change of displayed power level with zero input power level (dark). Conditions: Zero prior to measurement, averaging time and observation time as specified, lowest power range selected and wavelength range as specified.
Definition of Terms Specifications Conditions: constant wavelength, constant power level, angled connector as specified, linewidth of source <100 MHz, temperature as specified. NOTE Spectral ripple is measured by stepping the source wavelength over the wavelength range specified. Relative uncertainty due to speckle noise This is the uncertainty of the power reading when using a coherent source.
Specifications Definition of Terms Return loss The ratio of the incident power to the reflected power expressed in dB. Symbol: RL. Pin RL = 10 log æè -------------öø P back Conditions: the return loss excludes any reflections from the fiber end used as radiation source. Spectral width of optical source Full width at half maximum. The 3 dB width of the optical spectrum, expressed in nm. Symbol: FWHM.
Optical Head Specifications Specifications Optical Head Specifications All optical heads have to be operated with the single (Agilent 81618A) or dual (Agilent 81619A) Interface Modules.
Specifications Optical Head Specifications Table 2 Optical Head Specifications Agilent 81623B Agilent 81624B Warm-up time Agilent 81627B 40 minutes 1 Reference Conditions: • Power level 10 µW (-20 dBm), continuous wave (CW) • Parallel beam, 3 mm spot diameter on the center of the detector • Ambient temperature 23 °C ± 5 °C • On day of calibration (add ± 0.3% for aging over one year; add ± 0.
Optical Head Specifications Specifications . Table 3 High Power Optical Head Specifications Sensor Element Wavelength Range Power Range Agilent 81622B Agilent 81626B Ge, Ø 5 mm InGaAs, Ø 5 mm 850 - 1650 nm 850 - 1650 nm +27 to -55 dBm (1250 - 1650 nm) +27 to -70 dBm (1250 - 1650 nm) +23 to -55 dBm (850 - 1650 nm) +23 to -70 dBm (850 - 1650 nm) Standard SM and MM max 100 µm core size, NA ≤ 0.
Specifications Optical Head Specifications Notes: Agilent 81622B 1 Agilent 81626B Reference Conditions: • Power level 10 µW (-20 dBm), continuous wave (CW) • Parallel beam, 3 mm spot diameter on the center of the detector (center of sphere input for 81628B) • Ambient temperature 23 °C ± 5 °C • On day of calibration (add ± 0.3% for aging 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.
Optical Head Specifications Specifications Table 4 Agilent 81628B Specification Agilent 81628B with integrating sphere Sensor Element InGaAs, Ø 3 mm Wavelength Range 800 - 1700 nm Power Range +40 to -60 dBm (800 - 1700 nm) For operation higher than 34 dBm see safety note. Damage Power 40.5 dBm SM NA ≤ 0.2, MM NA ≤ 0.4 Applicable Fiber Type Open Beam Ø 3 mm center of sphere Uncertainty at Reference Conditions 1, 8 ±3.0% (970 to 1630 nm) ≤ 10 dBm ±4 % ± 5 nW >10 dBm to ≤20 dBm ±4.
Specifications Optical Head Specifications Agilent 81628B 1 Reference Conditions: • Power level 10 µW (-20 dBm), continuous wave (CW) • Parallel beam, 3 mm spot diameter on the center of sphere input • Ambient temperature 23 °C ± 5 °C • On day of calibration (add ± 0.3% for aging 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.
Supplementary Performance Characteristics Specifications Supplementary Performance Characteristics Analog Output Bandwith ≥DC, ≤300 to 5000 Hz depending on range and optical head. Output voltage 0 to 2 V non-terminated Output impedance 600 Ohm typ. Max. input voltage ±10V Table 5 3dB-bandwidth of the Analog Output Range Bandwidth 81622B/3B Bandwidth 81624B/6B/7B Bandwidth 81628B +40 dBm N/A N/A 3.5 kHz +30 dBm N/A N/A 3.5 kHz +20 dBm N/A N/A 3.5 kHz +10 dBm 5.0 kHz 5.0 kHz 3.
