EN 61300-3-4-2013 en Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-4 Examinations and measurements - Attenuation.pdf

1、BSI Standards PublicationFibre optic interconnecting devices and passive components Basic test and measurement proceduresPart 3-4: Examinations and measurements AttenuationBS EN 61300-3-4:2013National forewordThis British Standard is the UK implementation of EN 61300-3-4:2013. It isidentical to IEC

2、61300-3-4:2012. It supersedes BS EN 61300-3-4:2001 whichis withdrawn.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre opticinterconnecting devices and passive components.A list of organizations represented on this commi

3、ttee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2013Published by BSI Standards Limited 2013ISBN 978 0 580 60714 1ICS 33.180.20;

4、 33.180.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61300-3-

5、4:2013EUROPEAN STANDARD EN 61300-3-4 NORME EUROPENNE EUROPISCHE NORM June 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013

6、CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-4:2013 E ICS 33.180.20 Supersedes EN 61300-3-4:2001 English version Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part

7、3-4: Examinations and measurements - Attenuation (IEC 61300-3-4:2012) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures - Partie 3-4: Examens et mesures - Affaiblissement (CEI 61300-3-4:2012) Lichtwellenleiter - Verbindungselemente und pa

8、ssive Bauteile - Grundlegende Prf- und Messverfahren - Teil 3-4: Untersuchungen und Messungen - Dmpfung (IEC 61300-3-4:2012) This European Standard was approved by CENELEC on 2013-01-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for

9、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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in th

10、ree 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national ele

11、ctrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, R

12、omania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 61300-3-4:2013EN 61300-3-4:2013 - 2 - Foreword The text of document 86B/3494/FDIS, future edition 3 of IEC 61300-3-4, prepared by IEC/SC 86B “Fibre optic interconnecting devices and passive components“, of I

13、EC TC 86, “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61300-3-4:2013. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013

14、-12-28 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2014-01-16 This document supersedes EN 61300-3-4:2001. EN 61300-3-4:2013 includes the following significant technical changes with respect to EN 61300-3-4:2001: a) revision of source condition

15、s, launch conditions and power meter parameters; b) addition of safety recommendations; c) removal of launch condition details for multimode fibres, now referenced in EN 61300-1. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN

16、ELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61300-3-4:2012 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following

17、notes have to be added for the standards indicated: IEC 61300-3-29 NOTE Harmonized as EN 61300-3-29. IEC 61280-1-3 NOTE Harmonized as EN 61280-1-3. BS EN 61300-3-4:2013- 3 - EN 61300-3-4:2013 Annex ZA (normative) Normative references to international publications with their corresponding European pu

18、blications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appli

19、es. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60793-2 - Optical fibres - Part 2: Product specifications - General EN 60793-2 - IEC 60825-1 - Safety of laser products - Part 1

20、: Equipment classification and requirements EN 60825-1 - IEC 61300-1 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 1: General and guidance EN 61300-1 - IEC 61300-3-1 - Fibre optic interconnecting devices and passive components - Basic tes

21、t and measurement procedures - Part 3-1: Examinations and measurements - Visual examination EN 61300-3-1 - 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 s

22、ingle-mode fibre optic device EN 61300-3-2 - IEC/TR 62316 - Guidance for the interpretation of OTDR backscattering traces - - BS EN 61300-3-4:2013 2 61300-3-4 IEC:2012 CONTENTS 1 Scope . 5 2 Normative references . 5 3 General description 5 3.1 General . 5 3.2 Precautions . 6 4 Apparatus . 6 4.1 Laun

23、ch 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 Reference 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 wi

24、th 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 (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

25、.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 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

26、 (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 DUT 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

27、 1 Preferred source conditions . 6 Table 2 Preferred power meter parameters 7 Table 3 DUT configurations 8 BS EN 61300-3-4:201361300-3-4 IEC:2012 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-4: Examinations and measurements Attenuation 1 S

28、cope This part of IEC 61300 describes the various methods available to measure the attenuation 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, i

29、n whole or in part, are normatively referenced in this document and are indispensable for its 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

30、2: Product specifications General IEC 60825-1, Safety of laser products Part 1: Equipment classification 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 interco

