EN 60793-1-60-2017 en Optical fibres - Part 1-60 Measurement methods and test procedures - Beat length.pdf

1、Optical fibresPart 1-60: Measurement methods and test procedures Beat lengthBS EN 60793-1-60:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60793-1-60 May 2017 ICS 33.180.10 English Version Optical fibres - Pa

2、rt 1-60: Measurement methods and test procedures - Beat length (IEC 60793-1-60:2017) Fibres optiques - Partie 1-60: Mthodes de mesure et procdures dessai - Longueur de battement (IEC 60793-1-60:2017) Lichtwellenleiter - Teil 1-60: Messmethoden und Prfverfahren - Schwebungslnge (IEC 60793-1-60:2017)

3、This European Standard was approved by CENELEC on 2017-03-14. 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

4、references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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

5、 of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Forme

6、r Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electro

7、technical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref

8、. No. EN 60793-1-60:2017 E National forewordThis British Standard is the UK implementation of EN 60793-1-60:2017. It is identical to IEC 60793-1-60:2017.The UK participation in its preparation was entrusted to Technical Committee GEL/86/1, Optical fibres and cables.A list of organizations represente

9、d on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 935

10、18 3ICS 33.180.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDA

11、RDBS EN 60793-1-60:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60793-1-60 May 2017 ICS 33.180.10 English Version Optical fibres - Part 1-60: Measurement methods and test procedures - Beat length (IEC 60793-1-60:2017) Fibres optiques - Partie 1-60: Mthodes de mesure et procdures dessai -

12、 Longueur de battement (IEC 60793-1-60:2017) Lichtwellenleiter - Teil 1-60: Messmethoden und Prfverfahren - Schwebungslnge (IEC 60793-1-60:2017) This European Standard was approved by CENELEC on 2017-03-14. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate

13、 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 obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European S

14、tandard 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members

15、are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway,

16、 Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: A

17、venue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60793-1-60:2017 E BS EN 60793-1-60:2017EN 60793-1-60:2017 2 European foreword The text of document 86A/1737/CDV, future edition 1 of IEC 60793-1-6

18、0, prepared by SC 86A “Fibres and cables“ of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60793-1-60:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical

19、national standard or by endorsement (dop) 2017-12-14 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2020-03-14 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not

20、 be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60793-1-60:2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for

21、 the standard indicated : IEC 60793-2 NOTE Harmonized as EN 60793-2. BS EN 60793-1-60:2017EN 60793-1-60:2017 2 European foreword The text of document 86A/1737/CDV, future edition 1 of IEC 60793-1-60, prepared by SC 86A “Fibres and cables“ of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC

22、parallel vote and approved by CENELEC as EN 60793-1-60:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-12-14 latest date by which the national standards confli

23、cting with the document have to be withdrawn (dow) 2020-03-14 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the

24、International Standard IEC 60793-1-60:2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated : IEC 60793-2 NOTE Harmonized as EN 60793-2. EN 60793-1-60:2017 3 Annex ZA (nor

25、mative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For und

26、ated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European

27、Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60068-1 - Environmental testing - Part 1: General and guidance EN 60068-1 - IEC 60793-1-1 - Optical fibres - Part 1-1: Measurement methods and test procedures - General and guidance EN 60793-1-1 -

28、 IEC 60793-1-48 - Optical fibres - Part 1-48: Measurement methods and test procedures - Polarization mode dispersion EN 60793-1-48 - IEC 60793-2-70 - Optical fibres - Part 2-70: Product specifications - Sectional specification for polarization-maintaining fibres EN 60793-2-70 - BS EN 60793-1-60:2017

29、This page deliberately left blank 2 IEC 60793-1-60:2017 IEC 2017 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions 5 4 Testing conditions . 6 5 Reference test method 6 6 Specimen 6 7 Test methods . 6 Phase beat length measurement methods . 6 7.17.1.1 General . 6 7.1.2

30、Monitoring of output power using an electromagnet . 6 7.1.3 Monitoring of SOP using a lateral force 8 Group beat length measurement method . 10 7.27.2.1 General . 10 7.2.2 Apparatus and procedure. 10 7.2.3 Calculation 11 8 Results 11 Information available with each measurement . 11 8.1Information av

31、ailable upon request . 12 8.2Annex A (informative) Difference of beat lengths by measurement method (phase beat length and group beat length) . 13 Phase modal birefringence and phase beat length 13 A.1Group modal birefringence and group beat length . 13 A.2Annex B (informative) Correlation between r

32、esults obtained by the two methods (phase beat length and group beat length) 16 General . 16 B.1Example of correlation between phase and group beat lengths in the case of B.2PANDA fibres 16 Example of correlation between phase and group beat lengths in the case of B.3elliptical core fibres . 17 Anne

33、x C (informative) Electromagnet for Faraday rotation . 18 Bibliography 19 Figure 1 Apparatus of phase beat length measurement using an electromagnet . 6 Figure 2 Example of measurement profile by electromagnet 8 Figure 3 Set-up for measuring LB(phase)when monitoring SOP together with a moving latera

34、l force 9 Figure 4 SOP measured at different levels of lateral force 10 Figure 5 Example of SOP evolution and normalized Stokes vector components 10 Figure B.1 Wavelength dependence of Bgroup/Bphase3 16 Figure C.1 Schematic of the electromagnet 18 Table B.1 Bgroup/Bphaseof elliptical core fibres 17

35、2 IEC 60793-1-60:2017 IEC 2017 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Terms and definitions 5 4 Testing conditions . 6 5 Reference test method 6 6 Specimen 6 7 Test methods . 6 Phase beat length measurement methods . 6 7.17.1.1 General . 6 7.1.2 Monitoring of output power using a

36、n electromagnet . 6 7.1.3 Monitoring of SOP using a lateral force 8 Group beat length measurement method . 10 7.27.2.1 General . 10 7.2.2 Apparatus and procedure. 10 7.2.3 Calculation 11 8 Results 11 Information available with each measurement . 11 8.1Information available upon request . 12 8.2Annex

37、 A (informative) Difference of beat lengths by measurement method (phase beat length and group beat length) . 13 Phase modal birefringence and phase beat length 13 A.1Group modal birefringence and group beat length . 13 A.2Annex B (informative) Correlation between results obtained by the two methods

38、 (phase beat length and group beat length) 16 General . 16 B.1Example of correlation between phase and group beat lengths in the case of B.2PANDA fibres 16 Example of correlation between phase and group beat lengths in the case of B.3elliptical core fibres . 17 Annex C (informative) Electromagnet fo

39、r Faraday rotation . 18 Bibliography 19 Figure 1 Apparatus of phase beat length measurement using an electromagnet . 6 Figure 2 Example of measurement profile by electromagnet 8 Figure 3 Set-up for measuring LB(phase)when monitoring SOP together with a moving lateral force 9 Figure 4 SOP measured at

40、 different levels of lateral force 10 Figure 5 Example of SOP evolution and normalized Stokes vector components 10 Figure B.1 Wavelength dependence of Bgroup/Bphase3 16 Figure C.1 Schematic of the electromagnet 18 Table B.1 Bgroup/Bphaseof elliptical core fibres 17 BS EN 60793-1-60:2017IEC 60793-1-6

41、0:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-60: Measurement methods and test procedures Beat length FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committ

42、ees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical R

43、eports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental an

44、d non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreemen

45、ts of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and

46、are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote in

47、ternational uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated i

48、n the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All u

49、sers should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC