1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21629-0 SANS 60793-2-50:2008 Edition 3 IEC 60793-2-50:2008 Edition 3SOUTH AFRICAN NATIONAL STANDARD Optical fibres Part 2-50: Product spec
4、ifications Sectional specification for class B single-mode fibres This national standard is the identical implementation of IEC 60793-2-50:2008 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be used in conjunction with SANS 60793-2. Published by
5、 SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 60793-2-50:2008 Edition 3 IEC 60793-2-50:200
6、8 Edition 3 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 74A, Communication technology Fibre optics, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. T
7、his SANS document was published in September 2008. This SANS document supersedes SANS 60793-2-50:2005 (edition 2). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 60793-2-50 Edition 3.0 2008-05 INTERNATIONAL STANDARD NORME INTERNATIONALE O
8、ptical fibres Part 2-50: Product specifications Sectional specification for class B single- mode fibres Fibres optiques Partie 2-50: Spcifications de produits Spcification intermdiaire pour les fibres unimodales de classe B INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERN
9、ATIONALE W ICS 33.180.10 PRICE CODE CODE PRIX ISBN 2-8318-9824-2SANS 60793-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 60793-2-50 IEC:2008 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Abbr
10、eviations and symbols.7 5 Specifications.8 5.1 General .8 5.2 Dimensional requirements .8 5.3 Mechanical requirements.9 5.4 Transmission requirements .10 5.5 Environmental requirements11 5.5.1 Optical environmental requirements.12 5.5.2 Mechanical environmental requirements12 Annex A (normative) Fam
11、ily specification for B1.1 single-mode fibres14 Annex B (normative) Family specification for B1.2 single-mode fibres16 Annex C (normative) Family specification for B1.3 single-mode fibres18 Annex D (normative) Family specification for B2 single-mode fibres.21 Annex E (normative) Family specification
12、 for B4 single-mode fibres.24 Annex F (normative) Family specification for B5 single-mode fibres.27 Annex G (normative) Family specification for B6 single-mode fibres 30 Annex H (informative) System design information for B4 single-mode fibres 33 Annex I (informative) Map from IEC nomenclature to IT
13、U-T recommendations .36 Bibliography37 Figure H.1 B4_d chromatic dispersion coefficient limits34 Figure H.2 B4_e chromatic dispersion coefficient limits35 Table 1 Dimensional attributes and measurement methods8 Table 2 Requirements common to class B fibres9 Table 3 Mechanical attributes and test met
14、hods.9 Table 4 Requirements common to class B fibres10 Table 5 Transmission attributes and measurement methods 10 Table 6 Requirements common to class B fibres11 Table 7 Additional attributes required in the family specifications.11 Table 8 Environmental exposure tests .11 Table 9 Attributes measure
15、d 11 Table 10 Change in attenuation for environmental tests.12 Table 11 Coating strip force for environmental tests.12 Table 12 Tensile strength for environmental tests 12 Table 13 Stress corrosion susceptibility for environmental tests.13 Table A.1 Dimensional requirements specific to B1.1 fibres .
16、14 Table A.2 Mechanical requirements specific to B1.1 fibres.14 SANS 60793-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60793-2-50 IEC:2008 3 Table A.3 Transmission requirements specific to B1.1 fibres15 Table B.1 Dimensional requir
17、ements specific to B1.2 fibres .16 Table B.2 Mechanical requirements specific to B1.2 fibres.17 Table B.3 Transmission requirements specific to B1.2 fibres17 Table C.1 Dimensional requirements specific to B1.3 fibres .18 Table C.2 Mechanical requirements specific to B1.3 fibres.19 Table C.3 Transmis
18、sion requirements specific to B1.3 fibres .19 Table D.1 Dimensional requirements specific to B2 fibres21 Table D.2 Mechanical requirements specific to B2 fibres22 Table D.3 Transmission requirements specific to B2 fibres 22 Table E.1 Dimensional requirements specific to B4 fibres 24 Table E.2 Mechan
19、ical requirements specific to B4 fibres25 Table E.3 Transmission requirements specific to B4 fibres.25 Table F.1 Dimensional requirements specific to B5 fibres 27 Table F.2 Mechanical requirements specific to B5 fibres28 Table F.3 Transmission requirements specific to B5 fibres.28 Table G.1 Dimensio
20、nal requirements specific to B6 fibres30 Table G.2 Mechanical requirements specific to B6 fibres .31 Table G.3 Transmission requirements specific to B6 fibres 32 Table H.1 Examples for min= 1 530 nm and max= 1 565 nm 33 Table I.1 Map of IEC to ITU .36 SANS 60793-2-50:2008This standard may only be us
21、ed and printed by approved subscription and freemailing clients of the SABS. 4 60793-2-50 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 2-50: Product specifications Sectional specification for class B single-mode fibres FOREWORD 1) The International Electrotechnical Commis
22、sion (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
23、 addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee in
24、terested 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 preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordanc
25、e 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 consensus of opinion on the relevant subjects since each technical committee has representation from all interes
26、ted 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 are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsibl
27、e 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 transparently to the maximum extent possible in their national and regional publications. Any divergence bet
28、ween 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 cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All us
29、ers 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 members of its technical committees and IEC National Committees for any personal injury, property damage or ot
30、her 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 Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication.
