1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Optical fibres Part 1-47: Measurement methods and test procedures Macrobending lossBS EN 60793-1-47:2009National
2、forewordThis British Standard is the UK implementation of EN 60793-1-47:2009. It isidentical to IEC 60793-1-47:2009. It supersedes BS EN 60793-1-47:2007which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/86, Fibre optics, to Subcommittee GEL/86/1, Optic
3、al fibres and cables.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 60763 9ICS 33.180.10
4、Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2009Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60793-1-47:2009E
5、UROPEAN STANDARD EN 60793-1-47 NORME EUROPENNE EUROPISCHE NORM June 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENE
6、LEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60793-1-47:2009 E ICS 33.180.10 Supersedes EN 60793-1-47:2007English version Optical fibres - Part 1-47: Measurement methods and test procedures - Macrobending loss (IEC 60793-1-47:2009)
7、 Fibres optiques - Partie 1-47: Mthodes de mesure et procdures dessai - Pertes dues aux macrocourbures (CEI 60793-1-47:2009) Lichtwellenleiter -Teil 1-47: Messmethoden und Prfverfahren - Makrobiegeverlust (IEC 60793-1-47:2009) This European Standard was approved by CENELEC on 2009-05-01. CENELEC mem
8、bers 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 obtained on applicat
9、ion 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 Secretariat
10、has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Nether
11、lands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 60793-1-47:2009 2 Foreword The text of document 86A/1207/CDV, future edition 3 of IEC 60793-1-47, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to th
12、e IEC-CENELEC parallel vote and was approved by CENELEC as EN 60793-1-47 on 2009-05-01. This European Standard supersedes EN 60793-1-47:2007. The main change from EN 60793-1-47:2007 is listed below: introduction of the Annex A describing small bend radius phenomena. This standard is to be read in co
13、njunction with EN 60793-1-1. 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) 2010-02-01 latest date by which the national standards conflicting with the EN have to be withdraw
14、n (dow) 2012-05-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60793-1-47:2009 was approved by CENELEC as a European Standard without any modification. _ BS EN 60793-1-47:2009 3 EN 60793-1-47:2009 Annex ZA (normative) Normative references to in
15、ternational publications with their corresponding European publications 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 an
16、y amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60793-1-1 - 1)Optical fibres - Part 1-1: Measurement methods and test procedures - General and guidance EN 60
17、793-1-1 2008 2)IEC 60793-1-40 (mod) - 1)Optical fibres - Part 1-40: Measurement methods and test procedures - Attenuation EN 60793-1-40 2003 2)IEC 60793-1-46 - 1)Optical fibres - Part 1-46: Measurement methods and test procedures - Monitoring of changes in optical transmittance EN 60793-1-46 2002 2)
18、IEC 61280-4-1 - 1)Fibre-optic communication subsystem test procedures - Part 4-1: Cable plant and links - Multimode fibre-optic cable plant attenuation measurement EN 61280-4-1 2004 2)1) Undated reference. 2)Valid edition at date of issue. BS EN 60793-1-47:2009 2 60793-1-47 IEC:2009(E) CONTENTS FORE
19、WORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Specimen .7 3.1 Specimen length7 3.1.1 Method A Fibre winding 7 3.1.2 Method B Quarter circle bends .7 3.2 Specimen end face7 4 Apparatus.7 4.1 Method A Fibre winding7 4.2 Method B Quarter circle bends .7 5 Procedure 8 5.1 Method A Fibre wi
20、nding8 5.1.1 General .8 5.1.2 Single-mode fibres 9 5.1.3 Multimode (A1) fibres 10 5.2 Method B Quarter circle bends .10 6 Calculations .12 7 Results.12 7.1 Information available with each measurement .12 7.2 Information available upon request12 8 Specification information 13 Annex A (informative) Sm
21、all bend radius phenomena 14 Bibliography16 Figure 1 Quarter circle guide groove in plate8 Figure 2 Multiple bends using stacked plates .11 Figure A.1 Loss curves versus curve fits14 BS EN 60793-1-47:200960793-1-47 IEC:2009(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-47: M
22、easurement methods and test procedures Macrobending loss FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-ope
23、ration 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 Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to a
24、s “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 and non-governmental organizations liaising with the IEC also participate in this pre
25、paration. 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 agreements of IEC on technical matters express, as nearly as possible, an international con
26、sensus 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 are accepted by IEC National Committees in that sense. While all reasonable efforts
