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
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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