31、 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 Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such pate
32、nt rights. International Standard IEC 60793-2-50 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This third edition cancels and replaces the second edition published in 2004 and constitutes a technical revision which: aligns the requirements wit
33、h the relevant ITU-T Recommendations, including tightening the tolerances of many parameters; provides a means for defining the requirements of sub-categories; for B1.2 fibres now includes two sub-categories; for B4 fibres now includes three sub-categories ; for B4 fibres, replaces the traditional m
34、ethod of specifying chromatic dispersion coefficient by limiting curves vs. wavelength for two of the sub-categories; adds a new category, B5, which corresponds to the fibres defined in ITU-T Recommendation G.656; SANS 60793-2-50:2008This standard may only be used and printed by approved subscriptio
35、n and freemailing clients of the SABS.60793-2-50 IEC:2008 5 adds a new category, B6, which corresponds to the fibres defined in ITU-T Recommendation G.657; adds an informative annex that maps the nomenclature of the IEC fibre specifications to that of the ITU-T fibre recommendations; adds a clause f
36、or definitions; adds a clause for abbreviations; removes the dates from the normative references. The text of this standard is based on the following documents: CDV Report on voting 86A/1164/CDV 86A/1170/RVC Full information on the voting for the approval of this standard can be found in the report
37、on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the 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
38、this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/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. SANS 60793-2-
39、50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 60793-2-50 IEC:2008 OPTICAL FIBRES Part 2-50: Product specifications Sectional specification for class B single-mode fibres 1 Scope This part of IEC 60793 is applicable to optical fibre
40、types B1.1, B1.2, B1.3, and categories B2, B4, B5 and B6. A map illustrating the connection of IEC designations to ITU-T designations is shown in Annex I. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. Three types of requirements apply to
41、 these fibres: general requirements, as defined in IEC 60793-2; specific requirements common to the class B single-mode fibres covered in this standard and which are given in Clause 3; particular requirements applicable to individual fibre types or specific applications, which are defined in Annexes
42、 A to G. For some family specifications, there are sub-categories that are distinguished on the basis of difference in transmission attribute specifications. The designations for these sub- categories are documented in the individual family specifications. 2 Normative references The following refere
43、nced 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 60793-1-1, Optical fibres Measurement methods and test procedures
44、 Part 1-1: General and guidance IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-21, Optical fibres Part 1-21: Measurement methods and test procedures Coating geometry IEC 60793-1-22, Optical fibres Part 1-22: Measurement methods and test p
45、rocedures Length measurement IEC 60793-1-30, Optical fibres Part 1-30: Measurement methods and test procedures Fibre proof test IEC 60793-1-31, Optical fibres Part 1-31: Measurement methods and test procedures Tensile strength IEC 60793-1-32, Optical fibres Part 1-32: Measurement methods and test pr
46、ocedures Coating strippability IEC 60793-1-33, Optical fibres Part 1-33: Measurement methods and test procedures Stress corrosion susceptibility SANS 60793-2-50:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60793-2-50 IEC:2008 7 IEC 60793
47、-1-34, Optical fibres Part 1-34: Measurement methods and test procedures Fibre curl IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-42, Optical fibres Part 1-42: Measurement methods and test procedures Chromatic dispersion IEC 60793-1-44, Opt
48、ical fibres Part 1-44: Measurement methods and test procedures Cut- off wavelength IEC 60793-1-45, Optical fibres Part 1-45: Measurement methods and test procedures Mode field diameter IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical
49、transmittance IEC 60793-1-47, Optical fibres Part 1-47: Measurement methods and test procedures Macrobending loss IEC 60793-1-48 Optical fibres Part 1-48: Measurement methods and test procedures Polarization mode dispersion IEC 60793-1-50, Optical fibres Part 1-50: Measurement methods and test procedures Damp heat (steady state) IEC 6
