BS EN 61280-4-4-2006 Fibre optic communication subsystem basic test procedures - Cable plants and links - Polarization mode dispersion measurement for installed links《光纤通信子系统基本试验程序.pdf

1、BRITISH STANDARDBS EN61280-4-4:2006Fibre optic communication subsystem test procedures Part 4-4: Cable plants and links Polarization mode dispersion measurement for installed linksThe European Standard EN 61280-4-4:2006 has the status of a British StandardICS 33.180.01g49g50g3g38g50g51g60g44g49g42g3

2、g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSIBS EN 61280-4-4:2006This British Standard was

3、published under the authority of the Standards Policy and Strategy Committee on 31 May 2006 BSI 2006ISBN 0 580 48382 7National forewordThis British Standard is the official English language version of EN 61280-4-4:2006. It is identical with IEC 61280-4-4:2006.The UK participation in its preparation

4、was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/3, Fibre optic systems and active devices, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards whi

5、ch implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publicat

6、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/

7、European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, page

8、s 2 to 67 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 61280-4-4 NORM

9、E EUROPENNE EUROPISCHE NORM April 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation

10、 in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61280-4-4:2006 E ICS 33.180.01 English version Fibre optic communication subsystem test procedures Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links (IEC 61280-4-4:2006) Pr

11、ocdures dessai des sous-systmes de tlcommunication fibres optiques Partie 4-4: Installation de cbles et liens - Mesure de la dispersion de mode polarisation pour les liaisons installes (CEI 61280-4-4:2006) Prfverfahren fr Lichtwellenleiter-Kommunikationsuntersysteme Teil 4-4: Kabelnetze und bertragu

12、ngsstrecken - Messung der Polarisationsmodendispersion von installierten bertragungsstrecken (IEC 61280-4-4:2006) This European Standard was approved by CENELEC on 2006-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

13、 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions

14、 (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Aus

15、tria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed C

16、opy: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSIForeword The text of document 86C/683/FDIS, future edition 1 of IEC 61280-4-4, prepared by SC 86C, Fibre optic systems and active devices, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was app

17、roved by CENELEC as EN 61280-4-4 on 2006-02-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-12-01 latest date by which the national standards conflicting with the EN

18、have to be withdrawn (dow) 2009-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61280-4-4:2006 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be

19、added for the standards indicated: IEC 60793-1-48 NOTE Harmonized as EN 60793-1-48:2003 (not modified). IEC 61290-11-1 NOTE Harmonized as EN 61290-11-1:2003 (not modified). IEC 61290-11-2 NOTE Harmonized as EN 61290-11-2:2005 (not modified). _ 2 EN 61280-4-4:2006Licensed Copy: Wang Bin, na, Tue Aug

20、08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSICONTENTS 3 EN 61280-4-4:20061 Scope 5 2 Normative references .6 3 Symbols and abbreviated terms 6 4 Background on PMD properties.7 5 Measurement methods .8 5.1 Methods of measuring PMD .8 5.2 Reference test method.12 6 Apparatus.12 6.1 Light source and

21、 polarizers12 6.2 Input optics .13 6.3 Cladding mode stripper13 6.4 High-order mode filter13 6.5 Output positioner .13 6.6 Output optics.13 6.7 Detector 14 6.8 Computer 14 6.9 Means to reduce the effects of amplified spontaneous emission .14 7 Sampling and specimens 14 8 Procedure 14 9 Calculation o

22、r interpretation of results.14 10 Documentation .15 10.1 Information required for each measurement .15 10.2 Information to be available.15 11 Specification information.15 Annex A (normative) Fixed analyzer method.16 Annex B (normative) Stokes parameter evaluation method .23 Annex C (normative) Inter

23、ferometric method.30 Annex D (normative) Stokes parameter evaluation method using back-reflected light 40 Annex E (normative) Modulation phase-shift method.42 Annex F (normative) Polarization phase shift method53 Annex G (informative) PMD determination by Method C61 Annex ZA (normative) Normative re

24、ferences to international publications with their corresponding European publications67 Bibliography .65 Figure A1 Block diagrams for fixed analyzer .16 Figure A2 Example of the R-function for the fixed analyzer method .18 Figure A3 PMD by Fourier analysis 21 Licensed Copy: Wang Bin, na, Tue Aug 08

25、03:11:22 BST 2006, Uncontrolled Copy, (c) BSI 4 EN 61280-4-4:2006Figure B1 Block diagram for Method B using a narrowband (tuneable laser) source.23Figure B2 Block diagram for Method B using a broadband (ASE) source .23 Figure C1 Generic set-up for Method C (INTY) .30 Figure C2 Schematic diagram for

26、Method C (TINTY).31 Figure C3 Typical data obtained by Method C (TINTY)33 Figure C4 Schematic diagram for Method C (GINTY) 34 Figure C5 Typical random-mode-coupling data obtained by Method C (GINTY) .37 Figure C6 Typical mixed-mode-coupling data obtained by Method C (GINTY)38 Figure D1 Layout for Me

27、thod D.40 Figure E1 Basic apparatus .42 Figure E2 Apparatus layout for polarization modulation.46 Figure E3 Mueller states on Poincar sphere49 Figure E4 DGD versus wavelength .50 Figure E5 DGD in histogram format51 Figure F1 Block diagram for Method F (polarization phase shift method) .53 Figure F2

28、DGD versus wavelength for a random mode coupling device .57 Table E1 Example of Mueller set 49 Licensed Copy: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSIFIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES Part 4-4: Cable plants and links Polarization mode dispersion measur

