1、 IEC 60793-2-20 Edition 3.0 2015-11 INTERNATIONAL STANDARD Optical fibres Part 2-20: Product specifications Sectional specification for category A2 multimode fibres IEC 60793-2-20:2015-11(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rights res
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11、specification for category A2 multimode fibres INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.10 ISBN 978-2-8322-3020-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IE
12、C 60793-2-20:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Specifications 7 3.1 General . 7 3.2 Dimensional requirements . 7 3.3 Mechanical requirements . 8 3.4 Transmission requirements 8 3.5 Environmental requirements 9 (normative) Specifications for sub-category A2a mu
13、ltimode fibres . 10 Annex A A.1 General . 10 A.2 Dimensional requirements . 10 A.3 Mechanical requirements . 10 A.4 Transmission requirements 10 A.5 Environmental requirements 11 (normative) Specifications for sub-category A2b multimode fibres . 12 Annex B B.1 General . 12 B.2 Dimensional requiremen
14、ts . 12 B.3 Mechanical requirements . 12 B.4 Transmission requirements 12 B.5 Environmental requirements 13 (normative) Specifications for sub-category A2c multimode fibres . 14 Annex C C.1 General . 14 C.2 Dimensional requirements . 14 C.3 Mechanical requirements . 14 C.4 Transmission requirements
15、14 C.5 Environmental requirements 15 Bibliography . 16 Table 1 Relevant dimensional attributes and measurement methods . 7 Table 2 Dimensional requirements common to all category A2 fibres . 7 Table 3 Additional dimensional attributes required for each sub-category 8 Table 4 Relevant mechanical attr
16、ibutes and test methods . 8 Table 5 Mechanical requirements common to all category A2 fibres 8 Table 6 Relevant transmission attributes and measurement methods 8 Table 7 Requirements common to all category A2 fibres 9 Table 8 Relevant environmental attributes and test methods . 9 Table A.1 Dimension
17、al requirements specific to A2a fibres 10 Table A.2 Mechanical requirements specific to A2a fibres . 10 Table A.3 Transmission requirements specific to A2a fibres . 11 Table A.4 Environmental exposure tests . 11 Table A.5 Attributes measured . 11 IEC 60793-2-20:2015 IEC 2015 3 Table B.1 Dimensional
18、requirements specific to A2b fibres . 12 Table B.2 Mechanical requirements specific to A2b fibres . 12 Table B.3 Transmission requirements specific to A2b fibres 12 Table B.4 Environmental exposure tests . 13 Table B.5 Attributes measured . 13 Table C.1 Dimensional requirements specific to A2c fibre
19、s . 14 Table C.2 Mechanical requirements specific to A2c fibres . 14 Table C.3 Transmission requirements specific to A2c fibres 14 Table C.4 Environmental exposure tests . 15 Table C.5 Attributes measured . 15 4 IEC 60793-2-20:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES
20、Part 2-20: Product specifications Sectional specification for category A2 multimode 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
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29、rect 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. Use of the referenced publications is indispen
30、sable 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 patent rights. International Standard IEC 60793-2-2
31、0 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 2007. This edition constitutes a technical revision. This edition includes the following significant technical changes wit
32、h respect to the previous edition: a) Na thhas been replaced by NA ff ; b) specified test specimen length and measurement details for core diameter and NA ffmeasurements. IEC 60793-2-20:2015 IEC 2015 5 The text of this standard is based on the following documents: CDV Report on voting 86A/1602/CDV 8
33、6A/1628A/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, published under the gener
34、al 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 website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publi
35、cation 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 considered to be useful for the
36、 correct understanding of its contents. Users should therefore print this document using a colour printer. 6 IEC 60793-2-20:2015 IEC 2015 OPTICAL FIBRES Part 2-20: Product specifications Sectional specification for category A2 multimode fibres 1 Scope This part of IEC 60793 is applicable to sub-cate
37、gories A2a, A2b, and A2c. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables (typically up to 2 km). Three types of requirements apply to these fibres: general requirements as defined in IEC 60793-2; specific requirements common to the categor
38、y A2 multimodal fibres covered in this standard and which are given in Clause 3; particular requirements applicable to individual sub-categories or specific applications, which are defined in the normative family specification annexes. 2 Normative references The following documents, in whole or in p
39、art, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-1-20:2001, Optical fibres Part 1-20: M
40、easurement 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 procedures Length measurement IEC 60793-1-30, Optical fibres Part 1-30: Meas
41、urement methods and test procedures Fibre proof test IEC 60793-1-31, Optical fibres Part 1-31: Measurement methods and test procedures Tensile strength IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-41, Optical fibres Part 1-41: Measurement
42、methods and test procedures Bandwidth IEC 60793-1-43, Optical fibres Part 1-43: Measurement methods and test procedures Numerical aperture measurement IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance IEC 60793-2-20:2015
43、IEC 2015 7 IEC 60793-1-50, Optical fibres Part 1-50: Measurement methods and test procedures Damp heat (steady state) tests IEC 60793-1-51, Optical fibres Part 1-51: Measurement methods and test procedures Dry heat (steady state) tests IEC 60793-1-52, Optical fibres Part 1-52: Measurement methods an
44、d test procedures Change of temperature tests IEC 60793-2, Optical fibres Part 2: Product specifications General 3 Specifications 3.1 General The fibre shall consist of a glass core and a glass cladding in accordance with the definition given in IEC 60793-2. 3.2 Dimensional requirements Relevant dim
45、ensional attributes and measurement methods are indicated in Table 1. Dimensional requirements common to all sub-categories appear in Table 2. Table 3 lists additional dimensional attributes that shall be specified by each sub-category. Table 1 Relevant dimensional attributes and measurement methods
46、 Attribute Measurement method Cladding diameter IEC 60793-1-20 Core diameter aIEC 60793-1-20 Core non-circularity IEC 60793-1-20 Core-cladding concentricity error IEC 60793-1-20 Coating diameter IEC 60793-1-21 Fibre length IEC 60793-1-22 aCore diameter is specified at 850 nm 10 nm with a test specim
47、en length of 2,0 m 0,2 m and a threshold value k COREof 0,5 (IEC 60793-1-20 Method B). Table 2 Dimensional requirements common to all category A2 fibres Attribute Unit Limit Core non-circularity % 4 Coating diameter m a Fibre length km b aThe diameter of the coating is dependent on the cable structu
48、re and applications. bLength requirements vary and should be agreed between supplier and customer. 8 IEC 60793-2-20:2015 IEC 2015 Table 3 Additional dimensional attributes required for each sub-category Attribute Cladding diameter Core diameter 3.3 Mechanical requirements Relevant mechanical attribu
49、tes and test methods are indicated in Table 4. Mechanical requirements common to all sub-categories are given in Table 5. Table 4 Relevant mechanical attributes and test methods Attribute Test method Tensile strength IEC 60793-1-31 (0,5 m specimen length) Strain rate 3 %/min to 5 %/min Proof test IEC 60793-1-30 Table 5 Mechanical requirements common to all category A2 fibres Attribute
