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Agilent Technologies 81618A User Manual Download Page 12

What is an Optical Head?

Getting Started with Optical Heads

Agilent  81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition

11

What is an Optical Head?

An optical head measures the power emitted from a connected single-

mode 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.

Figure 1

Rear view of an Optical Head with Analog Output

Figure 2

Front View of Optical Head without Adapter

Figure 1 and Figure 2 show views of a typical optical head. Figure 3 

shows two types of adapter that are available for connecting the input 

fiber to an optical head.

Figure 3

Connector adapters

Cable to

interface module

Analog output

screw to lock the
connector adapter
when fitted

Optical interface

connector adapter locking screws

Threaded connector adapter

D-type magnetic connecter adapter

(preferred)

Summary of Contents for 81618A

Page 1: ... underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective ...

Page 2: ...S1 Agilent 81618A 9A Optical Head Interface Modules and Agilent 81622B 3B 4B 6B 7B 8B Optical Heads User s Guide ...

Page 3: ...pay all shipping charges duties and taxes for products returned to Agilent from another country Agilent warrants that 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 Lim...

Page 4: ...ment in safe condition WARNING The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met Safety Symbols The apparatus will be marked with this symbol when it is necessary for the user to...

Page 5: ...pping damage to any portion of the outer enclosure covers panels etc Line Power Requirements The Agilent 81618A and Agilent 81619A Optical Head Interface Modules operate when installed in the Agilent 8163A Lightwave Multimeter Agilent 8164A Lightwave Measurement System and Agilent 8166A Lightwave Multichannel System Operating Environment The safety information in the Agilent 8163A Lightwave Multim...

Page 6: ...t Sink for 81628B optical Head 12 Attaching the heat sink to the 81628B Optical Head 13 Applicable adapters 13 Mounting Instructions 13 Accessories 15 Modules and Options 17 Optical Heads 81622B 23B 24B 26B 28B 5 3 mm Sensors 17 Optical Head 81627B 3 mm Sensor 18 Connector Adapters Reference List 19 Specifications 21 Definition of Terms 23 Averaging Time 23 Linearity 23 Linewidth 24 Noise 24 Power...

Page 7: ...ation 39 Functional Tests 40 Performance Tests 41 For 81628B only 41 Accuracy Test 43 Linearity Test 45 Calculation 51 Noise Test 54 Return Loss Test 55 Relative Uncertainty due to Polarization Optional Test 57 Relative Uncertainty due to Interference Optional Test 59 Calculation Sheets 85 Cleaning Information 87 Cleaning Instructions for this Device 89 81000xA Optical Head Adapters 89 8162xx Opti...

Page 8: ...ean connectors 97 How to clean connector adapters 98 How to clean connector interfaces 99 How to clean bare fiber adapters 99 How to clean lenses 100 How to clean instruments with a fixed connector interface 101 How to clean instruments with an optical glass plate 101 How to clean instruments with a physical contact interface 101 How to clean instruments with a recessed lens interface 102 How to c...

Page 9: ...Table of Contents 8 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 10: ...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 ...

Page 11: ...tting Started with Optical Heads 10 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition This chapter introduces the features of the Agilent 81622B 3B 4B 6B 7B 8B Optical Heads ...

Page 12: ...wer range depends on the sensor element Figure 1 Rear view of an Optical Head with Analog Output Figure 2 Front View of Optical Head without Adapter Figure 1 and Figure 2 show views of a typical optical head Figure 3 shows two types of adapter that are available for connecting the input fiber to an optical head Figure 3 Connector adapters Cable to interface module Analog output screw to lock the c...

Page 13: ...ontrolling the current supplied to a laser to aid positioning the system for fiber alignment tasks to monitor optical power on an oscilloscope The analog signal reacts instantaneously to the input signal whereas the power shown on the display is subject to averaging Optical input The optical input to the optical head requires a connector adapter to match the connector type or bare fiber to the opt...

Page 14: ...fibers are not intended to be used in high power applications NOTE If shipping the 81628B high power optical head please detach the heatsink from the optical head to avoid damages during transportation Mounting Instructions 1 Check that the blue rubber ring is correctly attached to the integrating sphere and covers the metallic screws as shown in Figure 4 Figure 4 Attaching the Rubber Ring 2 The h...

