1、 TIA STANDARD ANSI/TIA-455-175-B-2003 Approved: May 21, 2003 FOTP-175 IEC-60793-1-42 Optical Fibres Part 1-42: Measurement Methods and Test Procedures Chromatic Dispersion TIA-455-175-B (Revision of TIA/EIA-455-175-A) MAY 2003 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunicatio
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23、or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 FOREWARD With the adoption of international standard IEC 60793-1-42 (Optical Fibres Part 1-42: Measurement Methods and Test Procedures Chromatic Dispersion) TIA-455-175-B supercedes the current TIA-455-175-A (FOTP-175 Chromatic D
24、ispersion Measurement of Single-Mode Optical Fibers by the Differential Phase-Shift Method). It replaces (FOTP-168 Chromatic Dispersion Measurement of Multimode Graded-Index and Single-Mode Optical Fibers by Spectral Group Delay Measurement in the Time Domain) and (FOTP-169 Chromatic Dispersion Meas
25、urement of Single-Mode Optical Fibers by the Phase-Shift Method) This action was taken under the cognizance of the TIA FO-4.6 Subcommittee on Optical Fibers. 60793-1-42 IEC:2001 TIA-455-175-B CONTENTS 1 Scope 1 2 Normative references.1 3 Overview of methods2 4 Reference test methods .3 5 Apparatus 3
26、 6 Sampling and specimens .4 7 Procedure4 8 Calculations.5 9 Results 7 10 Specification information 8 Annex A (normative) Requirements specific to method A Phase shift.9 Annex B (normative) Requirements specific to method B Spectral group delay in the time domain . 16 Annex C (normative) Requirement
27、s specific to method C Differential phase shift. 21 Annex D (normative) Requirements specific to method D Interferometry 29 Figure A.1 Chromatic dispersion measurement set Multiple laser system (typical) . 10 Figure A.2 Typical delay and dispersion curves 11 Figure A.3 Chromatic dispersion measureme
28、nt set LED system (typical) . 14 Figure B.1 Block diagram Fibre Raman laser system. 17 Figure B.2 Block diagram Multiple laser diode system . 18 Figure C.1 Chromatic dispersion measurement set Multiple laser system 23 Figure C.2 Chromatic dispersion measurement set LED system 24 Figure C.3 Fibre chr
29、omatic dispersion measurement set Differential phase by dual wavelength method 25 Figure C.4 Fibre chromatic dispersion measurement set Differential phase by double demodulation . 26 Figure D.1 Fibre chromatic dispersion test set Interferometry by fibre reference path 31 Figure D.2 Fibre chromatic d
30、ispersion test set Interferometry by air reference path . 32 Figure D.3 Examples of delay data 32 i60793-1-42 IEC:2001 TIA-455-175-B INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-42: Measurement methods and test procedures Chromatic dispersion FOREWORD 1) The IEC (International E
31、lectrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic field
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37、r 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 of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. Internat
38、ional Standard IEC 60793-1-42 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 IEC 60793-1-4X series, replaces the second edition of IEC 60793-1-4, of which it constitutes a technical revisi
39、on. The text of this standard is based on the following documents: FDIS Report on voting 86A/671/FDIS 86A/695/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 t
40、he ISO/IEC Directives, Part 3. Annexes A, B, C and D form an integral part of this standard. ii60793-1-42 IEC:2001 TIA-455-175-B IEC 60793-1-1 and IEC 60793-1-2 cover generic specifications. IEC 60793-1-4X consists of the following parts, under the general title: Optical fibres: Part 1-40: Measureme
41、nt methods and test procedures Attenuation Part 1-41: Measurement methods and test procedures Bandwidth Part 1-42: Measurement methods and test procedures Chromatic dispersion Part 1-43: Measurement methods and test procedures Numerical aperture Part 1-44: Measurement methods and test procedures Cut
42、-off wavelength Part 1-45: Measurement methods and test procedures Mode field diameter Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance Part 1-47: Measurement methods and test procedures Macrobending loss Part 1-48: Measurement methods and test proced
43、ures Under consideration Part 1-49: Measurement methods and test procedures Under consideration The committee has decided that the contents of this publication will remain unchanged until 2003. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. i
44、ii60793-1-42 IEC:200 TIA-455-175-B INTRODUCTION 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, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29: Measurement
45、methods and test procedures for dimensions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical charac-teristics 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
46、for environmental characteristics. iv60793-1-42 IEC:2001 TIA-455-175-B OPTICAL FIBRES Part 1-42: Measurement methods and test procedures Chromatic dispersion 1 Scope This part of IEC 60793 establishes uniform requirements for measuring the chromatic dispersion of optical fibre, thereby assisting in
47、the inspection of fibres and cables for commercial purposes. Four methods are described for measuring chromatic dispersion: method A: phase shift; method B: spectral group delay in the time domain; method C: differential phase shift; method D: interferometry. Methods A, B and C apply to the measurem
48、ent of chromatic dispersion of the following fibres over a specified wavelength range: class A1 graded-index multimode fibres; class B single-mode fibres (all categories). Method D applies to the measurement of chromatic dispersion values of single-mode fibres categories B1 to B3 in the 1 000 nm to
49、1 700 nm wavelength range. The methods can be applied to laboratory, factory and field measurements of chromatic dispersion, and the wavelength range of the measurements can be tailored as required. Measurements are made at temperatures as stated in IEC 60793-1-1. The methods are suitable for fibre or cable lengths greater than 1 km. They may also be applied to shorter lengths, but accuracy and repeatability may be compr
