1、 IEC 60793-2-50 Edition 5.0 2015-11 INTER NA TIONAL STA NDA R D Opt ical fibres Part 2-50:Product specificat ions Sect ional specificat ion for class B single-mode fibres IEC 60793-2-50:2015-11(en)colourinsideInternational Electrotechnical Commission THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyrigh
2、t 2015 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no par t of this publication may be reproduced or utilized in any for m or by any means,electronic or mechanical,including photocopying and microfilm,without per mission in writing fr om either IEC or IECs member National C
3、ommittee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional r ights to this publication,please contact the address below or your local IEC member National Committee for further infor mation.IEC Centr al Office Tel.:+41 22 919 0
4、2 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About t he IEC The International Electr otechnical Commission(IEC)is the leading global organization that prepar es and publishes Inter national Standards for all electr ical,electronic and related technolo
5、gies.A bout IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sur e that you have the latest edition,a cor rigenda or an amendment might have been published.IEC Cat alogue-webstore.iec.ch/cat alogue The stand-alone application for consult
6、ing the entire bibliographical information on IEC International Standards,Technical Specifications,Technical R eports and other documents.A v ailable for PC,Mac OS,A ndroid Tablets and iPad.IEC publications search-w w w.iec.ch/searchpub The adv anced search enables to find IEC publications by a vari
7、ety of criteria(reference number,text,technical committee,).It also gives information on projec ts,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.A v ailable online
8、and also once a month by email.Elect ropedia-w w w.elect ropedia.org The worlds leading online dic tionary of elec tronic and electrical terms containing more than 30 000 terms and definitions in English and French,with equiv alent terms in 15 additional languages.Also known as the International Ele
9、c trotechnical Vocabulary (IEV)online.IEC Glossar y-st d.iec.ch/glossar y More than 60 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries hav e been collected from earlier publications of I
10、EC TC 37,77,86 and CISPR.IEC Customer Service Cent re-webstore.iec.ch/csc If y ou wish to giv e us y our feedback on this publication or need further assistance,please contact the Customer Serv ice Centre:csciec.ch.International Electrotechnical Commission IEC 60793-2-50 Edit ion 5.0 2015-11 INTER N
11、A TIONAL STA NDA R D Opt ical fibres Part 2-50:Product specificat ions Sect ional specification for class B single-mode fibres INTERNATIONA L ELECTROT ECHNICA L COMMISSION ICS 33.180.10 ISBN 978-2-8322-3023-7 R egist er ed tr ademar k of t he Int er national Electr ot echnical Commission W arning!Ma
12、ke sure that y ou obtained this publication from an authorized distributor.colourinsideInternational Electrotechnical Commission 2 IEC 60793-2-50:2015 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 Genera
13、l.9 5.2 Dimensional requirements.9 5.3 Mechanical requirements.10 5.4 Transmission requirements.11 5.5 Environmental requirements.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 cate
14、gory B1.1 single-mode fibres.15 A.1 General.15 A.2 Dimensional requirements.15 A.3 Mechanical requirements.15 A.4 Transmission 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.
15、17 B.3 Mechanical requirements.17 B.4 Transmission requirements.18 B.5 Environmental requirements.18 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 Hydro
16、gen ageing for category B1.3.20 C.6 Environmental requirements.21 Annex D(normative)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 dispersion coefficient requirement for sub-category B2_b fibres.24 D.5 Environmental requirements.24 Annex E(normative)Family spec