Page 15: ...e 5 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 Figure 6 Attaching the Upper Part of the Heat Sink ...

Page 16: ...Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition 15 Accessories ...

Page 17: ...nd Edition 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 ...

Page 18: ...7dBm to 70 dBm 81628B In GaAs 40dBm to 60 dBm use only with threaded Connector Adapters D Shaped Adapter 81624DD 1ea supplied with head Connector Interfaces 81000AI Diamond HMS 10 81000FI FC PC SPC 81000GI D4 81000HI E2000 81000KI SC PC SPC 81000SI DIN 47256 81000VI ST 81002LI LC Accessories 81624CE 4m extension cable 81624DD additional D shape quick change adapter 81624RM Half rack Mount Kit for ...

Page 19: ...ters with intergral D Shape 81001BA Bare Fiber 125µm 81001FA FC PC SPC APC 81001KA SC PC APC 81001LA LC 81001MA MU 81001PA E 2000 APC 81001SA DIN 47256 4108 6 81001ZA BLANK Adapter NA 0 11 Single mode fiber NA 0 22 Multi mode fiber Configuration for connectorized fibers and bare fiber Interface Module Optical Head Connector Adapters with integral D Adapter Accessories 81624CE 4m extension cable 81...

Page 20: ...ntegral D shape for 5 mm optical heads Integral D shape for 3mm and 5mm optical heads HMS10 81000AA Barefiber 81000BA opt 002 810000BA opt 001 FC PC 81000FA 810001FA NEC D4 81000GA SC PC 81000KA 810001KA MU 81000MA 810001MA MT RJ 81003JD E 2000 81000PA 810001PA DIN 81000SA 810001SA ST 81000VA blank 81000ZA 810001ZA LC 810003LA 810001LA MPX ribbon 81003PD MTP ribbon 81003TD Table 1 Connector Adapte...

Page 21: ...Accessories Modules and Options 20 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 22: ...Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition 21 Specifications ...

Page 23: ...em 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 Because of the modular nature of the instrument these performance specifications apply to...

Page 24: ...memory update Symbol Tavg Linearity The linearity error is defined as the relative difference between the displayed power ratio Dx D0 and the actual true power ratio Px P0 caused by changing the displayed power level from the reference level D0 to an arbitrary displayed level Dx Symbol N if expressed in if expressed in dB Conditions reference level 10 µW displayed power levels within the specified...

Page 25: ...st specified input power level to the smallest input power level that causes a noticeable change of displayed power level Conditions wavelength averaging time as specified Reference conditions The specified conditions during the spectral responsivity calibration or conditions which are extrapolated from the conditions during calibration Conditions power level beam diameter or fiber type numerical ...

Page 26: ...anges of the ambient conditions temperature vibration shock affect particular optical paths which consequently changes the speckle pattern and results in an instability of the head power reading speckle noise NOTE Changes in the source wavelength have a similar effect on speckle noise as environmental changes because they cause fluctuations in the interference pattern If the source coherence lengt...

Page 27: ...iameter or fiber type numerical aperture wavelength spectral width ambient temperature re calibration period as specified Noise and drift observed over a specified observation time with a temperature change of not more than T Uncertainty at reference conditions The uncertainty for the specified set of reference conditions including all uncertainties in the calibration chain from the national labor...

Page 28: ...lel beam max Ø 2 5 mm Uncertainty at Reference Conditions 1 2 2 1000 to 1650 nm 2 2 1000 to 1630 nm 2 5 1000 to 1630 nm Total Uncertainty 2 3 5 100 pW 8 1000 to 1650 nm 3 5 5 pW 1000 to 1630 nm 4 0 5 pW 1000 to 1630 nm Relative Uncertainty 7 due to polarization 3 0 01 dB 11 typ 0 005 dB 0 005 dB typ 0 002 dB 0 005 dB typ 0 002 dB Spectral ripple due to interference 4 0 006 dB typ 0 003 dB 0 005 dB...

