BS-EN-60793-1-41-2003.pdf
BRITISH STANDARD AEROSPACE SERIES BS EN 60793-1-41: 2003 Optical fibres Part 1-41: Measurement methods and test procedures Bandwidth The European Standard EN 60793-1-41:2003 has the status of a British Standard ICS 33.180.10 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60793-1-41:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 January 2004 © BSI 15 January 2004 ISBN 0 580 43255 6 National foreword This British Standard is the official English language version of EN 60793-1-41:2003. It is identical with IEC 60793-1-41:2003. It supersedes BS EN 60793-1-41:2002 which is withdrawn.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 responsibility 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 “International 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 British 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 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, pages 2 to 27 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60793-1-41 NORME EUROPÉENNE EUROPÄISCHE NORM December 2003 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für 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 for CENELEC members. Ref. No. EN 60793-1-41:2003 E ICS 33.180.10 Supersedes EN 60793-1-41:2002 English version Optical fibres Part 1-41: Measurement methods and test procedures Bandwidth (IEC 60793-1-41:2003) Fibres optiques Partie 1-41: Méthodes de mesure et procédures d'essai Largeur de bande (CEI 60793-1-41:2003) Lichtwellenleiter Teil 1-41: Messmethoden und Prüfverfahren Bandbreite (IEC 60793-1-41:2003) 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 this 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 versions (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 Austria, 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 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60793-1-41:2003 - 2 - Foreword The text of document 86A/841/FDIS, future edition 2 of IEC 60793-1-41, 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 60793-1-41 on 2003-11-01. This European Standard supersedes EN 60793-1-41:2002. It updates and completes the 2002 edition in particular by the restricted mode launch intended for the laser launch transmission system. This 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 national 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 A, B, C and ZA are normative and annexes D and E are informative. Annex 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 procedures 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 Monitoring 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 text of the International Standard IEC 60793-1-41:2003 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60793-1-40 NOTE Harmonized as EN 60793-1-40:2003 (modified). _ Page 2 EN 60793141:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60793-1-41 IEC:2003 3 CONTENTS FOREWORD 2 1 Scope 4 2 Normative references. 4 3 Definition 5 4 Apparatus . 5 4.1 Radiation source 5 4.2 Launch system. 6 4.3 Detection system . 7 4.4 Recording system 8 4.5 Computational equipment. 8 4.6 Overall system performance. 8 5 Sampling and specimens 8 5.1 Test sample. 8 5.2 Reference sample 9 5.3 End preparation . 9 5.4 Test sample packaging 9 5.5 Test sample positioning . 9 6 Procedure. 9 6.1Method A Pulse distortion method (optical time domain) input pulse measurement. 9 6.2 Method B Frequency domain measurement method.10 7 Calculations or interpretation of results11 7.1 3 dB frequency, f3 dB.11 7.2 Calculations for optional reporting methods11 8 Length normalization.11 9 Results .11 9.1 Information to be provided with each measurement 11 9.2 Informations available upon request .12 10 Specification information .12 Annex A (normative) Intramodal dispersion factor and the normalized intermodal dispersion limit 13 Annex B (normative) Fibre transfer function, H(f) 17 Annex C (normative) Calculations for other reporting methods 18 Annex D (informative) Comparison between this test method and ITU requirements19 Annex E (informative) Mode scrambler requirements for overfilled launching conditions to multimode fibres20 cor35. Page 3 EN 60793141:2003 -39706-114 3002:CEI 3 TNOCENTS FOERWORD 2 1 Scepo 9 2Nromavite refercnese. 9 3Dfenoitini 11 4Arappsuta .11 1.4Rs noitaidaruoce11 2.4cnuaLs hysmet31. 3.4Dcetes noitysmet 51. 4.4Rceros gnidysmet 71 5.4Cmompiuqe lanoitatuptne71. 6.4Overas llysmet repformcnae71. 5Smas dna gnilpcepmisne 71 1.5Tses tampel71. 2.5Rferecnes eampel91 3.5Erp dnrapenoita 91. 4.5Tses tampcap elkgniga 91 5.5 Tses tampsop elgninoiti 91. 6 Procrudee.91 1.6MsluP A dohtesid etrom noite( dohtcitpomit lae mod)nia slup tupnie msaerumetne91. 2.6F B dohteMrcneuqey modm niasaerumem tnedohte12. 7Cclausnoital ro retniprefo noitat resustl32 1.7f Bd 3rcneuqey, fBd 332. 2.7Cclasnoitalu fro r lanoitporopem gnitsdohte32 8ron htgneLmazilnoita32. 9Rsestlu .32 1.9 fnIromrp eb ot noitavow dediicae htm hsaerumetne 32 2.9fnIromsnoita r nopu elbaliavaseuqet 52. 01cepSficifni noitaormnoita 52. xennA ( Aronm)evita rtnImasid ladorepsif nocatro ron eht dnamzilaretni demlado sidrepsimil noti .72. xennA ( Bronm)evita Firbrt esnafre fcnu,noit H()f 53 xennA ( Cronm)evita claCsnoitalu fro rehto rropem gnitsdohte 73 xennA ( Difnrom)evita moCrapsiwteb nosiht nee sett mTI dna dohter Uriuqemestne93 xennA ( Eifnroma)evit s edoMcrmarelb rriuqeemstne for revofcnual dellic gnihsnoitidno m otumitlf edoirbse14 Bibliography 27 3 egaP 3002:14139706 NE -39706-114 3002:CEI 3 TNOCENTS FOERWORD 2 1 Scepo 4 2 Normaitve referneces. 