IEC 61280-4-4-2017 Fibre optic communication subsystem test procedures - Part 4-4 Cable plants and links - Polarization mode dispersion measurement for installe.pdf

1、 IEC 61280-4-4 Edition 2.0 2017-03 INTERNATIONAL STANDARD Fibre optic communication subsystem test procedures Part 4-4: Cable plants and links Polarization mode dispersion measurement for installed links IEC 61280-4-4:2017-03(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 I

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10、and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 61280-4-4 Edition 2.0 2017-03 INTERNATIONAL STANDARD Fibre optic communication subsystem test p

11、rocedures Part 4-4: Cable plants and links Polarization mode dispersion measurement for installed links INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.01 ISBN 978-2-8322-4077-9 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publi

12、cation from an authorized distributor. colour inside 2 IEC 61280-4-4:2017 IEC 2017 CONTENTS FOREWORD . 7 INTRODUCTION . 9 1 Scope 10 2 Normative references 10 3 Terms, definitions, symbols and abbreviated terms 10 3.1 Terms and definitions 10 3.2 Symbols and abbreviated terms 11 4 Background on PMD

13、properties . 12 5 Measurement methods 13 5.1 Methods of measuring PMD 13 5.1.1 General . 13 5.1.2 Method A: Fixed analyzer with Fourier transformation (FA-FT) 14 5.1.3 Method B: Stokes parameters evaluation (SPE) . 14 5.1.4 Method C: Interferometric 15 5.1.5 Method D: Stokes parameter evaluation usi

14、ng back-reflected light . 15 5.1.6 Method E: Modulated phase-shift technique . 15 5.1.7 Method F: Polarization phase shift (PPS) . 15 5.1.8 Method G: Wavelength scanning OTDR and SOP Analysis (WSOSA) 16 5.2 Document structure . 16 5.3 Reference test method 16 6 Measurement configurations 16 6.1 Pass

15、ive cabling link 16 6.2 Link including amplifiers 17 6.3 Link including chromatic dispersion compensating modules 17 6.3.1 General . 17 6.3.2 Grating based DCM . 17 6.4 Link including ROADMs 17 6.4.1 General . 17 6.4.2 Multi-channel point to point configuration . 18 6.4.3 Single channel configuratio

16、n 18 7 Measurement considerations . 18 7.1 General . 18 7.2 Wavelength range . 18 7.3 PMD measurement range 18 7.4 Measurement dynamic range 19 7.5 Fibre movement 19 7.6 Input and output SOP scrambling 19 7.6.1 General . 19 7.6.2 Polarizers/scramblers 19 7.6.3 The 9-states Mueller set 20 7.6.4 Rando

17、m scrambling . 20 7.7 Polarization dependent loss 20 7.8 Amplifier considerations 20 7.8.1 General . 20 7.8.2 Optical isolators . 20 7.8.3 Wavelength range 20 IEC 61280-4-4:2017 IEC 2017 3 7.8.4 Power levels 20 7.8.5 Amplified spontaneous emission (ASE) noise 21 7.9 Considerations on location of equ

18、ipment . 21 8 Apparatus 21 8.1 General . 21 8.2 Light source and polarizers . 21 8.3 Input optics . 22 8.4 Cladding mode stripper . 22 8.5 High-order mode filter . 22 8.6 Output connection . 22 8.7 Output optics 23 8.8 Detector 23 8.9 Computer or test platform . 23 8.10 Means to reduce the effects o

19、f amplified spontaneous emission . 23 9 Sampling and specimens . 23 10 Procedure 23 11 Calculation or interpretation of results . 24 12 Documentation 24 12.1 Information required for each measurement 24 12.2 Information to be available 24 13 Specification information . 25 (normative) Fixed analyzer

20、method 26 Annex A A.1 Apparatus . 26 A.1.1 Block diagrams 26 A.1.2 Light source . 28 A.1.3 Analyzer 29 A.1.4 Optional polarization control at the input and output of the link under test 29 A.2 Procedure . 29 A.2.1 Wavelength range and increment . 29 A.2.2 Complete the scans . 30 A.3 Calculations Fou

21、rier transform . 31 A.3.1 General . 31 A.3.2 Data pre-processing and Fourier transformation 32 A.3.3 Transform data fitting. 32 A.3.4 Spectral range . 34 (normative) Stokes parameter evaluation method 36 Annex B B.1 Apparatus . 36 B.1.1 Block diagrams 36 B.1.2 Light source . 37 B.1.3 Polarimeter 37

22、B.2 Procedure . 37 B.3 Calculations 38 B.3.1 General . 38 B.3.2 Jones matrix eigenanalysis (JME) 38 B.3.3 Poincar sphere analysis (PSA) DGD calculation 40 (normative) Interferometric method 41 Annex C C.1 General . 41 4 IEC 61280-4-4:2017 IEC 2017 C.2 Traditional analysis (TINTY) 42 C.2.1 Apparatus

23、42 C.2.2 Procedure 43 C.2.3 Calculations . 44 C.3 General analysis (GINTY) . 45 C.3.1 Benefit . 45 C.3.2 Apparatus 45 C.3.3 Procedure 46 C.3.4 Calculations . 47 (informative) Stokes parameter evaluation method using back-reflected light. 49 Annex D D.1 Utility 49 D.2 Apparatus . 49 D.2.1 Block diagr

