1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsFibre optic interconnectingdevices and passive components Basic test and measurement procedures Part 3-6: Examinations and measurements Return lossBS EN 61300-3-6:2009National forewo
2、rdThis British Standard is the UK implementation of EN 61300-3-6:2009. It isidentical to IEC 61300-3-6:2008. It supersedes BS EN 61300-3-6:2003 which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic i
3、nterconnectingdevices and passive components.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009 ISBN 978 0
4、 580 60773 8 ICS 33.180.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October2009Amendments issued since publicationAmd. No. Date Text affectedBRITISH STA
5、NDARDBS EN 61300-3-6:2009EUROPEAN STANDARD EN 61300-3-6 NORME EUROPENNE EUROPISCHE NORM March 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B
6、 - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-6:2009 E ICS 33.180.20 Supersedes EN 61300-3-6:2003English version Fibre optic interconnecting devices and passive components - Basic test and measureme
7、nt procedures - Part 3-6: Examinations and measurements - Return loss (IEC 61300-3-6:2008) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures - Partie 3-6: Examens et mesures - Affaiblissement de rflexion (CEI 61300-3-6:2008) Lichtwellenle
8、iter -Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 3-6: Untersuchungen und Messungen -Rckflussdmpfung (IEC 61300-3-6:2008) This European Standard was approved by CENELEC on 2009-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulati
9、ons 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 E
10、uropean 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 a
11、re the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
12、pain, Sweden, Switzerland and the United Kingdom. BS EN 61300-3-6:2009EN 61300-3-6:2009 2 Foreword The text of document 86B/2762/FDIS, future edition 3 of IEC 61300-3-6, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the I
13、EC-CENELEC parallel vote and was approved by CENELEC as EN 61300-3-6 on 2009-03-01. This European Standard supersedes EN 61300-3-6:2003. The changes with respect to EN 61300-3-6:2003 are to reconsider the constitution of this standard and launch conditions for multimode fibres. The following dates w
14、ere 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) 2009-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-03-01 Annex ZA has been added by CENE
15、LEC. _ Endorsement notice The text of the International Standard IEC 61300-3-6:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 61300-3-6:2009 3 EN 61300-3-6:2009 Annex ZA (normative) Normative references to international publications with their corresponding Eur
16、opean publications 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. NOTE When an international pub
17、lication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60793-2 Series Optical fibres - Part 2: Product specifications EN 60793-2 Series IEC 61300-1 - 1)Fibre optic interconnecting devices and passive components - Basi
18、c test and measurement procedures - Part 1: General and guidance EN 61300-1 2003 2)IEC 61300-3-1 - 1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-1: Examinations and measurements - Visual examination EN 61300-3-1 2005 2)IEC 61300-3-39 -
19、1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-39: Examinations and measurements - PC optical connector reference plug selectionEN 61300-3-39 1997 2)1)Undated reference. 2) Valid edition at date of issue. BS EN 61300-3-6:2009 2 61300-3-6
20、 IEC:2008 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references7 3 General description.7 3.1 Method 1 .8 3.2 Method 2 .8 3.3 Method 3 .8 3.4 Method 4 .8 3.5 Selection of reference measurement method .8 4 Apparatus and symbols.9 4.1 Device under test (DUT) 9 4.2 Method 1: measurements with OCWR9 4.2.1
21、 Branching device (BD) .10 4.2.2 Detector (D1, D2and D3) 10 4.2.3 Source (S1 and S2) 10 4.2.4 Temporary joint (TJ) 10 4.2.5 Termination (T)10 4.3 Method 2: measurements with OTDR.11 4.3.1 Optical time domain reflectometer (OTDR).11 4.3.2 Fibre sections (L1, L2, and L3)11 4.3.3 Temporary joints (TJ).
22、11 4.4 Method 3: measurements with OLCR .11 4.4.1 Light source (S) .12 4.4.2 Branching device (BD) .12 4.4.3 Optical delay line (ODL) .12 4.4.4 Optical detector (D)12 4.4.5 Temporary joint (TJ) 12 4.4.6 Data processing unit 12 4.5 Method 4: measurements with an OFDR 13 4.5.1 RF network analyser 13 4
23、.5.2 Optical heads Source (S) and receiver (D) 13 4.5.3 Optical variable attenuator (A) (optional) 13 4.5.4 Optical amplifier (OA) (optional) .13 4.5.5 Isolator (I) (optional) 14 4.5.6 Branching device (BD) .14 4.5.7 Temporary joint (TJ) 14 4.5.8 Computer.14 5 Procedure.14 5.1 Launch conditions14 5.