27、 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 international uniformity, IEC National Committees undertake to apply IEC Publications
28、 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 in the latter. 5) IEC provides no marking procedure to indicate its approval and can
29、not be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users 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 m
30、embers 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 Publicatio
31、n or any other IEC Publications. 8) Attention is drawn to the Normative 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 Publicatio
32、n may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-47 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This third edition cancels and replaces
33、 the second edition published in 2006. It constitutes a technical revision. The main change is listed below: Introduction of the Annex A describing small bend radius phenomena. This standard is to be read in conjunction with IEC 60793-1-1. BS EN 60793-1-47:2009 4 60793-1-47 IEC:2009(E) The text of t
34、his standard is based on the following documents: CDV Report on voting 86A/1207/CDV 86A/1240/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Direct
35、ives, Part 2. A list of all parts of IEC 60793 series, published under the general title Optical fibres, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:
36、/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. BS EN 60793-1-47:200960793-1-47 IEC:2009(E) 5 INTRODUCTIO
37、N 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, but all numbers are possibly not used, as follows: Parts 1-10 to 1-19: General Parts 1-20 to 1-29: Measurement method
38、s and test procedures for dimensions Parts 1-30 to 1-39: Measurement methods and test procedures for mechanical characteristics 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 env
39、ironmental characteristics BS EN 60793-1-47:2009 6 60793-1-47 IEC:2009(E) OPTICAL FIBRES Part 1-47: Measurement methods and test procedures Macrobending loss 1 Scope This part of IEC 60793 establishes uniform requirements for measuring the macrobending loss of single-mode fibres (category B) at 1 55
40、0 nm or 1 625 nm, category A1 multimode fibres at 850 nm or 1 300 nm, and category A3 and A4 multimode fibres at 650 nm, 850 nm or 1 300 nm, thereby assisting in the inspection of fibres and cables for commercial purposes. The standard gives two methods for measuring macrobending sensitivity: Method
41、 A Fibre winding, pertains to category B single-mode fibres and category A1 multimode fibres. Method B Quarter circle bends, pertains to category A3 and A4 multimode fibres. For both of these methods, the optical power is measured using either the power monitoring or the cut-back technique. Methods
42、A and B are expected to produce different results if they are applied to the same fibre. This is because the key difference between the two methods is the deployment, including the bend radius and amount of fibre that is bent. The reason for the difference is that A3 and A4 multimode fibres are expe
43、cted to be deployed in short lengths with relatively fewer bends compared to single-mode and category A1 multimode fibres. In the following text, the “curvature radius” is defined as the radius of the suitable circular shaped support (e.g. mandrel or guiding groove on a flat surface) on which the fi
44、bre can be bent. 2 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
45、-1-1: Optical fibres Part 1-1: Measurement methods and test procedures General and guidance IEC 60793-1-40: Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-46: Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical
46、 transmittance IEC 61280-4-1: Fibre-optic communication subsystem test procedures Part 4-1: Cable plant and links Multimode fibre-optic cable plant attenuation measurement BS EN 60793-1-47:200960793-1-47 IEC:2009(E) 7 3 Specimen 3.1 Specimen length 3.1.1 Method A Fibre winding The specimen shall be
47、a known length of fibre, as specified in the detail specification. In particular, the length of the sample tested for loss is determined by the measurement set-up, i.e. curvature radius (R) and number of turns (N); any further fibre length does not affect the measurement results, provided that the s
48、ignal to noise (S/N) ratio is optimised. 3.1.2 Method B Quarter circle bends The specimen length shall be determined according to the details shown in 5.2. 3.2 Specimen end face Prepare a flat end face, orthogonal to the fibre axis, at the input and output ends of each test specimen. 4 Apparatus 4.1
49、 Method A Fibre winding The apparatus consists of a tool (e.g. a mandrel or a guiding groove on a flat surface) able to hold the sample bent with a radius as stated in the specification (e.g. 30 mm for single-mode fibres and 37,5 mm for multimode fibres) and a loss-measurement instrument. Determine the macrobending loss at the wavelength as stated in the specification (e.g. 850 nm or 1 300 nm for multimode fi