Specifications 34 Supplementary Performance Characteristics Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Performance Tests Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 35
Performance Tests The procedures in this section test the performance of the instrument. The complete specifications to which Agilent 81622B/3B/4B/6B/7B/8B Optical Heads are tested are given in “Specifications” on page 21. All tests can be performed without access to the interior of the instrument. The test equipment given corresponds to tests carried out with Diamond HMS - 10 connectors.
Equipment Required Performance Tests 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.
Performance Tests Test Record Instrument/Accessory Recommended Model 81619A 81622B 81623B 81624B 81626B 81627B Optical Head 81618A Interface Singlemode Fiber – – – – – – – – – – – – – – – – – – – – – – – – – – – – x – – x x x x – x – x x x x x – – x x x x – x – x x x x x – – x x x x – x – x x x x x – – x x x x – x – x x x x x* x – x x – – x x* x x x x x Connector Adapters Connector Interfaces Plastic Cap Agilent 81101AC (2/1* ea) Agilent 81101PC (1 ea) Agilent 81102SC (1 ea) Agilent 8
Test Failure Performance Tests Test Failure If the Agilent 81618A/19A Interface module or Agilent 81622B/3B/4B/6B/7B/8B Optical Head fails any performance test, return the instrument to the nearest Agilent Technologies Sales / Service Office for repair. Instrument Specification Specifications are the performance characteristics of the instrument that is certified.
Performance Tests Functional Tests Functional Tests The functional test applies to the Agilent 81618A/19A Interface modules. Mainframe 8163A/B with 8161xA Interface Module as DUT Figure 9 Functional Test Setup 1 Set up the equipment as shown in Figure 9 2 If you are using an Agilent 81619A Interface module connect one optical head to channel 1 and the other to channel 2 3 Power up the mainframe. If the Agilent 81618A/19A passes all self-tests, the module is considered fully functional.
Performance Tests Performance Tests Performance Tests The performance tests given in this section includes the Accuracy Test, the Linearity Test, the Return Loss Test (for the 81622B/23B/26B/ and 27B) and the Noise Test. The performance tests for the Agilent 81624B/6B also include – as optional tests – the Relative Polarization Uncertainty and the Relative Interference Uncertainty Test. Perform each step in the order given, using the corresponding test equipment.
Performance Tests Performance Tests The thermal characteristics of the sphere do not change from device to device, or during the product lifetime. If a head without the sphere passes the linearity test within the specifications given on the Test Record Sheet, then the whole system - sphere and head - is within the product specification.
Performance Tests Performance Tests Accuracy Test This performance test applies to Agilent 81622B/3B/4B/6B/7B/8B Optical Heads. 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 10.0 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 10. 1.
Performance Tests Performance Tests 3 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 an Agilent 81657A Laser Source make sure you initialize the Agilent 8156A Optical Attenuator with 30 dB attenuation. 5 Turn the instruments on, enable the laser source and allow the instruments to warm up for at least 20 minutes.
Performance Tests Performance Tests Linearity Test This performance test applies to Agilent 81622B/3B/4B/6B/7B/8B Optical Heads NOTE 81628B only: You have to disconnect the integrating sphere of the 81628B head to verify the linearity. The linearity specification of the 81627B head applies to the 81628B without the integrating sphere. Use the 81102SC high return loss patchcord to connect the DUT to the attenuator.
Performance Tests Performance Tests Perform the test until the power reading of the DUT shows: for 81622B: -27.x dBm for 81623B: -47.x dBm for 81624B: -57.x dBm for 81626B: -37.x dBm for 81627B: -57.x dBm for 81628B: -57.x dBm (without sphere) 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 11.
Performance Tests Performance Tests 8 Perform the following sub-procedure for the reference Power Meter, 81634B: a Press [Menu], move to , move to , and press Enter. b Move to , press Enter, move to <-50 dBm>, press Enter, and press [Close]. 9 Perform the following sub-procedure for the DUT, 8162xB: a Press [Menu], move to , move to , and press Enter. b Move to , press Enter, move to <10 dBm>(40 dBm for 81628B), and press Enter.
