BS-EN-60793-1-49-2003.pdf
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1、BRITISH STANDARD BS EN 60793-1-49: 2003 Optical fibres Part 1-49: Measurement methods and test procedures Differential mode delay The European Standard EN 60793-1-49:2003 has the status of a British Standard ICS 33.180.10 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:34:59 GMT+00:00 20
2、06, Uncontrolled Copy, (c) BSI BS EN 60793-1-49:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 December 2003 BSI 15 December 2003 ISBN 0 580 43076 6 National foreword This British Standard is the official English language version of
3、EN 60793-1-49:2003. It is identical with IEC 60793-1-49:2003. It supersedes DD IEC/PAS 60793-1-49:2002 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables, which has the responsibil
4、ity to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Inter
5、national Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Br
6、itish Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international
7、and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, the EN foreword page, pages 3 to 17, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this documen
8、t indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:34:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60793-1-49 NORME EUROPENNE EUROPISCHE NORM November 2003 CENELEC Eu
9、ropean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
10、for CENELEC members. Ref. No. EN 60793-1-49:2003 E ICS 33.180.10 English version Optical fibres Part 1-49: Measurement methods and test procedures Differential mode delay (IEC 60793-1-49:2003) Fibres optiques Partie 1-49: Mthodes de mesure et procdures dessai Retard diffrentiel de mode (CEI 60793-1-
11、49:2003) Lichtwellenleiter Teil 1-49: Messmethoden und Prfverfahren Gruppenlaufzeitdifferenz (IEC 60793-1-49:2003) This European Standard was approved by CENELEC on 2003-11-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving thi
12、s European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official version
13、s (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Au
14、stria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:34:59 GMT+00:00
15、 2006, Uncontrolled Copy, (c) BSI EN 69703-1-942:300 - - 2 Foreword The text of document 86A/842/FDIS, future edition 1 of IEC 60793-1-49, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60793-1-49 on
16、 2003-11-01. This European Standard is to be read in conjunction with EN 60793-1-1:2003. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-08-01 latest date by which the na
17、tional standards conflicting with the EN have to be withdrawn (dow) 2006-11-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annexes B and ZA are normative and annexes A and C are informative. A
18、nnex ZA has been added by CENELEC. EN 60793-1-4X consists of the following parts, under the general title: Optical fibres: - Part 1-40: Measurement methods and test procedures Attenuation - Part 1-41: Measurement methods and test procedures Bandwidth - Part 1-42: Measurement methods and test procedu
19、res Chromatic dispersion - Part 1-43: Measurement methods and test procedures Numerical aperture - Part 1-44: Measurement methods and test procedures Cut-off wavelength - Part 1-45: Measurement methods and test procedures Mode field diameter - Part 1-46: Measurement methods and test procedures Monit
20、oring of changes in optical transmittance - Part 1-47: Measurement methods and test procedures Macrobending loss - Part 1-48: Measurement methods and test procedures Polarization mode dispersion - Part 1-49: Measurement methods and test procedures Differential mode delay _ Endorsement notice The tex
21、t of the International Standard IEC 60793-1-49:2003 was approved by CENELEC as a European Standard without any modification. _ Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:34:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 067-39-149 CEI:0230 3 CONTENTS OFREWODR 5 1 Scope 4 2 Normative re
22、ferences. 4 3 Definitions . .4 4 Apparatus5 4.1 Optical source . 5 4.2 Stability . 5 4.3 Launch system 5 4.4 Detection system . 6 4.5 Computational equipment 7 5 Sampling and specimens 7 5.1 Test sample. 7 5.2 Specimen endfaces . 7 5.3 Specimen length 7 5.4 Specimen packaging 7 5.5 Specimen position
23、ing. 7 6 Procedure. 7 6.1 Adjust and measure system response 7 6.2 Adjust detection system. 8 6.3 Measure the test sample 8 7 Calculations and interpretation of results 9 7.1 Differential Mode Delay (DMD) 9 7.2 Length normalization . 9 8 Documentation 9 8.1 Report the following information for each
24、test 9 8.2 Information to be available upon request 10 9 Specification information10 Annex A (informative) Comparison between this Standard and ITU recommendations.11 Annex B (normative) Source spectral width limitation 12 Annex C (informative) Discussion of measurement details 15 Bibliography.18 Fi
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