IEC 60793-1-41-2010 Optical fibres - Part 1-41 Measurement methods and test procedures - Bandwidth《光纤.第1-41部分 测量方法和试验规程.频带宽度》.pdf

《IEC 60793-1-41-2010 Optical fibres - Part 1-41 Measurement methods and test procedures - Bandwidth《光纤.第1-41部分 测量方法和试验规程.频带宽度》.pdf》由会员分享，可在线阅读，更多相关《IEC 60793-1-41-2010 Optical fibres - Part 1-41 Measurement methods and test procedures - Bandwidth《光纤.第1-41部分 测量方法和试验规程.频带宽度》.pdf（64页珍藏版）》请在麦多课文档分享上搜索。

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

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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

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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