Performance Tests Performance Tests 0 dBm Range (equivalent to +30 dBm range for 81628B) 18 Disable Atty1. 19 Zero both Power Meters. On the 8163A/B with two installed power meters, press [Menu], move to , and press Enter. 20 Enable Atty1. 21 Switch one range up to the +10 dBm range (+40dBm for 81628). 22 Note both power readings (#3). 23 Switch down to the previous range (0 dBm, 30 dBm for the 81628B) and note the values again (#4).
Performance Tests Performance Tests 36 Decrease the attenuation of Atty2 to 10 dB in order to be on the upper limit of the -50 dBm range at the reference power meter. -20 dBm Range (equivalent to +10 dBm range for 81628B) 37 Disable Atty1. 38 Zero both Power Meters. On the 8163A/B with two installed power meters, press [Menu], move to , and press Enter. 39 Enable Atty1. 40 Switch one range up to the -10 dBm (20 dBm for the 81628B) range and note the power readings (#9).
Performance Tests Performance Tests Change Setup 53 Disable Atty1 and switch the output with the monitor output. 54 Set the attenuation of Atty1 to 35 dB and of Atty2 to 25 dB. 55 Enable Atty1 again. 56 Adjust the attenuation of both attenuators in the following order: • Atty1: DUT Power Meter shows a reading of -37.2 dBm. • Atty2: the REF Power Meter shows a reading of -47.2 dBm. -40 dBm Range (equivalent to -10 dBm range for 81628B) 57 Disable Atty1. 58 Zero both Power Meters.
Performance Tests Performance Tests 71 Increase the attenuation of Atty1 by 10 dB and note the results in the test record (#20). Calculation 72 Calculate the non-linearity using the formulas given in the test record. Example: Measurement Results Information only Atty1 / #221 Atty2 / #100 Your Entries DUT Range REF DUT Power [dBm] Power [dBm] [dBm] Notes n [dB] [dB] 1 0 42 10 -47,1915 9,4273 1.
Performance Tests Performance Tests Calculations Conversion [dBm] → [mW] n Ref / R DUT / D [mW] [mW] Calculation as given Relation1 / A Calculation as given Relation2 / B Non-Linearity = An*Bn (NLn±1+1) - 1 [%] 8,76455761 0,2199125 4,5505092 0,1 2 4,19856E-06 1,926060834 3 1,87845E-05 1,928590397 1,0003454 0,9995626 0,03 4 1,8791E-05 1,929434323 0,1006955 5 1,89217E-06 0,194352441 6 1,8896E-05 0,194455396 1,0003685 7 1,8903E-05 0,194549447 0,1000046 10,002994 0,09
Performance Tests Performance Tests Nonlinearity [%] Linearity of 81624B 3.00% 2.00% 1.00% 0.00% -1.00% -2.00% -3.00% -60 -50 -40 -30 -20 -10 0 10 Optical Pow er [dBm ] Figure 12 Example of Linearity Test Result.
Performance Tests Performance Tests Noise Test This performance test applies to Agilent 81622B/3B/4B/6B/7B/8B Optical Heads. N O TE You must insert a module or a blank panel in the second channel position of the Agilent 8163A/B Lightwave Multimeter before you perform the noise measurement.
Performance Tests Performance Tests Return Loss Test This performance test applies to Agilent 81622B/3B/4B/6B/7B Optical Heads. 1 Make sure that all connectors are clean. 2 Connect the equipment as shown in Figure 13. 3 Press [Preset] on the mainframe. Figure 13 NOTE CA U TI O N Return Loss Reference Setup To ensure traceability, use the 81610CC Reference Cable for calibration measurements. Do not use the 81610CC Reference Cable for measurements on a Device Under Test.
Performance Tests Performance Tests b Set the wavelength [λ] to the wavelength of the RTL source. c Set [Pwr unit] to . 7 At the Return Loss Module: a Set the averaging time [AvTime] to 1s. b Enter the Return Loss Reference value RLref of the 81610CC reference cable for this wavelength. c Press [RefCal to calibrate the Return Loss module at reference condition. 8 At the Power Meter press [Disp -> Ref]. The Power Meter should now read 0.0 dB.