Page 29: ...rating temperature range as specified humidity non condensing 3 All states of polarization at constant wavelength 1550 nm 30 nm and constant power straight connector T 23 C 5 For angled connector 8 add 0 01 dB typ 4 Conditions Wavelength 1550 nm 30 nm fixed state of polarization constant power Temperature 23 C 5 C Linewidth of source 100 MHz angled connector 8 5 At constant temperature T 1 C zeroi...

Page 30: ...0 950 to 1630 nm 3 0 950 to 1630 nm Total Uncertainty 2 5 40 nW 10 950 to 1630 nm 5 0 500 pW 10 950 to 1630 nm Relative Uncertainty 7 due to polarization 3 0 01 dB typ 0 005 dB 0 005 dB typ 0 002 dB Spectral ripple due to interference 4 0 006 dB typ 0 003 dB 0 005 dB typ 0 002 dB Linearity power 5 CW 27 to 40 dBm 950 1630 nm CW 27 to 50 dBm 950 1630 nm at 23 C 5 C 0 05 dB 40 nW 10 0 04 dB 500 pW 1...

Page 31: ...ar after calibration add 0 3 for second year Operating temperature range as specified humidity non condensing 3 All states of polarization at constant wavelength 1550 nm 30 nm and constant power straight connector T 23 C 5 For angled connector 8 add 0 01 dB typ 4 Conditions Wavelength 1550 nm 30 nm fixed state of polarization constant power Temperature 23 C 5 C Linewidth of source 100 MHz angled c...

Page 32: ...tal Uncertainty 2 8 10 dBm 4 5 nW 10 dBm to 20 dBm 4 5 20 dBm to 38 dBm 5 970 to 1630 nm Relative Uncertainty due to polarization 3 typ 0 006 dB due to speckle noise at source linewidth 4 0 1 pm to 100 pm typ 0 02 dB 100 pm typ 0 002 dB Linearity power 5 8 CW 38 to 40 dBm 970 1630 nm at 23 C 5 C 10 dBm 0 03 dB 5 nW 10 dBm to 30 dBm 0 05 dB 30 dBm to 37 dBm 0 09 dB 37 dBm to 38dBm 0 1 dB at operati...

Page 33: ...constant wavelength 1550 nm 30 nm and constant power 4 Conditions Wavelength 1550 nm 30 nm fixed state of polarization constant power Temperature 23 C 5 C Measurement time 3 min 5 At constant temperature T 1 C zeroing required 6 Averaging time 1s T 23 C 5 C observation time 300 s Wavelength range 970 1630 nm Thermal drift at 38 dBm exposure time 30 min Recovery time 10 min 30 nW 30 min 10 nW 7 For...

Page 34: ...dance 600 Ohm typ Max input voltage 10V Not applicable for 81626B Not applicable for 81622B 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 5 kHz 0 dBm 5 0 kHz 5 0 kHz 1 8 kHz 10 dBm 5 0 kHz 5 0 kHz 1 8 kHz 20 dBm 5 0 kHz 5 0 kHz 0 12 kHz 30 dBm...

Page 35: ...Specifications Supplementary Performance Characteristics 34 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 36: ...Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition 35 Performance Tests ...

Page 37: ...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 ...

Page 38: ...al Head 8162x 1 ea 2 ea CW Laser Module Agilent 81657A x x x x x x CW Laser Module Agilent 81654A x x x x x x Agilent 81657A Power Meter Standard Agilent 81618A Optical Head Interface Module with Agilent 81623B C01 x x Power Meter Standard Agilent 81618A Optical Head Interface Module with Agilent 81624B C01 Work x x x x Power Sensor Module Agilent 81634B x x x x x x Optical Attenuator Agilent 8156...

Page 39: ...ithout written permission from Agilent Technologies Singlemode Fiber Agilent 81101AC 2 1 ea x x x x x x Agilent 81101PC 1 ea x Agilent 81102SC 1 ea x Agilent 81113PC 3 ea x x x x x x Agilent 81113SC 1 ea x x x x x x Connector Adapters Agilent 81000AA 2 ea x x x x x Agilent 81000SA 1 ea x x x x x Agilent 81001SA 1 ea x Agilent 81000FA 1 2 ea x x x x x x Agilent 81001FA 1 ea x Connector Interfaces A...

