BS EN 60793-1-45-2003 Optical fibres - Part 1-45 Measurement methods and test procedures - Mode field diameter《光纤 测量方法和试验规程 模场直径》.pdf

1、Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSIBRITISH STANDARD BS EN 60793-1-45: 2003 Optical fibres Part 1-45: Measurement methods and test procedures Mode field diameter The European Standard EN 60793-1-45:2003 has the status of a

2、 British Standard ICS 33.180.10 Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSIBS EN 60793-1-45:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 April 2004 BSI 26 April

3、 2004 ISBN 0 580 43351 X National foreword This British Standard is the official English language version of EN 60793-1-45:2003. It was derived by CENELEC from IEC 60793-1-45:2001. It partly supersedes BS EN 188000:1994 which will be withdrawn on publication of the full BS EN 60793-1 series. The CEN

4、ELEC common modifications have been implemented at the appropriate places in the text and are indicated by common modification tags . The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables, which has the

5、responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section enti

6、tled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Complianc

7、e with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related int

8、ernational and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 30, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document

9、was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 60793-1-45 NORME EUROPENNE EUROPISCHE NORM December 2003 CENELEC European Committee for E

10、lectrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. R

11、ef. No. EN 60793-1-45:2003 E ICS 33.180.10 Partly supersedes EN 188000:1992 Incorporates Corrigendum April 2004English version Optical fibres Part 1-45: Measurement methods and test procedures Mode field diameter (IEC 60793-1-45:2001 + corrigendum 2002, modified) Fibres optiques Partie 1-45: Mthodes

12、 de mesure et procdures dessai Diamtre du champ de mode (CEI 60793-1-45:2001 + corrigendum 2002, modifie) Lichtwellenleiter Teil 1-45: Messmethoden und Prfverfahren Modenfelddurchmesser (IEC 60793-1-45:2001 + Corrigendum 2002, modifiziert) This European Standard was approved by CENELEC on 2003-11-01

13、. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtaine

14、d on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (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

15、 Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slova

16、kia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSIForeword The text of document 86A/674/FDIS, future edition 1 of IEC 60793-1-45, prepared by SC 86A, Fibres and cables, of IEC TC 86, F

17、ibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60793-1-45 on 2001-10-01. A draft amendment, prepared by the Technical Committee CENELEC CENELEC TC 86A, Optical fibres and optical fibre cables, was submitted to the Unique Acceptance Procedure and was app

18、roved by CENELEC for inclusion into EN 60793-1-45 on 2003-11-01. This European Standard supersedes subclause 4.24 (test method 314) and subclause 4.25 (test method 315) of EN 188000:1992. The following dates were fixed: latest date by which the EN has to be implemented at national level by publicati

19、on of an identical national standard or by endorsement (dop) 2004-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-11-01 Annexes designated “normative“ are part of the body of the standard. In this standard, Annexes A, B, C, D and ZA are norma

20、tive and annex E is informative. Annex ZA has been added by CENELEC. Compared to IEC 60793-1:1989 and IEC 60793-2:1992, IEC/SC 86A has adopted a revised structure of the new IEC 60793 series: The individual measurement methods and test procedures for optical fibres are published as “Part 1-XX“; the

21、product standards are published as “Part 2-XX“. The general relationship between the new series of EN 60793 and the superseded European Standards of the EN 188000 series is as follows: EN Title supersedes EN 60793-1-XX Optical fibres - Part 1-XX: Measurement methods and test procedures Individual su

22、bclauses of EN 188000:1992 EN 60793-2-XX Optical fibres - Part 2-XX: Product specifications EN 188100:1995 EN 188101:1995 EN 188102:1995 EN 188200:1995 EN 188201:1995 EN 188202:1995 EN 60793-1-4X consists of the following parts, under the general title: Optical fibres: - Part 1-40: Measurement metho

23、ds and test procedures Attenuation - Part 1-41: Measurement methods and test procedures Bandwidth - Part 1-42: Measurement methods and test procedures Chromatic dispersion - Part 1-43: Measurement methods and test procedures Numerical aperture - Part 1-44: Measurement methods and test procedures Cut

24、-off wavelength - Part 1-45: Measurement methods and test procedures Mode field diameter - Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance - Part 1-47: Measurement methods and test procedures Macrobending loss - Part 1-48: Measurement methods and tes

25、t procedures Polarization mode dispersion - Part 1-49: Measurement methods and test procedures Differential mode delay The contents of the corrigendum of April 2004 have been included in this copy. _ - - 3 6 NE970-3-1:540023 Endorsement notice The text of the International Standard IEC 60793-1-45:20

26、01 was approved by CENELEC as a European Standard with agreed common modifications. DOM NOMMOCITACIFINOS nAnex D calpeRe ht3 e drraparghpa by: Teh msaeruemc tnetie nahre rep ebfromne eht ta de-dfcafo e f ehtirbro e c tieb na lppaeim ot dsaerue FM ehtv Draitaoiola nht gnnel efo htg f ehtirbO .eTRD -n