Performance Tests Performance Tests 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 is unchanged by normal use of the sensor module. Refer to Figure 15 for a setup to verify the relative uncertainty due to polarization of the sensor module.
Performance Tests Performance Tests GPIB Mainframe 8164A /B 8164A/B Mainframe 8163A/B w/ 81533B and 81521B Optical Head (Ref, special) 81682A 20 dB 1% 99% 8163A/B 81533B Approved IF free and low PDL optical head (special tool) Note 81521B Best IF Adapter DIN 4108 angled connector (81113SC) Mainframe 8163A/B w/ 81618A and 8162xB Optical Head (DUT) Polarization Ctrl 11896A 81618A 11896 8163A/B Optical Head (DUT) 8162xB straight connector Figure 15 58 Measurement Setup for PDL Tes
Performance Tests Performance Tests 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 is unchanged by normal use of the sensor module. Refer to Figure 16 for a test setup to verify the relative uncertainty due to interference within the optical head optical assembly.
Performance Tests Performance Tests GPIB Mainframe 8164A/B Mainframe 8163A/B w/ 81618A and 8162xB Optical Head (DUT) 8164A/B 81618A 8163A/B 81682A Optical Head (DUT) 8162xB DIN 4108 angled connector (81113SC) Best IF Adapter Approved IF free optical head (special tool) Figure 16 60 Mainframe 8163A/B w/ 81533B and 81521B Optical Head (Ref, special) 81533B 8163A/B 81521B Note Worst IF Adapter 3 dB Setup for Relative Uncertainty due to Interference Measurement Agilent 81618A/9A and A
Performance Tests Performance Tests Theoretically, both Power Meters are monitoring the power ratio over the variable wavelength in a predefined range as shown in Figure 17. Ensure that the tunable laser source is mode-hop free in the tested wavelength range. [dB] A B max.
Performance Tests 62 Performance Tests Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Performance Tests Performance Tests Performance Test for the Agilent 81622B Page 1 of 3 Model Agilent 81622B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Tests Performance Test for the Agilent 81622B Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81622B Page 3 of 3 Model Agilent 81622B Optical Head Report No.________ Date ________________ Test No. Test Description Min. Spec. Max. Spec. I Accuracy Test II III Result [µW] measured at _______ nm (1310nm) Output Power 9.64 µW _______ 10.36 µW measured at _______ nm (1550nm) Output Power 9.64 µW _______ 10.
Performance Tests Performance Tests N O TE 66 The nonlinearity of the 81622B is not regularly tested up to the specified power level of +27 dBm. Instead, limited testing up to +9 dBm is used to test the electronic circuitry of the 81622B. Above +9 dBm, the largest contribution to nonlinearity comes from the absorbing glass filter (which is tested on a sample basis) that does not change its nonlinearity with time.
Performance Tests Performance Tests Performance Test for the Agilent 81623B Page 1 of 3 Model Agilent 81623B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Tests Performance Test for the Agilent 81623B Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81623B Page 3 of 3 Model Agilent 81623B Optical Head Report No.________ Date ________________ Test No. Test Description Min. Spec. Max. Spec. I Accuracy Test II III Result [µW] measured at _______ nm (1310nm) Output Power 9.72 µW _______ 10.28 µW measured at _______ nm (1550nm) Output Power 9.72 µW _______ 10.
Performance Tests 70 Performance Tests Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Performance Tests Performance Tests Performance Test for the Agilent 81624B Page 1 of 3 Model Agilent 81624B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Tests Performance Test for the Agilent 81624B Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81624B Page 3 of 3 Model Agilent 81624B Optical Head Report No.________ Date ________________ Test No. Test Description Min. Spec. Max. Spec. I Accuracy Test II III Result [µW] measured at _______ nm (1310nm) Output Power 9.72 µW _______ 10.28 µW measured at _______ nm (1550nm) Output Power 9.72 µW _______ 10.