Page 40: ...ecifications on page 21 are the performance standards or limits against which the Agilent 81622B 3B 4B 6B 7B 8B Optical Head can be tested Specifications on page 21 also lists some supplemental characteristics of the Agilent 81622B 3B 4B 6B 7B 8B Optical Head Supplemental characteristics should be considered as additional information Agilent 81618A 19A Interface Modules are tested for functionalit...

Page 41: ... 19A Interface modules 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 Mainframe 8163A B with 8161xA Interface Module as DUT ...

Page 42: ...ept for the linearity test The integrating sphere of the 81628B has to be disconnected for testing the linearity of the head alone A special adapter and a disconnecting tool are necessary for disconnection These tools are included in the Performance Test Kit order P N 81628 68705 If the integrating sphere is disconnected the performance of the 81628B has to be verified If performing a performance ...

Page 43: ...the linearity test within the specifications given on the Test Record Sheet then the whole system sphere and head is within the product specification The head and the integrating sphere of the 81628B are adjusted and serialized together therefore the specifications of the 81628B are only valid for that given combination of head and integrating sphere The disconnecting and connecting of the integra...

Page 44: ...igure 10 Accuracy Test Setup NOTE Make sure that the cables to and from the attenuator are fixed on the table and that both the optical head and the DUT are close together so that minimum cable movement is required when connecting the cable to the head or to the DUT For 81627B only The 81627B does not support 81101AC patchcord Use 81101PC patchcord for measurement path and 81001FA connector adapte...

Page 45: ...r AvgTime press Enter move to 500 ms and press Enter e Move to the power parameter P press Pwr unit move to Watt and press Enter 7 Make sure the optical input of the Device Under Test DUT 8162xA B is not receiving any light by placing a plastic cap over the input Move to the DUT Power Meter channel press Menu move to Zero press Enter 8 Ensure that the Agilent 8156A output is disabled Move to the r...

Page 46: ...etup NOTE Do not turn the laser off during the measurement Clean all connectors carefully before you start with the measurement NOTE The linearity test checks the in range linearity as well as the range discontinuity Therefore two values are measured at the same power but within different power ranges range discontinuity and two different power values one on the lower and the other on the upper li...

Page 47: ...length of both attenuators to the same wavelength as the laser source 5 Perform the following sub procedure for both Power Meters a Move to the Power Meter channel b Move to the wavelength parameter λ press Enter enter the wavelength of the laser source and press Enter c Move to the calibration parameter CAL press Enter set the calibration parameter to zero and press Enter d Move to the averaging ...

Page 48: ... calibration factor of 31 dB This simulates the disconnected integrating sphere If the power at the DUT overflows when switching to the lower range decrease the calibration factor e g to 30 dB and start the linearity test again 10 dBm Range equivalent to 40 dBm range for 81628B 12 Applies to the 81622B and 81626B only Switch to the 20 dBm range and note both power readings as n 0 in the test recor...

Page 49: ...e attenuation of Atty1 in order to be on the upper limit of the range i e x7 y dBm 27 Decrease the attenuation of Atty2 by 10 dB in order to be on the upper limit of the 50 dBm range at the reference power meter 10 dBm Range equivalent to 20 dBm range for 81628B 28 Disable Atty1 29 Zero both Power Meters On the 8163A B with two installed power meters press Menu move to Zero all and press Enter 30 ...

Page 50: ...10 dB and note the results in the test record 11 43 On the DUT switch one range down to the 30 dBm 0 dBm for the 81628B range 44 If necessary adjust the attenuation of Atty1 in order to be on the upper limit of the range i e x7 y dBm 45 Decrease the attenuation of Atty2 by 10 dB in order to be on the upper limit of the 50 dBm range 30 dBm Range equivalent to 0 dBm range for 81628B 46 Disable Atty1...

