1、 IEC 60793-2-50 Edition 5.0 2015-11 INTERNATIONAL STANDARD Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60793-2-50:2015-11(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rights reser
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11、ecification for class B single-mode fibres INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.10 ISBN 978-2-8322-3023-7 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 60
12、793-2-50:2015 IEC 2015 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references 7 3 Terms and definitions 8 4 Abbreviations and symbols 9 5 Specifications 9 5.1 General . 9 5.2 Dimensional requirements . 9 5.3 Mechanical requirements 10 5.4 Transmission requirements . 11 5.5 Environmental requirements
13、 . 12 5.5.1 General . 12 5.5.2 Optical environmental requirements Attenuation . 13 5.5.3 Mechanical environmental requirements 13 Annex A (normative) Family specification for category B1.1 single-mode fibres . 15 A.1 General . 15 A.2 Dimensional requirements . 15 A.3 Mechanical requirements 15 A.4 T
14、ransmission requirements . 16 A.5 Environmental requirements . 16 Annex B (normative) Family specification for category B1.2 single-mode fibres . 17 B.1 General . 17 B.2 Dimensional requirements . 17 B.3 Mechanical requirements 17 B.4 Transmission requirements . 18 B.5 Environmental requirements . 1
15、8 Annex C (normative) Family specification for category B1.3 single-mode fibres . 19 C.1 General . 19 C.2 Dimensional requirements . 19 C.3 Mechanical requirements 19 C.4 Transmission requirements . 20 C.5 Hydrogen ageing for category B1.3 . 20 C.6 Environmental requirements . 21 Annex D (normative)
16、 Family specification for category B2 single-mode fibres 22 D.1 General . 22 D.2 Dimensional requirements . 22 D.3 Mechanical requirements 22 D.4 Transmission requirements . 23 D.4.1 General . 23 D.4.2 Chromatic dispersion coefficient requirement for sub-category B2_a fibres . 23 D.4.3 Chromatic dis
17、persion coefficient requirement for sub-category B2_b fibres . 24 D.5 Environmental requirements . 24 Annex E (normative) Family specification for category B4 single-mode fibres 25 E.1 General . 25 IEC 60793-2-50:2015 IEC 2015 3 E.2 Dimensional requirements . 25 E.3 Mechanical requirements 25 E.4 Tr
18、ansmission requirements . 26 E.4.1 General . 26 E.4.2 Chromatic dispersion coefficient limits for sub-category B4_c fibres 26 E.4.3 Chromatic dispersion coefficient limits for sub-category B4_d fibres 27 E.4.4 Chromatic dispersion coefficient limits for sub-category B4_e fibres 27 E.5 Environmental
19、requirements . 27 Annex F (normative) Family specification for category B5 single-mode fibres . 28 F.1 General . 28 F.2 Dimensional requirements . 28 F.3 Mechanical requirements 28 F.4 Transmission requirements . 29 F.4.1 General . 29 F.4.2 Chromatic dispersion coefficient for category B5 fibres 29
20、F.5 Environmental requirements . 30 Annex G (normative) Family specification for category B6 single-mode fibres 31 G.1 General . 31 G.2 Dimensional requirements . 31 G.3 Mechanical requirements 32 G.4 Transmission requirements . 32 G.5 Environmental requirements . 33 Annex H (informative) System des
21、ign information for category B4 single-mode fibres 34 H.1 General . 34 H.2 One standard deviation limits for sub-category B4_d fibres . 34 H.3 One standard deviation limits for sub-category B4_e fibres . 35 Annex I (informative) Map from IEC nomenclature to ITU-T recommendations . 36 Bibliography 37
22、 Figure H.1 Sub-category B4_d chromatic dispersion coefficient limits 35 Figure H.2 Sub-category B4_e chromatic dispersion coefficient limits 35 Table 1 Dimensional attributes and measurement methods 9 Table 2 Dimensional requirements common to all category B fibres . 10 Table 3 Mechanical attribute
23、s and test methods . 10 Table 4 Mechanical requirements common to all class B fibres 11 Table 5 Transmission attributes and measurement methods 11 Table 6 Transmission, requirements common to all class B fibres 12 Table 7 Additional transmission attributes required in the family specifications 12 Ta
24、ble 8 Environmental exposure tests . 12 Table 9 Attributes measured in environmental exposure tests 12 Table 10 Change in attenuation for environmental tests . 13 Table 11 Coating strip force for environmental tests . 13 Table 12 Tensile strength for environmental tests 13 Table 13 Stress corrosion
25、susceptibility for environmental tests . 14 Table A.1 Dimensional requirements specific to category B1.1 fibres . 15 4 IEC 60793-2-50:2015 IEC 2015 Table A.2 Mechanical requirements specific to category B1.1 fibres 15 Table A.3 Transmission requirements specific to category B1.1 fibres . 16 Table B.