24、am 49 D.2.2 Directional coupler . 49 D.2.3 Angled connector . 49 D.2.4 Far-end termination . 49 D.3 Procedure . 50 D.4 Calculation and interpretation of results 50 (informative) Modulation phase-shift method 51 Annex E E.1 Apparatus . 51 E.1.1 Overview and block diagrams 51 E.1.2 Light source(s). 52

25、 E.1.3 Modulation . 53 E.1.4 Polarization control 54 E.1.5 Input and output optics 54 E.1.6 Optical detector and phase detection electronics . 55 E.1.7 Reference signal 55 E.2 Procedure . 55 E.2.1 Modulation frequency 55 E.2.2 Scan the wavelengths and measure DGD 55 E.2.3 Calibration . 58 E.3 Calcul

26、ations 58 E.3.1 DGD calculations . 58 E.3.2 PMD calculation . 59 (informative) Polarization phase shift method . 60 Annex F F.1 Apparatus . 60 F.1.1 Block diagram 60 F.1.2 Light source . 60 F.1.3 Modulation . 60 F.1.4 Polarization control 61 F.1.5 Output optics . 61 F.1.6 Optical detectors . 61 F.1.

27、7 Amplitude and phase comparator . 61 F.1.8 Reference signal 62 F.2 Procedure . 62 F.2.1 Modulation frequency 62 F.2.2 Wavelength increment . 62 F.2.3 Scanning wavelengths and measuring DGDs . 62 F.2.4 Calibration . 63 IEC 61280-4-4:2017 IEC 2017 5 F.3 Calculations 63 F.3.1 Results overview . 63 F.3

28、.2 DGD determination 64 F.3.3 PMD calculation . 65 (normative) Wavelength scanning OTDR and SOP analysis (WSOSA) PMD Annex G test method . 66 G.1 General . 66 G.2 Apparatus . 66 G.2.1 Block diagram 66 G.2.2 Light source . 67 G.2.3 Launch polarization . 67 G.2.4 Polarization scrambling 68 G.2.5 Input

29、/output optics . 68 G.3 Specimen stability . 68 G.4 Procedure . 68 G.4.1 Set instrument parameters . 68 G.4.2 Action of the instrument after measurement initiation . 69 G.5 Calculations 71 G.5.1 Power normalisation 71 G.5.2 Transmission differences . 72 G.5.3 Mean-square transmission difference and

30、round trip PMD . 73 G.5.4 Determination of PMD 74 G.6 Procedures for measuring PMD on installed aerial links 74 G.6.1 Instability compensation 74 G.6.2 Approaches to reducing the effects of instabilities . 75 (informative) PMD determination by Method C . 77 Annex H H.1 General . 77 H.2 Traditional a

31、nalysis . 77 H.3 General analysis . 79 Bibliography 81 Figure 1 Typical passive cabling link configuration . 16 Figure 2 Example configuration of link including amplifiers . 17 Figure A.1 Block diagrams for fixed analyzer . 28 Figure A.2 Example of the R-function for the fixed analyzer method . 31 F

32、igure A.3 A chirped sine wave 33 Figure A.4 PMD by Fourier analysis . 34 Figure B.1 Block diagram for Method B using a narrowband (tuneable laser) source 36 Figure B.2 Block diagram for Method B using a broadband (ASE) source . 36 Figure C.1 Generic set-up for Method C (INTY) 41 Figure C.2 Schematic

33、 diagram for Method C (TINTY) . 42 Figure C.3 Typical data obtained by Method C (TINTY) 44 Figure C.4 Schematic diagram for Method C (GINTY) 45 Figure C.5 Typical random-mode-coupling data obtained by Method C (GINTY) 47 Figure C.6 Typical mixed-mode-coupling data obtained by Method C (GINTY) . 47 F

34、igure D.1 Layout for Method D . 49 Figure E.1 Basic apparatus 51 6 IEC 61280-4-4:2017 IEC 2017 Figure E.2 Apparatus layout for polarization modulation . 52 Figure E.3 Mueller states on Poincar sphere 57 Figure E.4 DGD versus wavelength 58 Figure E.5 DGD in histogram format 58 Figure F.1 Block diagra

35、m for Method F (polarization phase shift method) . 60 Figure F.2 DGD versus wavelength for a random mode coupling device 64 Figure G.1 Illustration of the frequency domain and parameters for WSOSA 66 Figure G.2 Typical generic experimental implementation for WSOSA . 67 Figure G.3 Typical power measu

36、rement results 71 Figure G.4 Typical s ( ) for random I/O-SOP 72 Figure G.5 Typical transmission difference for a frequency pair and I/O -SOP 73 Figure G.6 Example of 2 -pulse implementation in presence of instabilities . 76 Table E.1 Example of Mueller set . 57 IEC 61280-4-4:2017 IEC 2017 7 INTERNA

37、TIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES Part 4-4: Cable plants and links Polarization mode dispersion measurement for installed links FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization compr

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47、rmative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held res

48、ponsible for identifying any or all such patent rights. International Standard IEC 61280-4-4 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86: Fibre optics. This second edition cancels and replaces the first edition published in 2006. This

49、second edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) theory is removed and replaced with a reference to IEC TR 61282-9; b) a new method, wavelength scanning OTDR and SOP analysis (WSOSA), is added as Annex G; c) a brief description of each method is added to Clause 5; d) Methods E and F are converted to informative Annexes E and F; 8 IEC 61280-4-4:2017