Page 51: ... range and note the power readings 15 61 Switch one range down 40 dBm 10 dBm for the 81628B and note the power readings again 16 62 Increase the attenuation of Atty1 by 10 dB and note the results in the test record 17 63 On the DUT switch one range down to the 50 dBm range 20 dBm for the 81628B 64 If necessary adjust the attenuation of Atty1 in order to be on the upper limit of the range i e x7 y ...

Page 52: ...angeDisc upper limit 5 16 6 35 5 0 57 2304 7 1141 InRange 6 16 6 25 5 0 47 2363 7 1118 RangeDisc lower limit 7 16 6 25 5 10 47 2347 7 1097 RangeDisc upper limit 8 26 6 25 5 10 57 2345 17 111 InRange 9 26 6 15 5 10 47 2411 17 106 RangeDisc lower limit 10 26 6 15 5 20 47 2382 17 1054 RangeDisc upper limit 11 36 6 15 5 20 57 228 27 0942 InRange 12 36 6 5 5 20 47 2317 27 0864 RangeDisc lower limit 13 ...

Page 53: ... 0 03 4 1 8791E 05 1 929434323 0 1006955 9 9275024 0 04 5 1 89217E 06 0 194352441 6 1 8896E 05 0 194455396 1 0003685 0 9995166 0 08 7 1 8903E 05 0 194549447 0 1000046 10 002994 0 09 8 1 89038E 06 0 019449122 9 1 88751E 05 0 019471526 1 000668 0 9998619 0 05 10 1 88877E 05 0 019474217 Reference Level 0 00 11 1 89322E 06 0 00195245 9 9765412 R n 1 R n 0 1002582 D n D n 1 0 02 12 1 8916E 05 0 0019559...

Page 54: ...s Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition 53 Figure 12 Example of Linearity Test Result 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 Power dBm Nonlinearity ...

Page 55: ...not receiving any light by placing a plastic cap over the input adapter Move to the DUT Power Meter channel press Menu move to Zero and press Enter 3 Press Appl move to Stability and press Enter The Stability Setup Screen appears 4 Ensure that the correct channel is selected in the upcoming Module Selection box 5 Press Menu to access the Logging application menu screen 6 Move to Pwr unit press Ent...

Page 56: ...for measurements on a Device Under Test Instead use a measurement patchcord CAUTION It is important to maintain the quality of the straight connector end of the 81610CC Reference Cable Never add another connector to the straight end of the 81610CC Reference Cable since a physical connection is made When the straight end of the 81610CC Reference Cable is connected to the 81634B Power Sensor module ...

Page 57: ... the setup and connect a 81113SC user cable to the Return Loss Module and leave the other end open as shown in Figure 8 Figure 14 Return Loss Measurement Setup 10 At the Return Loss Module press TermCal in order to calibrate the Return Loss Module at termination condition NOTE Do not wrap the cable The termination condition is realized with the open end of the patchcord 11 Now connect the open end...

Page 58: ...y 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 Generally during this measurement procedure the tunable laser source is swept through a predefined wavelength range After every wavelength step a single PDL measurement is made where the polarization controller generates all the different polarization states ...

Page 59: ...4A B 8164A B 81682A Mainframe 8163A B w 81533B and 81521B Optical Head Ref special 8163A B 81533B GPIB Best IF Adapter 81521B Approved IF free and low PDL optical head special tool 20 dB DIN 4108 angled connector 81113SC Note Polarization Ctrl 11896A 1 99 Mainframe 8163A B w 81618A and 8162xB Optical Head DUT 8163A B 81618A 11896 straight connector 8162xB Optical Head DUT ...

Page 60: ...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 In order to perform the relative uncertainty due to interference test it is mandatory to use two mainframes since the time difference between measurement A und B for a specific wavelength point has to be no greater than ...

Page 61: ... to Interference Measurement Mainframe 8164A B 8164A B 81682A Mainframe 8163A B w 81618A and 8162xB Optical Head DUT 8163A B 81618A GPIB Mainframe 8163A B w 81533B and 81521B Optical Head Ref special 8163A B 81533B 3 dB Best IF Adapter 81521B Approved IF free optical head special tool DIN 4108 angled connector 81113SC Note Worst IF Adapter 8162xB Optical Head DUT ...

