1、 IEC 61300-3-4 Edition 3.0 2012-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation Dispositifs dinterconnexion et composants passifs fibres optiques Mthode
2、s fondamentales dessais et de mesures Partie 3-4: Examens et mesures Affaiblissement IEC61300-3-4:2012 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any for
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16、 avez des questions contactez-nous: csciec.ch. IEC 61300-3-4 Edition 3.0 2012-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation Dispositifs dinterconnexio
17、n et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 3-4: Examens et mesures Affaiblissement INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE Q ICS 33.180.20 PRICE CODE CODE PRIX ISBN 978-2-83220-491-7 Registered trademark of
18、the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61300-3
19、-4 IEC:2012 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 General description 5 3.1 General . 5 3.2 Precautions . 6 4 Apparatus . 6 4.1 Launch conditions and source (S) . 6 4.2 Optical power meter (D) 7 4.3 Temporary joint (TJ) 7 4.4 Fibre . 7 4.5 Reference plugs (RP) 8 4.6 Referenc
20、e adaptors (RA) . 8 5 Procedure. 8 5.1 Pre-conditioning 8 5.2 Visual inspection . 8 5.3 DUT configurations and test methods 8 5.4 Attenuation measurements with a power meter 9 5.4.1 General . 9 5.4.2 Cutback method 9 5.4.3 Substitution method . 10 5.4.4 Insertion method (A) 11 5.4.5 Insertion method
21、 (B) with direct coupling to power meter . 11 5.4.6 Insertion method (C) with additional test patchcord 12 5.5 Attenuation measurements with an OTDR . 13 5.5.1 Measurement description . 13 5.5.2 Bidirectional measurement 14 5.5.3 Measurement method 15 5.5.4 Evaluation procedure . 15 6 Details to be
22、specified 16 Bibliography 17 Figure 1 Cutback method Type 1, Type 2 and Type 3 DUTs 10 Figure 2 Substitution method Type 4 DUT . 10 Figure 3 Insertion method (C1) Type 2 DUT 11 Figure 4 Insertion method (C2) Type 5 and Type 6 DUT 12 Figure 5 Insertion method (C3) Type 4, Type 5, Type 7 and Type 8 DU
23、T 13 Figure 6 Method 1 One launch section 14 Figure 7 Method 2 Two launch sections 14 Figure 8 Non-reflective event . 15 Figure 9 Reflective event . 16 Table 1 Preferred source conditions . 6 Table 2 Preferred power meter parameters 7 Table 3 DUT configurations 8 61300-3-4 IEC:2012 3 INTERNATIONAL E
24、LECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-4: Examinations and measurements Attenuation FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
25、 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 addition to other activities, IEC publishes International Standards,
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34、e references cited in this publication. Use 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 responsib
35、le for identifying any or all such patent rights. International Standard IEC 61300-3-4 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
36、in 2001. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision of source conditions, launch conditions and power meter parameters; b) addition of safety recommendations; c) removal of launch condition
37、details for multimode fibres, now referenced in 61300-1. 4 61300-3-4 IEC:2012 The text of this standard is based on the following documents: FDIS Report on voting 86B/3494/FDIS 86B/3541/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicate
38、d in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in IEC 61300 series, published under the general title, Fibre optic interconnecting and passive components Basic test and measurement procedures, can be found on the IEC
39、 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 publication. At this date, the publication will be reconfirmed, withdrawn, replaced
40、 by a revised edition, or amended. 61300-3-4 IEC:2012 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-4: Examinations and measurements Attenuation 1 Scope This part of IEC 61300 describes the various methods available to measure the attenuati
41、on of optical components. It is not, however, applicable to dense wavelength division multiplexing (DWDM) components, for which IEC 61300-3-29 should be used. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for it
42、s application. 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, Optical fibres Part 2: Product specifications General IEC 60825-1, Safety of laser products Part 1: Equipment cl
43、assification and requirements IEC 61300-1:2011, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 1: General and guidance IEC 61300-3-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Exam
44、inations and measurements Visual examination IEC 61300-3-2, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-2: Examinations and measurements Polarization dependent loss in a single-mode fibre optic device IEC/TR 62316, Guidance for the interpre
45、tation of OTDR backscattering traces 3 General description 3.1 General Attenuation is intended to give a value for the decrease of useful power, expressed in decibels, resulting from the insertion of a device under test (DUT), within a length of optical fibre cable. The term insertion loss is someti
46、mes used in place of attenuation. The DUT may have more than two optical ports. However, since an attenuation measurement is made across only two ports, the DUTs in this standard shall be described as having two ports. Eight different DUT configurations are described. The differences between these c
47、onfigurations are primarily in the terminations of the optical ports. Terminations may consist of bare fibre, a connector plug, or a receptacle. The reference method for measuring attenuation is with an optical power meter. Optical time domain reflectometry (OTDR) measurements are presented as an al
48、ternative method. Three variations in the measurement of attenuation with a power meter are presented. The reference 6 61300-3-4 IEC:2012 and alternative methods to be used for each DUT configuration are defined in Table 3. Different test configurations and methods will result in different accuracie
49、s of the attenuation being measured. In cases of dispute, the reference test method should be used. 3.2 Precautions The power in the fibre shall not be at a level high enough to generate non-linear scattering effects. The position of the fibres in the test should be fixed between the measurement of P0and P1to avoid changes in attenuation due to bending loss. In mu