Performance Tests 74 Performance Tests Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Performance Tests Performance Tests Performance Test for the Agilent 81626B Page 1 of 3 Model Agilent 81626B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Tests Performance Test for the Agilent 81626B Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81626B Page 3 of 3 Model Agilent 81626B Optical Head Test No. Test Description I Accuracy Test II III Report No.________ Date ________________ Min. Max. Measurement Spec. Uncertainty Spec. Result [µW] measured at _______ nm (1310nm) Output Power 9.64 µW _______ 10.36 µW measured at _______ nm (1550nm) Output Power 9.64 µW _______ 10.
Performance Tests Performance Tests N O TE 78 The nonlinearity of the 81626B is not usually tested to the specified power level of +27 dBm. Instead, limited testing up to +9 dBm is used to test the electronic circuitry of the 81626B. Above +9 dBm the largest contribution to nonlinearity is from the absorbing glass filter (which is tested on a sample basis) that does not change its linearity with time.
Performance Tests Performance Tests Performance Test for the Agilent 81627B Page 1 of 3 Model Agilent 81627B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Tests Performance Test for the Agilent 81627B Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81627B Page 3 of 3 Model Agilent 81627B Optical Head Report No.________ Date ________________ Test No. Test Description Min. Spec. Max. Spec. I Accuracy Test II III Result [µW] measured at _______ nm (1310nm) Output Power 9.69 µW _______ 10.31 µW measured at _______ nm (1550nm) Output Power 9.69 µW _______ 10.
Performance Tests Performance Tests Performance Test for the Agilent 81628B Page 1 of 3 Model Agilent 81628B Optical Head_ Date Serial No. _________________________ Ambient Temperature ___________°C Options _________________________ Relative Humidity ___________ % Firmware Rev.
Performance Tests Performance Test for the Agilent 81628B Performance Tests Test Equipment Used Page 2 of 3 Description Model No. Trace No Cal. Due Date 1a1 Lightwave Multimeter (Std.
Performance Tests Performance Tests Performance Test for the Agilent 81628B Page 3 of 3 Model Agilent 81628B Optical Head Report No.________ Date ________________ Test No. Test Description Min. Spec. Max. Spec. I Linearity Test (without sphere) For Calculations you may want to use the appropriate sheet II III Result Range PDUT [dBm] PDUT [dBm] Loss [%] +40 +9 ________ _______ <± 0.46 % +40 +3 ________ _______ <± 0.46 % +30 +3 ________ _______ <± 0.
Performance Tests Performance Tests Calculation Sheets Table 7 Calculation Sheet for Linearity Measurement (81623B, 81624B, 81627B, 81628B) Calculation as given Conversion [dBm] → [mW] REF Power DUT Power Ref / R DUT / D Relation1 / A Relation2 / B [mW] [mW] [dBm] [dBm] = R n+1/R n = Dn/Dn+1 Your Entries n Calculation as given Non-Linearity = A n*Bn (NLn±1+1) - 1 =Dn/Rn+1 =Rn+1/Rn [%] Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 0.
Performance Tests Performance Tests Table 8 Calculation Sheet for Linearity Measurement (81622B, 81626B) Calculation as given Conversion [dBm] → [mW] REF Power DUT Power Ref / R DUT / D Relation1 / A Relation2 / B [mW] [mW] [dBm] [dBm] = R n+1/R n = Dn/Dn+1 86 Calculation as given Non-Linearity =Dn/Rn+1 = A n*Bn (NLn±1+1) - 1 [%] Reference Level 0.
Cleaning Information Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition 87
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.
Cleaning Instructions for this Device Cleaning Information Cleaning Instructions for this Device This Cleaning Information applies to a number of different types of Optical Equipment. Sections of particularly relevance to the following devices are crossreferenced below. 81000xA Optical Head Adapters When using optical head adapters, periodically inspect the optical head's front window (see “How to clean connector adapters” on page 98 for cleaning procedures).
Cleaning Information Safety Precautions 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.
What do I need for proper cleaning? Cleaning Information 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.
Cleaning Information What do I need for proper cleaning? 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.
What do I need for proper cleaning? Cleaning Information 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.
Cleaning Information What do I need for proper cleaning? 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.