Page 62: ...s Guide Second Edition 61 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 Figure 17 Interference Ripple λ max 10mdB A B dB ...

Page 63: ...Performance Tests Performance Tests 62 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 64: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 65: ..._ ___________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81623B ____________ ___________ 6 Sensor Module Agilent 81634B ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Retu...

Page 66: ...n Spec Result Max Spec Measurement Uncertainty I Accuracy Test µW measured at _______ nm 1310nm Output Power 9 64 µW _______ 10 36 µW measured at _______ nm 1550nm Output Power 9 64 µW _______ 10 36 µW II Linearity Test For Calculations you may want to use the appropriate sheet Range PDUT dBm PDUT dBm Loss 20 9 1 53 1 10 9 ________ _______ 1 16 10 3 ________ _______ 1 16 0 3 ________ _______ 1 16 ...

Page 67: ...ower 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 This way it is guaranteed by design that testing the 81622B up to 9 dBm ensures specification compliance up to 27 d...

Page 68: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 69: ..._ ___________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81623A ____________ ___________ 6 Sensor Module Agilent 81634A ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Retu...

Page 70: ... at _______ nm 1550nm Output Power 9 72 µW _______ 10 28 µW II Linearity Test For Calculations you may want to use the appropriate sheet Range PDUT dBm PDUT dBm Loss 10 9 ________ _______ 1 13 10 3 ________ _______ 0 58 0 3 ________ _______ 0 58 0 7 ________ _______ 0 58 10 7 ________ _______ 0 58 10 17 ________ _______ 0 58 20 17 Reference 0 0 0 58 20 27 ________ _______ 0 58 30 27 ________ _____...

Page 71: ...Performance Tests Performance Tests 70 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 72: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 73: ..._ ___________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81624A ____________ ___________ 6 Sensor Module Agilent 81634A ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Retu...

Page 74: ...at _______ nm 1550nm Output Power 9 72 µW _______ 10 28 µW II Linearity Test For Calculations you may want to use the appropriate sheet Range PDUT dBm PDUT dBm Loss 10 9 ________ _______ 0 46 10 3 ________ _______ 0 46 0 3 ________ _______ 0 46 0 7 ________ _______ 0 46 10 7 ________ _______ 0 46 10 17 ________ _______ 0 46 20 17 Reference 0 0 0 46 20 27 ________ _______ 0 46 30 27 ________ ______...

Page 75: ...Performance Tests Performance Tests 74 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 76: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 77: ..._ ___________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81624A ____________ ___________ 6 Sensor Module Agilent 81634A ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Retu...

Page 78: ...t to use the appropriate sheet Range PDUT dBm PDUT dBm Loss 20 9 ________ _______ 1 29 1 10 9 ________ _______ 0 93 10 3 ________ _______ 0 93 0 3 ________ _______ 0 93 0 7 ________ _______ 0 93 10 7 ________ _______ 0 93 10 17 ________ _______ 0 93 20 17 ________ _______ 0 93 20 17 Reference 0 0 0 93 20 27 ________ _______ 0 95 30 27 ________ _______ 0 95 30 37 ________ _______ 1 18 40 37 _______...

Page 79: ...ed 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 Thus it is guaranteed by design that testing the 81626B up to 9 dBm ensures specification compliance to 27 dBm ...

Page 80: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 81: ...________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81624A ____________ ___________ 6 Sensor Module Agilent 81634A ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Return Lo...

Page 82: ...d at _______ nm 1550nm Output Power 9 69 µW _______ 10 31 µW II Linearity Test For Calculations you may want to use the appropriate sheet Range PDUT dBm PDUT dBm Loss 10 9 ________ _______ 0 46 10 3 ________ _______ 0 46 0 3 ________ _______ 0 46 0 7 ________ _______ 0 46 10 7 ________ _______ 0 46 10 17 ________ _______ 0 46 20 17 Reference 0 0 0 46 20 27 ________ _______ 0 46 30 27 ________ ____...

Page 83: ...______________________ Performed by _________________________ Report No _________________________ Special Notes ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ____...