4 3 Defnoitini 5 4 Aapprsuta . 5 1.4 Rnoitaida suorce 5 2.4 nuaLch sysetm. 6 3.4 Detecnoit sysmet . 7 4.4 Recorgnid sysmet 8 5.4 Compiuqe lanoitatupmnet. 8 6.4 Overall sysmet eprformnace. 8 5 Samdna gnilp sepcimsne 8 1.5 Test sample. 8 2.5 Refernece sample 9 3.5 Ep dnrapernoita . 9 4.5 Test sampap elckgniga 9 5.5 Test sampop elsgninoiti . 9 6 Procudere. 9 1.6MsluP A dohtesid etrom noite( dohtcitpomit lae mod)nia slup tupnie maesuremnet. 9 2.6 B dohteM Frneuqecy odmnia maesuremtne mohted.01 7 Clacusnoital ro etnirprefo noitat resutls11 1.7 Bd 3 frneuqecy, fd 3B.11 2.7 Clacsnoitalu fro lanoitpo ropergnit mdohtes11 8 on htgneLrmailzoitan.11 9 Resstlu .11 1.9 nIformp eb ot noitarovdedi wiae htch maesuremtne 11 2.9 nIformsnoita nopu elbaliava reuqest .21 01 epScificni noitaformnoita .21 xennA A (onrm)evita tnIramid ladoseprsino factro on eht dnarmilazetni dermlado idseprsiil nomti 31 xennA B (onrm)evita Fibrt ernasfre fnuc,noit H()f 71 xennA C (onrm)evita laCcsnoitalu fro rehto ropergnit msdohte 81 xennA D (inform)evita oCmapristeb nowsiht nee etst mI dna dohteTU riuqeremtnes19 Annex ZA (normative) Normative references to international publications with their corresponding European publications26 ibliogrBaphy 53 3 egaP 3002:14139706 NE 60793-1-41 IEC:2003 3 CONTENTS FOREWORD 2 1 Scope 9 2Normative references. 9 3Definition 11 4Apparatus .11 4.1Radiation source11 4.2Launch system.13 4.3Detection system .15 4.4Recording system 17 4.5Computational equipment.17 4.6Overall system performance.17 5Sampling and specimens 17 5.1Test sample.17 5.2Reference sample19 5.3End preparation .19 5.4Test sample packaging 19 5.5 Tses tampe poslitioning .19 6 Procduree.19 6.1Method A Pulse distortion method (optical time domain) input pulse measurement.19 6.2Method B Frequency domain measurement method.21 7Calculations or interpretation of results23 7.13 dB frequency, f3 dB.23 7.2Calculations for optional reporting methods23 8Length normalization.23 9Results .23 9.1 nfIromtion to be pravoded wiih eactm haserumeent 23 9.2Informations available upon request .25 10Specification information .25 Annex A (normative) Intramodal dispersion factor and the normalized intermodal dispersion limit 27 xennA ( Bronm)evita Firbrt esnafre fcnu,noit H()f 53 xennA ( Cronm)evita claCsnoitalu fro rehto rropem gnitsdohte 736. xennA ( Difnrom)evita moCrapsiwteb nosiht nee sett mTI dna dohter Uriuqemestne93 Annex E (informative) Mode scrambler requirements for overfilled launching conditions to multimode fibres41 goilbiBryhpa 72 Page 3 EN 60793141:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60793-1-41 IEC:2003 9 OPTICAL FIBRES Part 1-41: Measurement methods and test procedures Bandwidth 1 Scope This part of IEC 60793 describes two methods for determining and measuring the modal bandwidth of multi-mode optical fibres (see IEC 60793-2-10, IEC 60793-2-30 and IEC 60793-2-40). The baseband frequency response is directly measured in the frequency domain by determining the fibre response to a sinusoidally modulated light source. The baseband response can also be measured by observing the broadening of a narrow pulse of light. The two methods are the following: Method A Optical time domain measurement method (pulse distortion) Method B Frequency domain measurement method Each method can be performed using one of two launches: an overfilled launch (OFL) condition or a restricted mode launch (RML) condition. NOTE These test methods are commonly used in production and research facilities and are not easily accomplished in the field. 2 Normative references The following referenced 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 60793-1-20:2001, Optical Fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-42:2001, Optical fibres Part 1-42: Measurement methods and test procedures Chromatic dispersion IEC 60793-1-43:2001, Optical fibres Part 1-43: Measurement methods and test procedures Numerical aperture IEC 60793-2-10:2001, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-230:2002, Optical fibres Part 2-30: Product specifications Sectional specification for category A3 multimode fibres IEC 60793-2-40:2002, Optical fibres Part 2-40: Product specifications Sectional specification for category A4 multimode fibres Page 4 EN 60793141:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:29:26 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60793-1-41 IEC:2003 11 3 Definition For the purposes of this part of IEC 60793, the following definition applies. bandwidth (3 dB) the value numerically equal to the lowest modulation frequency at which the magnitude of the baseband transfer function of an optical fibre decreases to a specified fraction, generally to one half, of the zero frequency value. NOTE Various methods of reporting the results are described in the annexes, but the results shall be expressed in terms of the 3 dB (optical power) frequency unless otherwise specified by the detail specification. 4 Apparatus 4.1 Radiation source 4.1.1 Optical time domain measurement method (pulse distortion measurement) (Method A) Use a radiation source such as an injection laser diode that produces short duration, narrow spectral width pulses for the purpose