26、1 Dimensional requirements specific to category B1.2 fibres . 17 Table B.2 Mechanical requirements specific to category B1.2 fibres 18 Table B.3 Transmission requirements specific to category B1.2 fibres . 18 Table C.1 Dimensional requirements specific to category B1.3 fibres . 19 Table C.2 Mechanic
27、al requirements specific to category B1.3 fibres 19 Table C.3 Transmission requirements specific to category B1.3 fibres . 20 Table D.1 Dimensional requirements specific to category B2 fibres 22 Table D.2 Mechanical requirements specific to category B2 fibres . 23 Table D.3 Transmission requirements
28、 specific to category B2 fibres 23 Table E.1 Dimensional requirements specific to category B4 fibres 25 Table E.2 Mechanical requirements specific to category B4 fibres . 26 Table E.3 Transmission requirements specific to category B4 fibres 26 Table F.1 Dimensional requirements specific to category
29、B5 fibres 28 Table F.2 Mechanical requirements specific to category B5 fibres 29 Table F.3 Transmission requirements specific to category B5 fibres 29 Table G.1 Dimensional requirements specific to category B6 fibres . 32 Table G.2 Mechanical requirements specific to category B6 fibres . 32 Table G.
30、3 Transmission requirements specific to category B6 fibres 33 Table H.1 Examples for min= 1 530 nm and max= 1 565 nm 34 Table I.1 Map of IEC to ITU . 36 IEC 60793-2-50:2015 IEC 2015 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 2-50: Product specifications Sectional specification
31、 for class B single-mode fibres FOREWORD 1) The International Electrotechnical Commission (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 c
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41、ttention 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 patent rights. International Standard IEC 60793-2-50 has been prepared by subcommittee 86A: Fibres and cables,
42、 of IEC technical committee 86: Fibre optics. This fifth edition cancels and replaces the fourth edition, published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) aligns the requiremen
43、ts with the ITU-T Recommendations G.654 (2012-10) and G.657 (2012-10); b) adds a new sub-category B1.2_d; c) modifies B6 sub-categories in terms of attenuation and chromatic dispersion coefficient. 6 IEC 60793-2-50:2015 IEC 2015 The text of this standard is based on the following documents: CDV Repo
44、rt on voting 86A/1571/CDV 86A/1614/RVC 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 2. A list of all parts in the IEC 60793 series
45、published under the general title Optical fibres, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publicatio
46、n. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are consi
47、dered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC 60793-2-50:2015 IEC 2015 7 OPTICAL FIBRES Part 2-50: Product specifications Sectional specification for class B single-mode fibres 1 Scope This part of IEC 60793 i
48、s applicable to optical fibre categories B1.1, B1.2, B1.3, 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 r
49、equirements apply to 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 5; particular requirements applicable to individual fibre categories or specific applications, which are defined in Annexes A to G. For some fibre categories (shown in the relevant family specifications), there are sub-