Page 84: ..._ ___________ 4 CW Laser Source Agilent 81654A ____________ ___________ 5a1 Opt Head Interface Module Agilent 81618A ____________ ___________ 5a2 Optical Head Reference Agilent 81624A ____________ ___________ 6 Sensor Module Agilent 81634A ____________ ___________ 7 Optical Attenuator Agilent 8156A 221 ____________ ___________ 8a Optical Attenuator Agilent 8156A 101 ____________ ___________ 9 Retu...

Page 85: ...t Range PDUT dBm PDUT dBm Loss 40 9 ________ _______ 0 46 40 3 ________ _______ 0 46 30 3 ________ _______ 0 46 30 7 ________ _______ 0 46 20 7 ________ _______ 0 46 20 17 ________ _______ 0 46 10 17 Reference 0 0 0 46 10 27 ________ _______ 0 46 0 27 ________ _______ 0 46 0 37 ________ _______ 0 46 10 37 ________ _______ 0 46 10 47 ________ _______ 0 49 20 47 ________ _______ 0 49 20 57 ________ ...

Page 86: ...heet for Linearity Measurement 81623B 81624B 81627B 81628B Your Entries Conversion dBm mW Calculation as given Calculation as given n REF Power dBm DUT Power dBm Ref R DUT D Relation1 A Rn 1 Rn Relation2 B Dn Dn 1 Non Linearity mW mW An Bn NLn 1 1 1 1 R n 1 R n D n R n 1 2 3 4 5 6 7 8 9 10 Reference Level 0 00 11 R n 1 R n D n R n 1 12 13 14 15 16 17 18 19 20 ...

Page 87: ...t for Linearity Measurement 81622B 81626B Your Entries Conversion dBm mW Calculation as given Calculation as given n REF Power dBm DUT Power dBm Ref R DUT D Relation1 A Rn 1 Rn Relation2 B Dn Dn 1 Non Linearity mW mW An Bn NLn 1 1 1 1 R n 1 R n D n R n 1 2 3 4 5 6 7 8 9 10 Reference Level 0 00 11 R n 1 R n D n R n 1 12 13 14 15 16 17 18 19 20 ...

Page 88: ...Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition 87 Cleaning Information ...

Page 89: ...al 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 If you are unsure of the correct cleaning procedure for your optical device we recommend that you first try cleaning a dummy or test device Agilent Technologies assume no liabilit...

Page 90: ...pters on page 98 for cleaning procedures Dust and metal particles can be propelled through the adapter s pinhole while inserting the connector ferrule into the receptacle These dirt particles collect on the head s front window and if not removed can lead to incorrect measurement results 8162xx Optical Power Heads Periodically inspect the optical head s front window for dust and other particles see...

Page 91: ...he device is operational The laser radiation is not visible to the human eye but it can seriously damage your eyesight To prevent electrical shock disconnect the instrument from the mains before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally Do not install parts or perform any unauthorized modification to optical dev...

Page 92: ...ant to suggest ways to help you clean your various optical devices and thus significantly improve the accuracy and repeatability of your lightwave measurements What do I need for proper cleaning Some Standard Cleaning Equipment is necessary for cleaning your instrument For certain cleaning procedures you may also require certain Additional Cleaning Equipment Standard Cleaning Equipment Before you ...

Page 93: ...sible avoid using denatured alcohol containing additives Instead apply alcohol used for medical purposes Never drink this alcohol as it may seriously damage your health Do not use any other solvents as some may damage plastic materials and claddings Acetone for example will dissolve the epoxy used with fiber optic connectors To avoid damage only use isopropyl alcohol Cotton swabs We recommend that...

Page 94: ...ts and come in various shapes and sizes The most suitable one to select for cleaning purposes has soft bristles which will not produces scratches There are many different kinds of pipe cleaner available from tobacco nists The best way to use a pipe cleaner is to push it in and out of the device opening for example when cleaning an interface While you are cleaning you should slowly rotate the pipe ...

Page 95: ...scope with a magnification range about 50X up to 300X A microscope can be found in most photography stores or can be obtained through or specialist mail order companies Special fiber scopes are available from suppliers of splicing equipment Ideally the light source on your microscope should be very flexible This will allow you to examine your device closely and from different angles A microscope h...