What do I need for proper cleaning? Cleaning Information 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.
Cleaning Information Preserving Connectors 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.
Which Cleaning Procedure should I use ? Cleaning Information 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.
Cleaning Information Preferred Procedure Which Cleaning Procedure should I use ? 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. 2 Blow away any remaining lint with compressed air. Procedure for Stubborn Dirt Use this procedure when there is greasy dirt on the connector: 1 Moisten a new cotton swab with isopropyl alcohol.
Which Cleaning Procedure should I use ? Cleaning Information 3 Take a new, dry soft tissue and remove the alcohol, dissolved sediment and dust, by rubbing gently over the surface using a small circular movement. 4 Blow away any remaining lint with compressed air. How to clean connector interfaces CA U TI O N Be careful when using pipe cleaners, as the core and the bristles of the pipe cleaner are hard and can damage the interface.
Cleaning Information Which Cleaning Procedure should I use ? • Deposit dissolved dirt in the groove, which can then dirty the surface of an inserted fiber. Preferred Procedure Use the following procedure on most occasions. 1 Blow away any dust or dirt with compressed air. Procedure for Stubborn Dirt Use this procedure when there is greasy dirt on the adapter: 1 Clean the adapter by pushing and pulling a new, dry pipe cleaner into the opening. Rotate the pipe cleaner slowly as you do this.
Which Cleaning Procedure should I use ? Cleaning Information How to clean instruments with a fixed connector interface You should only clean instruments with a fixed connector interface when it is absolutely necessary. This is because it is difficult to remove any used alcohol or filaments from the input of the optical block. It is important, therefore, to keep dust caps on the equipment at all times, except when your optical device is in use.
Cleaning Information WARNING Which Cleaning Procedure should I use ? 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.
Which Cleaning Procedure should I use ? Cleaning Information 3 Blow away any remaining lint with compressed air. Procedure for Stubborn Dirt Use this procedure when there is greasy dirt on the interface, and using the preferred procedure is not sufficient. Using isopropyl alcohol should be your last choice for recessed lens interfaces because of the difficulty of cleaning out any dirt that is washed to the edge of the interface: 1 Moisten a new cotton swab with isopropyl alcohol.
Cleaning Information Additional Cleaning Information If there are any streaks or drying stains on the surface, repeat the cleaning procedure. How to clean metal filters or attenuator gratings This kind of device is extremely fragile. A misalignment of the grating leads to inaccurate measurements. Never touch the surface of the metal filter or attenuator grating. Be very careful when using or cleaning these devices.
Additional Cleaning Information Cleaning Information 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. 2 Take a new soft tissue and moisten it with isopropyl alcohol. 3 Carefully clean the bare fiber with this tissue.
Cleaning Information Other Cleaning Hints If you are not sure how sensitive your device is to cleaning, please contact the manufacturer or your sales distributor. 1 Moisten the lens or the mirror with water. 2 Put a little liquid soap on the surface and gently spread the liquid over the whole area. 3 Wash off the emulsion with water, being careful to remove it all, as any remaining streaks can impair measurement accuracy.
Other Cleaning Hints Making the connection Cleaning Information Before you make any connection you must ensure that all lightwave cables and connectors are clean. If not, then use the appropriate cleaning methods. When you insert the ferrule of a patchcord into a connector or an adapter, ensure that the fiber end does not touch the outside of the mating connector or adapter. Otherwise, the fiber end will rub up against something which could scratch it and leave deposits.
Cleaning Information 108 Other Cleaning Hints Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
Index Index A P U Accuracy Test 43 Performance characteristics supplementary 33 Uncertainty 25 polarization 25 spectral ripple 24 Accuracy test Setup 43 Analog output 12 bandwidth 33 Attaching the heat sink 13 Averaging time 23 C Calculation sheet linearity test 85 Cleaning 89 Cleaning connector interfaces 99 Cleaning materials 91 Performance Tests 81622B 63 81623B 67 81624B 71 81626B 75 81627B 79 81628B 82 Calculation Sheet for Linearity Measurement (81622B/26B) 86 Calculation Sheet for Linearity
Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition
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