24、2 Pre-conditioning 14 5.3 DUT output port.14 5.4 Method 1: measurement with OCWR .14 5.4.1 Definition of the OCWR measurement14 5.4.2 Set-up characterization 15 5.4.3 Measurement procedure 17 BS EN 61300-3-6:200961300-3-6 IEC:2008 3 5.4.4 Accuracy considerations 18 5.5 Method 2: measurement with OTD
25、R.18 5.5.1 Definition of the OTDR measurement.18 5.5.2 Evaluation of backscattering coefficient19 5.5.3 Measurement procedure 20 5.5.4 Accuracy considerations 21 5.6 Method 3: measurement with OLCR.21 5.6.1 Calibration procedure.21 5.6.2 Measurement procedure 21 5.6.3 Accuracy considerations 22 5.7
26、Method 4: measurements with OFDR.22 5.7.1 Calibration procedure.22 5.7.2 Measurement procedure 22 5.7.3 Accuracy considerations 22 6 Details to be specified.23 6.1 Return loss measurement with OCWR .23 6.1.1 Reference components 23 6.1.2 Branching device .23 6.1.3 Detector.23 6.1.4 Source.24 6.1.5 T
27、emporary joint24 6.1.6 Termination .24 6.2 Return loss measurement with OTDR 24 6.2.1 Reference components 24 6.2.2 OTDR24 6.2.3 L1, L2, and L3.24 6.2.4 Fibre24 6.3 Return loss measurement with OLCR.24 6.3.1 Reference components 24 6.3.2 Source.25 6.3.3 Branching device (BD) .25 6.4 Return loss meas
28、urement with OFDR 25 6.4.1 Reference components 25 6.4.2 Vector network analyser.25 6.4.3 Branching device .25 6.4.4 Source.25 6.4.5 Detector.25 6.4.6 Optical amplifier (optional) .26 6.4.7 Isolator (optional).26 6.4.8 Calibration .26 6.5 Measurement procedure 26 Annex A (informative) Comparison of
29、return loss detectable by four different methods .27 Figure 1 Measurement set-up of return loss OCWR method9 Figure 2 Measurement set-up of return loss with OTDR method11 Figure 3 Measurement set-up of return loss with OLCR method12 Figure 4 Measurement set-up of return loss with OFDR method13 Figur
30、e 5 Measurement set-up of the system reflected power.15 BS EN 61300-3-6:2009 4 61300-3-6 IEC:2008 Figure 6 Measurement set-up of the branching device transfer coefficient.16 Figure 7 Measurement set-up of the splitting ratio of the branching device 16 Figure 8 Measurement set-up of return loss with
31、an OCWR 17 Figure 9 Typical OTDR trace of the response to a reflection19 Figure A.1 Comparison of detectable return loss, resolution and measurable distance for four return loss measurement methods 27 Table 1 OTDR parameters for some pulse duration 20 Table 2 Example of system data and relevant dyna
32、mic range23 BS EN 61300-3-6:200961300-3-6 IEC:2008 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-6: Examinations and measurements Return loss FOREWORD 1) The International Electrotechnical Commiss
33、ion (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 standardization in the electrical and electronic fields. To this end and in
34、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 is entrusted to technical committees; any IEC National Committee int
35、erested 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 the International Organization for Standardization (ISO) in accordance
36、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 since each technical committee has representation from all intereste
37、d 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 content of IEC Publications is accurate, IEC cannot be held responsible
38、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 possible in their national and regional publications. Any divergence betwe
39、en any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All user
40、s should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or othe
41、r damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out 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. U
42、se of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn 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
43、 rights. International Standard IEC 61300-3-6 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. This third edition cancels and replaces the second edition published in 2003. It constitutes a technical revis
44、ion. The changes with respect to the previous edition are to reconsider the constitution of the document and launch conditions for multimode fibres. BS EN 61300-3-6:2009 6 61300-3-6 IEC:2008 The text of this standard is based on the following documents: FDIS Report on voting 86B/2762/FDIS 86B/2792/R
45、VD Full information 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 IEC 61300 series, published under the general title, Fibr
46、e optic interconnecting devices and passive components Basic test and measurement procedures can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.ie
47、c.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. BS EN 61300-3-6:200961300-3-6 IEC:2008 7 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Pa
48、rt 3-6: Examinations and measurements Return loss 1 Scope This part of IEC 61300 presents procedures for the measurement of the return loss (RL) of a fibre optic device under test (DUT). 2 Normative references The following referenced documents are indispensable for the application of this document.
49、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-2 (all parts), Optical fibres Product specifications IEC 61300-1, Fibre optic interconnecting devices and passive components Basic test and
