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IEC_TR_62221-2012.pdf

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1、 IEC/TR 62221 Edition 2.0 2012-12 TECHNICAL REPORT Optical fibres Measurement methods Microbending sensitivity IEC/TR 62221:2012(E)colourinsideCopyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distributi

2、on is permitted.Uncontrolled when printed.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying

3、 and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC mem

4、ber National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publis

5、hes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.Useful

6、 links:IEC publications search-www.iec.ch/searchpub The advanced search enables you to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished

7、 Stay up to date on all new IEC publications.Just Published details all new publications released.Available on-line and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitio

8、ns in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary(IEV)on-line.Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer S

9、ervice Centre:csciec.ch.Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC/TR 62221 Edition 2.0 2012-12 TECHNICAL REPORT Optical fibres Measurement

10、methods Microbending sensitivity INTERNATIONAL ELECTROTECHNICAL COMMISSION T ICS 33.180.10 PRICE CODE ISBN 978-2-83220-500-6 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyright

11、ed material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 TR 62221 IEC:2012(E)CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 General properties of microbend

12、ing loss.7 4 General considerations.7 Launch condition for multimode fibres.7 4.1 Sample lengths.7 4.2 Winding tension.7 4.3 Relaxation time.8 4.4 Material used for fixed roughness.8 4.5 Drum materials.8 4.6 Drum material for temperature cycling.8 4.75 Test procedures.8 Method A:expandable drum.8 5.

13、1 General.8 5.1.1 Apparatus.8 5.1.2 Procedure.9 5.1.3 Calculations.9 5.1.4 Method B:fixed diameter drum.10 5.2 General.10 5.2.1 Apparatus.10 5.2.2 Procedure.12 5.2.3 Calculations.12 5.2.4 Method C:plate test.13 5.3 General.13 5.3.1 Apparatus.13 5.3.2 Procedure.14 5.3.3 Calculations.14 5.3.4 Method D

14、:basketweave.15 5.4 General.15 5.4.1 Apparatus.15 5.4.2 Procedure.16 5.4.3 Calculations or interpretation of results.17 5.4.46 Results.17 Annex A(informative)Representative results with method B.19 Bibliography.24 Figure 1 Set-up for expandable drum method used in an optical fibre testing facility.9

15、 Figure 2 Standard winding/prooftester can be used for preparing the sample.11 Figure 3 Example of a possible set-up in temperature cycling.11 Figure 4 Alternative wire mesh set-up used in an optical fibre testing facility.12 Figure 5 Microbend-inducing equipment.13 Figure 6 Quartz drum with basketw

16、oven fibre.15 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.TR 62221 IEC:2012(E)3 Figure 7 Basketweave example as used in an optical fibre testing facility.16 Figure 8 Example of temperature cycle inside chamber.17 Figure A.1 Example of temperature cycling of 10 different unshifted single-mode fibres(wavelength 1 310 nm).20 Figure A.2 Exampl

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