1、 IEC 60793-1-41Edition 3.0 2010-08INTERNATIONAL STANDARD NORME INTERNATIONALEOptical fibres Part 1-41: Measurement methods and test procedures Bandwidth Fibres optiques Partie 1-41: Mthodes de mesure et procdures dessai Largeur de bande IEC60793-1-41:2010 colourinsideTHIS PUBLICATION IS COPYRIGHT PR
2、OTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC
3、s member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reprodu
4、ction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de la CEI ou du Comit national de la CEI du pays du d
5、emandeur. Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coordonnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzer
6、land Email: inmailiec.ch Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of I
7、EC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference
8、 number, text, technical committee,). It also gives information on projects, withdrawn and replaced publications. IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-line and
9、also by email. Electropedia: www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabular
10、y online. Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 A propos de la CEI La Commiss
11、ion Electrotechnique Internationale (CEI) est la premire organisation mondiale qui labore et publie des normes internationales pour tout ce qui a trait llectricit, llectronique et aux technologies apparentes. A propos des publications CEI Le contenu technique des publications de la CEI est constamme
12、nt revu. Veuillez vous assurer que vous possdez ldition la plus rcente, un corrigendum ou amendement peut avoir t publi. Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm Le Catalogue en-ligne de la CEI vous permet deffectuer des recherches en utilisant diffrents critres (numr
13、o de rfrence, texte, comit dtudes,). Il donne aussi des informations sur les projets et les publications retires ou remplaces. Just Published CEI: www.iec.ch/online_news/justpub Restez inform sur les nouvelles publications de la CEI. Just Published dtaille deux fois par mois les nouvelles publicatio
14、ns parues. Disponible en-ligne et aussi par email. Electropedia: www.electropedia.org Le premier dictionnaire en ligne au monde de termes lectroniques et lectriques. Il contient plus de 20 000 termes et dfinitions en anglais et en franais, ainsi que les termes quivalents dans les langues additionnel
15、les. Egalement appel Vocabulaire Electrotechnique International en ligne. Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: cs
16、ciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60793-1-41Edition 3.0 2010-08INTERNATIONAL STANDARD NORME INTERNATIONALEOptical fibres Part 1-41: Measurement methods and test procedures Bandwidth Fibres optiques Partie 1-41: Mthodes de mesure et procdures dessai Largeur de bande INTERNATIONA
17、L ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE UICS 33.180.10 PRICE CODECODE PRIXISBN 978-2-88912-170-0 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colourinside 2 60793-1-41 IEC:2010 CON
18、TENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Apparatus.7 4.1 Radiation source .7 4.1.1 Method A Time domain (pulse distortion) measurement7 4.1.2 Method B Frequency domain measurement 8 4.1.3 Method C Overfilled launch modal bandwidth calculated from differential
19、 mode delay (OMBc) .8 4.1.4 For methods A and B.8 4.2 Launch system 8 4.2.1 Overfilled launch (OFL) .8 4.2.2 Restricted mode launch (RML) 9 4.2.3 Differential mode delay (DMD) launch .10 4.3 Detection system.10 4.4 Recording system10 4.5 Computational equipment11 4.6 Overall system performance 11 5
20、Sampling and specimens11 5.1 Test sample 11 5.2 Reference sample .11 5.3 End face preparation .11 5.4 Test sample packaging12 5.5 Test sample positioning.12 6 Procedure 12 6.1 Method A Time domain (pulse distortion) measurement12 6.1.1 Output pulse measurement12 6.1.2 Input pulse measurement method
21、A-1: reference sample from test sample 12 6.1.3 Input pulse measurement method A-2: periodic reference sample .12 6.2 Method B Frequency domain measurement 13 6.2.1 Output frequency response13 6.2.2 Method B-1: Reference length from test specimen.13 6.2.3 Method B-2: Reference length from similar fi
22、bre 13 6.3 Method C Overfilled launch modal bandwidth calculated from differential mode delay (OMBc).13 7 Calculations or interpretation of results 14 7.1 -3 dB frequency, f3 dB.14 7.2 Calculations for optional reporting methods.15 8 Length normalization 15 9 Results.15 9.1 Information to be provide
23、d with each measurement .15 9.2 Information available upon request15 10 Specification information 16 Annex A (normative) Intramodal dispersion factor and the normalized intermodal dispersion limit17 60793-1-41 IEC:2010 3 Annex B (normative) Fibre transfer function, H(f), power spectrum, |H(f)|, and