29、ement for installed links 1 Scope This part of IEC 61280 provides uniform methods of measuring polarization mode dispersion (PMD) of single-mode installed links. An installed link is the optical path between transmitter and receiver, or a portion of that optical path. These measurements may be used

30、to assess the suitability of a given link for high bit rate applications or to provide insight on the relationships of various related transmission attributes. The principles of this document are aligned with those of the optical fibre and optical fibre cable test method, IEC 60793-1-48 (see Bibliog

31、raphy), which focuses on aspects related to the measurement of factory lengths. Instead, this document focuses on the measurement methods and requirements for measuring long lengths that might be installed and that might also include other optical elements, such as amplifiers, DWDM components, multi

32、plexers, etc. PMD is a statistical parameter. The reproducibility of measurements depends on the particular method, but is limited also by the PMD level of the link. Gisin 35)derived a theoretical limit to this reproducibility, by assuming an infinite range of measured wavelengths and ideal measurem

33、ent conditions. NOTE 1 Test methods for factory lengths of optical fibres and optical fibre cables are given in IEC 60793-1-48. NOTE 2 Test methods for optical amplifiers are given in IEC 61290-11-1 and IEC 61290-11-2. NOTE 3 Test methods for passive optical components are given in IEC 61300-3-32. N

34、OTE 4 Guidelines for the calculation of PMD for links that include components such as dispersion compensators or optical amplifiers are given in IEC 61282-3. With the exception of Method D, all methods in this document may be used to measure the PMD in the gain band of links that include pumped opti

35、cal amplifiers. For these links, amplified spontaneous emission (ASE) noise can generate depolarized spectral energy in the neighbourhood of the measurement wavelength. This will, in general, reduce the accuracy of the measurement. For Methods A, B, C, E and F, this effect can be moderated by implem

36、enting an optical or electrical filter at the receive end. However, optical filtering will not remove the ASE right under the signal spectrum. The accuracy will then be limited by a lower degree of polarization (DOP), if the spectral width of the filter cannot be sufficiently reduced as with a broad

37、band source. Lower DOP may require the signal to be integrated longer to be meaningful or the result will become too noisy and interpretation will be erroneous. None of the methods is suitable for measuring the PMD of links with polarization dependent loss (PDL) in excess of 10 dB. Links with PDL va

38、lues less than 1 dB can be measured with reasonable accuracy. Measurement accuracy may be compromised by the presence of PDL in excess of 1 dB. _ 5)Figures in square brackets refer to the bibliography. 5 EN 61280-4-4:2006Licensed Copy: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (

39、c) BSI2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-1-44: Opti

40、cal fibres Part 1-44: Measurement methods and test procedures Cut-off wavelength 3 Symbols and abbreviated terms c Velocity of light in vacuum (299792458 m/s) h Coupling length L Length of the link ct Optical source coherence time (Method C) Wavelength increment (step size) Optical frequency increme

41、nt (step size) Optical source spectral width or linewidth (FWHM unless noted otherwise) Rotation angle on Poincar sphere Differential arrival times of different polarization components. minMinimum value that can be measured Differential group delay value Average DGD over a wavelength range or PMDave

42、ragevalue 1/2RMS DGD over a wavelength range or PMDRMSvalue maxMaximum value that can be measured Angular frequency variation in Method B Test wavelength used to measure PMD 0Central wavelength of the light source v Optical light frequency RSecond moment of Fourier transform data 0RMS width of the s

43、quared autocorrelation envelope xRMS width of the squared cross-correlation envelope RMS width of interferogram Angular optical frequencyASE Amplified spontaneous emission DGD Differential group delay DOP Degree of polarization DUT Device under test FA Fixed analyzer 6 EN 61280-4-4:2006Licensed Copy

44、: Wang Bin, na, Tue Aug 08 03:11:22 BST 2006, Uncontrolled Copy, (c) BSIFET Field effect transistor FWHM Full-width half-maximum GINTY General interferometric analysis I/O Input-output JME Jones matrix eigenanalysis LED Light emitting diode MPS Modulation phase shift PDL Polarization dependent loss

45、PIN (diode) Positive insulated negative PMD Polarization mode dispersion PPS Polarization phase shift PSA Poincar sphere analysis PSP Principal SOP RBW Resolution bandwidth RMS Root mean-square SOP State of polarization SPE Stokes parameter evaluation TINTY Traditional interferometric analysis 4 Bac

46、kground on PMD properties PMD causes an optical pulse to spread in the time domain. This dispersion could impair the performance of a telecommunications system. The effect can be related to differential phase and group velocities and corresponding arrival times, , of different polarization component

47、s of the signal. For a sufficiently narrowband source, the effect can be related to a differential group delay (DGD), , between pairs of orthogonally polarized principal states of polarization (PSP) at a given wavelength. For broadband transmission, the delays bifurcate and result in an output pulse

48、 that is spread out in the time domain. In this case, the spreading can be related to the root-mean square (RMS) of DGD values. In long fibre spans, DGD varies randomly both in time and wavelength since it depends on the details of the birefringence along the entire fibre length. It is also sensitiv

49、e to time-dependent temperature and mechanical perturbations on the fibre. For this reason, a useful way to characterize PMD in long fibres is in terms of the expected value, , or the mean DGD over wavelength. In principle, the expected value does not undergo large changes for a given fibre from day to day or from source to source, unlike the parameters or . In addition, is a useful predictor of transmission performanc