《BS-EN-60793-1-45-2003.pdf》由会员分享，可在线阅读，更多相关《BS-EN-60793-1-45-2003.pdf（34页珍藏版）》请在三一文库上搜索。
1、BRITISH 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 British Standard ICS 33.180.10 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00:00 2006,
2、Uncontrolled Copy, (c) BSI BS 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 2004 ISBN 0 580 43351 X National foreword This British Standard is the official English language version of EN 60793-1
3、-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 It partly supersedes BS EN 188000:1994 which will be withdrawn on publication of the full BS EN 60793-1 series.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 CENELEC common modifications have been implemented at the appropriate places in the text and are indicated by common modif
4、ication 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 responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary
5、. 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 entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue
6、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. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the te
7、xt; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front co
8、ver, 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 was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na,
9、Mon Nov 13 02:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60793-1-45 NORME EUROPENNE EUROPISCHE NORM December 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normun
10、g 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. Ref. No. EN 60793-1-45:2003 E ICS 33.180.10 Partly supersedes EN 188000:1992 Incorporates Corrigendum April 2004 English version
11、 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 de mesure et procdures dessai Diamtre du champ de mode (CEI 60793-1-45:2001 + corrigendum 2002, modifie) Lichtwellenleiter Te
12、il 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. 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00:00
16、2006, Uncontrolled Copy, (c) BSI Foreword 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, Fibre 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 amend
17、ment, prepared by the Technical Committee CENELEC CENELEC TC 86A, Optical fibres and optical fibre cables, was submitted to the Unique Acceptance Procedure and was approved by CENELEC for inclusion into EN 60793-1-45 on 2003-11-01. This European Standard supersedes subclause 4.24 (test method 314) a
18、nd 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 publication of an identical national standard or by endorsement (dop) 2004-11-01 latest date by which the national standards conflicting with
19、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 normative 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 ha
20、s 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 product standards are published as “Part 2-XX“. The general relationship between the new series of EN 60793 and the superseded Europe
21、an 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 subclauses of EN 188000:1992 EN 60793-2-XX Optical fibres - Part 2-XX: Product specifications EN 188100:1995 EN 188101:1995 EN 188102:1
22、995 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 methods and test procedures Attenuation - Part 1-41: Measurement methods and test procedures Bandwidth - Part 1-42: Measurement methods an
23、d test procedures Chromatic dispersion - Part 1-43: Measurement methods and test procedures Numerical aperture - Part 1-44: Measurement methods and test procedures Cut-off wavelength - Part 1-45: Measurement methods and test procedures Mode field diameter - Part 1-46: Measurement methods and test pr
24、ocedures Monitoring of changes in optical transmittance - Part 1-47: Measurement methods and test procedures Macrobending loss - Part 1-48: Measurement methods and test procedures Polarization mode dispersion - Part 1-49: Measurement methods and test procedures Differential mode delay The contents o
25、f 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 60793-1-45:2001 was approved by CENELEC as a European Standard with agreed common modifications. DOM NOMMOCITACIFINOS nAnex D calpeRe ht3 edr rapa
26、rghpa 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 -nonilraentiy msut kat ebeca otni ncuotn wehn msaerueht gni FMD raviitaa nolnoht gl egneht fo f ehtirb.e 3.D noitaluclaCs 2.3.D nahCt e
27、gt ehiltsa e flolows: 2.3.D oCpmuttaoin of thps eicenem MFne Dd-fsaem ecaurnemet dAd en aS wcbulsua.D e.3:3 3.D.3 MFe Dvalaua noitleht gno eleht fo htgn rbife Tvoba eh-esedcrebia drppcaoc hb naa etpodt dee ovulaeta raviitasno fo eht FMola Dt gneh nelfo htg f ehtirbratS .etif gnrmo eht -ibridceoitrt
28、lancase naf drom FM ehtulav Dse msaerue eht no de-dnfcase, r ehtepeetappa dcilatoifo n tauqeoi( nD)2. laolws e otsmitlav eht etafo eu M ehtFna ni Dy opfo tni eht samnI .elp htsi csaht ,eret ems uqe niita( noD.)2 will aht evf ehlolowgni msgninae: WS = FMfo D eht optni dnure sett; WA = FMfo D eht niit
29、ila -dnefcae ro fo p ehtniomi tmetaidely rpceidet gneh iopu tnredn tset (sa aveludeta ni daavcnb ey tihs samcet einh)euq, man“ derferecneiop e”tn; LA L,B = iDffeteb 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
30、 eRebmunr teh rogianil .D.3D ot 3.4.3: Page 2 EN 60793145:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS INTRODUCTION.5 1 Scope 6 2 Normative references.7 3 Reference test method .7 4 Apparatus 7 4.1 Light source.7 4.2 Input o
31、ptics7 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 Detector 8 4.9 Computer 8 5 Sampling and specimens8 5.1 Specimen length8 5.2 Specimen end face9 6 Procedure 9 7 Calculations .9 7.1 Method A Direct far-field scan.9 7
32、.2 Method B Variable aperture in the far field.10 7.3 Method C Near-field scan .11 8 Results 11 8.1 Information to be provided with each measurement11 8.2 Information available upon request 11 9 Specification information 12 Annex A (normative) Requirements specific to method A Mode field diameter by
33、 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) Requirements specific to method C Mode field diameter by near-field scan 19 Annex D (normative) Requirements specific to method D Mode fiel
34、d diameter by optical time domain reflectometer (OTDR).23 Annex E (informative) Sample data sets and calculated values .28 Annex ZA (normative) Normative references to international publications with their corresponding European publications.30 Page 3 EN 60793145:2003 Licensed Copy: sheffieldun shef
35、fieldun, na, Mon Nov 13 02:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Figure 1 Transform relationships between measurement results .6 Figure A.1 Far-field measurement set.13 Figure B.1 Variable aperture by far-field measurement set16 Figure C.1 Near-field measurement set-ups20 Figure D.1 Optic
36、al 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 methods27 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
37、field 29 Table E.3 Sample data set, method C MFD by near-field scan .29 Page 4 EN 60793145:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test procedur
38、es 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: Measurement methods and test procedures for dimensions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical charac- terist
39、ics 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 test procedures for environmental charac- teristics. Page 5 EN 60793145:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00
40、:00 2006, Uncontrolled Copy, (c) BSI OPTICAL FIBRES Part 1-45: Measurement methods and test procedures Mode field diameter 1 Scope This part of IEC 60793 establishes uniform requirements for measuring the mode field diameter (MFD) of optical fibre, thereby assisting in the inspection of fibres and c
41、ables for commercial purposes. The MFD represents a measure of the transverse extent of the electromagnetic field intensity of the mode in a fibre cross 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)
42、. The definitions of MFD are strictly related to the measurement configurations. The mathematical equivalence of these definitions results from transform relationships between measurement results obtained by different implementations summarized in figure 1 as follows: Far-field scan Variable apertur
43、e technique Hankel transform Integration Near field scan Figure 1 Transform relationships between measurement results Four methods are described for measuring MFD: method A: direct far-field scan; method B: variable aperture in the far field; method C: near-field scan; method D: bi-directional backs
44、catter 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 and 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
45、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 706/01 Page 6 EN 60793145:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Normative
46、references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60793. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on thi
47、s part of IEC 60793 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid In
48、ternational Standards. IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-2:1998, Optical fibres 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 use
49、d 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 each of the four methods, respectively. 4.1 Light source For methods A, B and C, use a suitable coherent or non-coherent light source such as a semic