Page 96: ...not touch them If you are not sure how sensitive your device is to cleaning please contact the manufacturer or your sales distributor Premoistened cleaning wipes Use pre moistened cleaning wipes as described in each individual cleaning procedure Cleaning wipes may be used in every instance where a moistened soft tissue or cotton swab is applied Polymer film Polymer film is available from laborator...

Page 97: ...ty your fiber surface When you have finished cleaning put the dust cap back on or close the shutter cap if the equipment is not going to be used immediately Always keep the caps on the equipment when it is not in use All of Agilent Technologies lightwave instruments and accessories are shipped with either laser shutter caps or dust caps If you need additional or replacement dust caps contact your ...

Page 98: ... clean connectors Cleaning connectors is difficult as the core diameter of a single mode fiber is only about 9 µm This generally means you cannot see streaks or scratches on the surface To be certain of the condition of the surface of your connector and to check it after cleaning you need a microscope In the case of scratches or of dust that has been burnt onto the surface of the connector you may...

Page 99: ...ore expensive cleaning procedure is to use an ultrasonic bath with isopropyl alcohol 1 Hold the tip of the connector in the bath for at least three minutes 2 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 3 Blow away any remaining lint with compressed air How to clean connector adapters CAUTION Some a...

Page 100: ...aner slowly as you do this 2 Then 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 Procedure for Stubborn Dirt Use this procedure when there is greasy dirt on the interface 1 Moisten a new pipe cleaner with isopropyl alcohol 2 Clean the interface by pushing and pulling the pipe cleaner into the ...

Page 101: ...w away any remaining lint with compressed air 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 t...

Page 102: ...r 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 Never try to open the instrument and clean the optical block by yourself because it is easy to scratch optical components and cause them to become misaligned How to clean instruments with an optical glass plate Som...

Page 103: ...lean the interface by rubbing the cotton swab over the surface using a small circular movement 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 instruments with a recessed lens interface WARNING For instruments with a deeply recessed lens...

Page 104: ...d pressure Some optical devices such as the Agilent 81000BR Reference Reflector which has a gold plated surface are very sensitive to mechanical stress or pressure Do not use cotton swabs soft tissues or other mechanical cleaning tools as these can scratch or destroy the surface Preferred Procedure Use the following procedure on most occasions 1 Blow away any dust or dirt with compressed air Proce...

Page 105: ...t the device will be destroyed by becoming mechanically distorted Preferred Procedure Use the following procedure on most occasions 1 Use compressed air at a distance and with low pressure to remove any dust or lint Procedure for Stubborn Dirt Do not use an ultrasonic bath as this can damage your device Use this procedure when there is greasy dirt on the device 1 Put the optical device into a bath...

Page 106: ...ning lenses with these coatings Lens assemblies consisting of several lenses are not normally sealed Therefore use as little liquid 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 1 Blow away any dust or dirt with compressed air Procedure for Stubborn Dirt Use this procedure when ...

Page 107: ... clean polymer film This 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 B If your lens is sensitive to water then 1 Moisten the lens or the mirror with isopropyl alcohol 2 Ta...

Page 108: ...ike connectors interfaces lenses mirrors and so on To be absolutely certain that a cleaning paper is applicable please ask the salesperson or the manufacturer Immersion oil and other index matching compounds Do not use immersion oil or other index matching compounds with optical sensors equipped with recessed lenses They are liable to dirty the detector and impair its performance They may also alt...

Page 109: ...Cleaning Information Other Cleaning Hints 108 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

Page 110: ... input 12 Optional features 17 P Performance characteristics supplementary 33 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 Measurement 81623B 4B 7B 8B 85 Performance tests 41 Power range 24 R Reference conditions 24 Relative Uncertainty due to Interference 59 Relative Uncertai...

Page 111: ...110 Agilent 81618A 9A and Agilent 81622B 3B 4B 6B 7B 8B User s Guide Second Edition ...

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Page 113: ... Agilent Technologies GmbH 2001 2002 Printed in Germany February 20 2002 81623 90B12 81623 90B12 www agilent com ...

Page 114: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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