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30、ecnerwet neeh cabrettacskop def rewrom fer ehteop ecnerint t otp ehotni rednu setsa ,t seeb ny htt ewne o-dfcase fo f ehtirbA ,e dna .B eRebmunr teh rogianil .D.3D ot 3.4.3: Page2 EN60793145:2003Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy

31、, (c) BSI CONTENTS INTRODUCTION.5 1 Scope6 2 Normative references .7 3 Reference test method .7 4 Apparatus7 4.1 Light source.7 4.2 Input optics7 4.3 Input positioner8 4.4 Cladding mode stripper8 4.5 High-order mode filter8 4.6 Output positioner .8 4.7 Output optics .8 4.8 Detector8 4.9 Computer8 5

32、Sampling and specimens8 5.1 Specimen length8 5.2 Specimen end face9 6 Procedure9 7 Calculations .9 7.1 Method A Direct far-field scan.9 7.2 Method B Variable aperture in the far field.10 7.3 Method C Near-field scan .11 8 Results11 8.1 Information to be provided with each measurement11 8.2 Informati

33、on available upon request 11 9 Specification information 12 Annex A (normative) Requirements specific to method A Mode field diameter by direct far-field scan .13 Annex B (normative) Requirements specific to method B Mode field diameter by variable aperture in the far field16 Annex C (normative) Req

34、uirements specific to method C Mode field diameter by near-field scan 19 Annex D (normative) Requirements specific to method D Mode field diameter by optical time domain reflectometer (OTDR).23 Annex E (informative) Sample data sets and calculated values .28 Annex ZA (normative) Normative references

35、 to international publications with their corresponding European publications.30 Page3 EN60793145:2003Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSI Figure 1 Transform relationships between measurement results .6 Figure A.1 Far-fiel

36、d measurement set.13 Figure B.1 Variable aperture by far-field measurement set16 Figure C.1 Near-field measurement set-ups20 Figure D.1 Optical switch arrangement .24 Figure D.2 View from reference fibre A.25 Figure D.3 View from reference fibre B.25 Figure D.4 Validation example Comparison of metho

37、ds27 Table E.1 Sample data, method A MFD by direct far-field scan 28 Table E.2 Sample data set, method B MFD by variable aperture in the far field 29 Table E.3 Sample data set, method C MFD by near-field scan .29 Page4 EN60793145:2003Licensed Copy: Wang Bin, ISO/Exchange China Standards Information

38、Centre, 14 July 2004, Uncontrolled Copy, (c) BSI INTRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test procedures as they apply to optical fibres. Within the same series several different areas are grouped, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29

39、: Measurement methods and test procedures for dimensions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical charac- teristics parts 1-40 to 1-49: Measurement methods and test procedures for transmission and optical characteristics parts 1-50 to 1-59: Measurement methods and t

40、est procedures for environmental charac- teristics. Page5 EN60793145:2003Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSI OPTICAL FIBRES Part 1-45: Measurement methods and test procedures Mode field diameter 1 Scope This part of IEC 6

41、0793 establishes uniform requirements for measuring the mode field diameter (MFD) of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. The MFD represents a measure of the transverse extent of the electromagnetic field intensity of the mode in a fibre cr

42、oss section, and it is defined from the far-field intensity distribution as a ratio of integrals known as the Petermann II definition. See equation (1). The definitions of MFD are strictly related to the measurement configurations. The mathematical equivalence of these definitions results from trans

43、form relationships between measurement results obtained by different implementations summarized in figure 1 as follows: Far-field scan Variable aperture technique Hankel transform Integration Near field scanFigure 1 Transform relationships between measurement results Four methods are described for m

44、easuring MFD: method A: direct far-field scan; method B: variable aperture in the far field; method C: near-field scan; method D: bi-directional backscatter using an optical time domain reflectometer (OTDR). All four methods apply to all categories of type B single-mode fibre shown in IEC 60793-2 an

45、d operating near 1 310 nm or 1 550 nm. Method D is not recommended for the measurement of fibres of unknown type or design. Information common to all four methods is contained in clauses 1 to 8, and information pertaining to each individual method appears in annexes A, B, C and D, respectively. IEC

46、706/01 Page6 EN60793145:2003Licensed Copy: Wang Bin, ISO/Exchange China Standards Information Centre, 14 July 2004, Uncontrolled Copy, (c) BSI 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC

47、60793. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60793 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below

48、. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-2:1998, Optical fi

49、bres Part 2: Product specifications 3 Reference test method Method A, direct far-field scan, is the reference test method (RTM), which shall be the one used to settle disputes. 4 Apparatus The following apparatus is common to all measurement methods. Annexes A, B, C and D include layout drawings and other equipment requirements for ea