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1、 TIA STANDARD FOTP-191 IEC-60793-1-45 Optical Fibres Part 1-45: Measurement Methods and Test Procedures Mode Field Diameter TIA-455-191-B (Revision of TIA/EIA-455-191-A) NOVEMBER 2003 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electro
2、nic Industries Alliance ANSI/TIA-455-191-B-2003 Approved: November 26, 2003 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted with
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8、ese Materials are subject to copyright claims of IEC, ANSI, and TIA. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of TIA. All requests pertaining to the FOTP-191-B IEC-60793-1-45 Measurement Methods and Test
9、 Procedures Mode Field Diameter Standard should be submitted to TIA. (From Standards Proposal No. 3-4833-RV2, formulated under the cognizance of the TIA FO-4.6 Subcommittee on Optical Fibers.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 2003 Standards and Technology Department 2500 Wilson B
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23、THOUT SUCH LIMITATIONS. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted without license from IHS -,-,- PLEASE! DONT VIOLATE THE
24、LAW! This document is copyrighted by the TIA and may not be reproduced without prior permission of the Telecommunications Industry Association. For information consult our website at http:/www.tiaonline.org/about/faqDetail.cfm?id=18 Organizations may obtain permission to reproduce a limited number o
25、f copies through entering into a license agreement. For information, contact: Global Engineering Documents 15 Inverness Way East Englewood, CO 80112-5704 U.S.A. or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 Copyright Telecommunications Industry Association Provided by IHS un
26、der license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWARD With the adoption of international standard IEC 60793-1-45 (Optical Fibres Part 1-45: Measurement Methods an
27、d Test Procedures Mode Field Diameter) TIA-455-191-B supercedes the current TIA/EIA-455-191-A (FOTP-191 Measurement of Mode Field Diameter of Single-Mode Optical Fiber). This action was taken under the cognizance of the TIA-FO-4.6 Subcommittee on Optical Fibers. Copyright Telecommunications Industry
28、 Association Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted without license from IHS -,-,- IEC 60793-1-45 adopted as TIA-455-191-B i CONTENTS 1 Scope1 2 Normative references.2 3
29、 Reference test method.2 4 Apparatus2 4.1 Light source 2 4.2 Input optics .3 4.3 Input positioner .3 4.4 Cladding mode stripper3 4.5 High-order mode filter3 4.6 Output positioner.3 4.7 Output optics.3 4.8 Detector 3 4.9 Computer 4 5 Sampling and specimens .4 5.1 Specimen length4 5.2 Specimen end fac
30、e4 6 Procedure4 7 Calculations.4 7.1 Method A Direct far-field scan.4 7.2 Method B Variable aperture in the far field 5 7.3 Method C Near-field scan .6 8 Results 7 8.1 Information to be provided with each measurement7 8.2 Information available upon request 7 9 Specification information7 Annex A (nor
31、mative) Requirements specific to method A Mode field diameter by direct far-field scan.8 A.1 Apparatus .8 A.1.1 Scanning detector assembly Signal detection electronics 8 A.2 Procedure .9 A.3 Calculations 9 A.4 Sample data10 Annex B (normative) Requirements specific to method B Mode field diameter by
32、 variable aperture in the far field 11 B.1 Apparatus .11 B.1.1 Output variable aperture assembly.11 B.1.2 Output optics system .12 B.1.3 Detector assembly and signal detection electronics12 B.2 Procedure .12 B.3 Calculations 13 B.4 Sample data set 13 Copyright Telecommunications Industry Association
33、 Provided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted without license from IHS -,-,- IEC 60793-1-45 adopted as TIA-455-191-B ii Annex C (normative) Requirements specific to method C M
34、ode field diameter by near-field scan14 C.1 Apparatus .14 C.1.1 Magnifying output optics 14 C.1.2 Scanning detector14 C.1.3 Detection electronics .14 C.2 Procedure .15 C.3 Calculations 16 C.3.1 Calculate the centroid 16 C.3.2 Fold the intensity profile.16 C.3.3 Compute the integrals16 C.3.4 Complete
35、 the calculation17 Annex D (normative) Requirements specific to method D Mode field diameter by optical time domain reflectometer (OTDR).18 D.1 Apparatus .18 D.1.1 OTDR18 D.1.2 Optional auxiliary switches.18 D.1.3 Optional computer .19 D.1.4 Test sample.19 D.1.5 Reference sample19 D.2 Procedure .19
36、D.3 Calculations 20 D.3.1 Reference fibre MFD20 Annex E (informative) Sample data sets and calculated values.23 E.1 Method A MFD by direct far-field scan 23 E.2 Method B MFD by variable aperture in the far field24 E.3 Method C MFD by near-field scan.24 Figure 1 Transform relationships between measur
37、ement results.1 Figure A.1 Far-field measurement set 8 Figure B.1 Variable aperture by far-field measurement set .11 Figure C.1 Near-field measurement set-ups .15 Figure D.1 Optical switch arrangement.19 Figure D.2 View from reference fibre A.20 Figure D.3 View from reference fibre B.20 Figure D.4 V
38、alidation example Comparison of methods .21 Table E.1 Sample data, method A MFD by direct far-field scan23 Table E.2 Sample data set, method B MFD by variable aperture in the far field24 Table E.3 Sample data set, method C MFD by near-field scan.24 Copyright Telecommunications Industry Association P
39、rovided by IHS under license with EIALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/29/2007 21:13:14 MDTNo reproduction or networking permitted without license from IHS -,-,- IEC 60793-1-45 adopted as TIA-455-191-B iii INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBR
40、ES Part 1-45: Measurement methods and test procedures Mode field diameter FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
41、 international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested i
42、n the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
43、 conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the 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 intereste
44、d National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote internation
45、al unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the
46、latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
47、of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-45 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This standard, together with the other standards in the
48、IEC 60793-1-4X series, replaces the second edition of IEC 60793-1-4, of which it constitutes a technical revision. The text of this standard is based on the following documents: FDIS Report on voting 86A/674/FDIS 86A/698/RVD 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 Directives, Part 3. Annexes A, B, C and D form an integral part of t