31、nnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations 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 Polarizatio

32、n dependent loss in a single-mode fibre optic device IEC/TR 62316, Guidance for the interpretation 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

33、 under test (DUT), within a length of optical fibre cable. The term insertion loss is sometimes 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

34、two ports. Eight different DUT configurations are described. The differences between these configurations 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 optic

35、al power meter. Optical time domain reflectometry (OTDR) measurements are presented as an alternative method. Three variations in the measurement of attenuation with a power meter are presented. The reference BS EN 61300-3-4:2013 6 61300-3-4 IEC:2012 and alternative methods to be used for each DUT c

36、onfiguration are defined in Table 3. Different test configurations and methods will result in different accuracies 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

37、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 multimode measurements, a change in modal distribution in the measurement system due to fibre disturbance, will affect the

38、attenuation measurement. Components with polarization dependent loss will show different attenuation depending on the input state of polarization from the source. If the component PDL can exceed the acceptable uncertainty in the attenuation measurement, then either an unpolarized or polarization scr

39、ambled source can be used to measure the polarization averaged attenuation or the methods of IEC 61300-3-2 should be used to measure PDL and attenuation together. The safety recommendations in IEC 60825-1, Safety of laser products, should be followed. 4 Apparatus 4.1 Launch conditions and source (S)

40、 Table 1 Preferred source conditions No. Type Central wavelength nm Spectral width nm Source type S1 Multi-mode 660 30 30 Monochromator or LED S2 Multi-mode 780 30 30 Monochromator or LED S3 Multi-mode 850 30 30 Monochromator or LED S4 Multi-mode 1 300 30 30 Monochromator or LED S5 Single-mode 1 310

41、 30 To be reported Laser diode monochromator or LED S6 Single-mode 1 550 30 To be reported Laser diode monochromator or LED S7 Single-mode 1 625 30 To be reported Laser diode monochromator or LED NOTE 1 It is recognized that some components, e.g. for CWDM, may require the use of other source types s

42、uch as tunable lasers. It is therefore recommended in these cases that the preferred source characteristics are specified on the basis of the component to be measured. NOTE 2 Central wavelength and spectral width are defined in IEC 61280-1-3. The launch condition shall be specified in accordance wit

43、h Clause 9 of IEC 61300-1:2011. The source unit consists of an optical emitter, the associated drive electronics and fibre pigtail (if any). Preferred source conditions are given in Table 1. The stability of the single-mode fibre source at 23 C shall be 0,01 dB over the duration of the measurement.

44、The stability of the multimode fibre source at 23 C shall be 0,05 dB over the duration of the measurement. The source output power shall be 20 dB above the minimum measurable power level. BS EN 61300-3-4:201361300-3-4 IEC:2012 7 4.2 Optical power meter (D) The power meter unit consists of an optical

45、 detector, the mechanism for connecting to it and associated detection electronics. The connection to the detector will either be with an adaptor that accepts a bare fibre or a connector plug of the appropriate design. The measurement system shall be stable within specified limits over the period of

46、 time required to measure P0and P1. For measurements where the connection to the detector must be broken between the measurement of P0and P1, the measurement repeatability shall be within 0,02 dB. A detector with a large sensitive area may be used to achieve this. The precise characteristics of the

47、detector shall be compatible with the measurement requirements. The dynamic range of the power meter shall be capable of measuring the power level exiting from the DUT at the wavelength being measured. The preferred power meter parameters are given below in Table 2. The power meter shall be calibrat

48、ed for the operational wavelength and power level. The power meter stability should be 0,01 dB over the measurement time and operational temperature range. The stability and validity of dark current corrections from zeroing calibration can influence this. Table 2 Preferred power meter parameters Num

49、ber Type Maximum nonlinearity dB Relative uncertainty dB D1 Multi-mode 0,05 (-60 dBm DZatt), then the attenuation for each event, a and b, will be displayed separately. Where LX DZatt, the OTDR will be unable to distinguish between events a and b and the DUT will be shown as one attenuation event. Where the DUT is terminated with either a connector plug or a receptacle, reference plugs and adaptors are added, as necessary, to fo