24、f3 dB20 Annex C (normative) Calculations for other reporting methods.22 Annex D (normative) Mode scrambler requirements for overfilled launching conditions to multimode fibres .23 Bibliography28 Figure 1 Mandrel wrapped mode filter 10 Figure D.1 Two examples of optical fibre scramblers .24 Table 1 D
25、MD weights for calculating overfilled modal bandwidth (OMBc) from DMD data for 850 nm only .14 Table A.1 Highest expected dispersion for commercially available A1 fibres 17 4 60793-1-41 IEC:2010 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-41: Measurement methods and test proced
26、ures Bandwidth 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 concerning standar
27、dization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation
28、 is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with th
29、e International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects
30、 since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical con
31、tent of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possi
32、ble in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformi
33、ty assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its director
34、s, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising ou
35、t 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 indispensable for the correct application of this publication. 9) Attention is drawn
36、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 60793-1-41 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
37、committee 86: Fibre optics. This third edition cancels and replaces the second edition published in 2003. This edition constitutes a technical revision. The main change with respect to the previous edition is the addition of a third method for determining modal bandwidth based on DMD data and to imp
38、rove measurement procedures for A4 fibres. This standard should be read in conjunction with IEC 60793-1-1 and IEC 60793-1-2, which cover generic specifications. 60793-1-41 IEC:2010 5 The text of this standard is based on the following documents: FDIS Report on voting 86A/1294/CDV 86A/1329/RVD Full i
39、nformation 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 of the IEC 60793-1-4x series, published under the general title Optic
40、al fibres measurement methods and test procedures, 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
41、n. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 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 correct understanding of its contents. Users
42、 should therefore print this document using a colour printer. 6 60793-1-41 IEC:2010 OPTICAL FIBRES Part 1-41: Measurement methods and test procedures Bandwidth 1 Scope This part of IEC 60793 describes three methods for determining and measuring the modal bandwidth of multimode optical fibres (see IE
43、C 60793-2-10, IEC 60793-30 series and IEC 60793-40 series). The baseband frequency response is directly measured in the frequency domain by determining the fibre response to a sinusoidaly modulated light source. The baseband response can also be measured by observing the broadening of a narrow pulse
44、 of light. The calculated response is determined using differential mode delay (DMD) data. The three methods are: Method A Time domain (pulse distortion) measurement Method B Frequency-domain measurement Method C Overfilled launch modal bandwidth calculated from differential mode delay (OMBc) Method
45、s A and B can be performed using one of two launches: an overfilled launch (OFL) condition or a restricted mode launch (RML) condition. Method C is only defined for A1a.2 (and A1a.3 in preparation) multimode fibre and uses a weighted summation of DMD launch responses with the weights corresponding t
46、o an overfilled launch condition. The relevant test method and launch condition should be chosen according to the type of fibre. NOTE 1 These test methods are commonly used in production and research facilities and are not easily accomplished in the field. NOTE 2 OFL has been used for the modal band
47、width value for LED-based applications for many years. However, no single launch condition is representative of the laser (e.g. VCSEL) sources that are used for gigabit and higher rate transmission. This fact drove the development of IEC 60793-1-49 for determining the effective modal bandwidth of la
48、ser optimized 50 m fibres. See IEC 60793-2-10:2004 or later and IEC 61280-4-1:2003 or later for more information. 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 refere
49、nces, the latest edition of the referenced document (including any amendments) applies. IEC 60793-1-20, Optical Fibres Part 1-20: Measurement methods and test procedures Fibre geometry IEC 60793-1-42, Optical fibres Part 1-42: Measurement methods and test procedures Chromatic dispersion IEC 60793-1-43, Optical fibres Part 1-43: Measurement methods and test procedures Nu
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1