1、 IEC 61300-3-7 Edition 2.0 2009-01 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return loss of single mode components IEC 61300-3-7:2009(E) THIS
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9、l.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 61300-3-7 Edition 2.0 2009-01 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return loss of single
10、mode components INTERNATIONAL ELECTROTECHNICAL COMMISSION U ICS 33.180.20 PRICE CODE ISBN 2-8318-1023-1 Registered trademark of the International Electrotechnical Commission 2 61300-3-7 IEC:2009(E) CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Abbreviations and acronyms.6 4 General 8 4.1
11、 General description .8 4.2 Spectral conditions9 4.3 Definition.9 4.3.1 Attenuation9 4.3.2 Return loss10 4.4 Device under test 10 4.5 Measurement methods 11 4.5.1 Method A Broadband light source (BBS).11 4.5.2 Method B Tuneable narrowband light source (TLS).12 4.5.3 Method C Set of multiple fixed na
12、rrowband light sources (NLS) 12 4.5.4 Method D Tuneable OTDR13 4.5.5 Reference method .13 5 Apparatus.13 5.1 Wavelength source13 5.1.1 Method A Broadband light source .13 5.1.2 Method B Tuneable narrowband light source 13 5.1.3 Method C Set of N narrowband light sources 14 5.1.4 Method D Tuneable OT
13、DR14 5.1.5 Depolarizer14 5.2 Detection system.15 5.2.1 Method A, Method B.2 and Method C.2 tuneable narrowband detection spectrum 15 5.2.2 Method B.1 and Method C.1 broadband detection spectrum 15 5.3 Branching devices.15 5.4 Termination.16 6 Procedure 16 6.1 Method A broadband light source .16 6.1.
14、1 Attenuation-only 16 6.1.2 Return-loss-only 17 6.1.3 Attenuation and return loss18 6.2 Method B Tuneable narrowband light source 19 6.3 Method C Set of multiple fixed narrowband light sources20 6.3.1 Attenuation-only 20 6.3.2 Return-loss-only 22 6.3.3 Attenuation and return loss23 6.4 Test results
15、.25 7 Details to be specified 25 7.1 Source 25 7.1.1 Broadband source .25 7.1.2 Tuneable or discrete narrowband light source26 7.1.3 Depolarizer26 61300-3-7 IEC:2009(E) 3 7.2 Detection system.26 7.2.1 Optical power meter 26 7.2.2 Optical spectrum analyser .26 7.3 Reference branching device 26 7.4 Te
16、rmination.26 Annex A (informative) Device under test configurations, terminations and product types 27 Annex B (informative) Typical light source characteristics29 Figure 1 Wavelength dependence of attenuation and return loss .10 Figure 2 Method A Attenuation-only measurement 17 Figure 3 Method A Re
17、turn-loss-only measurement18 Figure 4 Method A Attenuation and return loss measurement19 Figure 5 Method C Attenuation-only measurement21 Figure 6 Method C Return-loss-only measurement.22 Figure 7 Method C Attenuation and return loss measurement .24 Figure 8 Wavelength dependent attenuation 25 Table
18、 1 Test methods and characteristics 11 Table 2 Wavelength dependent attenuation and return loss .25 Table A.1 Device under test configurations/terminations 27 Table A.2 Possible types of passive optical components (POC) .27 Table B.1 Types of broadband light source (BBS) and main characteristics .29
19、 Table B.2 Types of tuneable light source (TLS) and main characteristics .30 4 61300-3-7 IEC:2009(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-7: Examinations and measurements Wavelength depende
20、nce of attenuation and return loss of single mode components 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
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29、cation 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 to the possibility that some of the elements of this IEC Publi
30、cation may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61300-3-7 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre op
31、tics. This second edition cancels and replaces the first edition published in 2000. It constitutes a technical revision. Changes from the previous edition of this standard are to reflect changes made to IEC 61300- 1 and covers unidirectional and bi-directional methods of measurement. 61300-3-7 IEC:2
32、009(E) 5 The text of this standard is based on the following documents: FDIS Report on voting 86B/2771/FDIS 86B/2803/RVD 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
33、 with the ISO/IEC Directives, Part 2. A list of all parts of IEC 61300 series, published under the general title, Fibre 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 pub
34、lication will remain unchanged until the maintenance result 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 by a revised edition, or amended. A bilingual version o
35、f this standard may be issued at a later date. 6 61300-3-7 IEC:2009(E) FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return loss of single mode components 1 Scope This
36、part of IEC 61300-3 describes the various methods available to measure the wavelength dependence of attenuation A() and return loss RL(), of single-mode passive optical components (POC) used in fibre-optic (FO) telecommunications. It is not, however, applicable to dense wavelength division multiplex
37、ing (DWDM) devices. Measurement methods of wavelength dependence of attenuation of DWDM devices are described in IEC 61300-3-29. Definition of WDM device types is given in IEC 62074-1. Three measurement cases are herein considered: Measurement of A() only; Measurement of RL() only; Measurement of A(
38、) and RL() at the same time. These measurements may be performed in one direction (unidirectional) or bi-directionally. 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
39、references, the latest edition of the referenced (including any amendments) applies. IEC 61300-3-29, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-29: Examinations and measurements Measurement techniques for characterising the amplitude of th
40、e spectral transfer function of DWDM components IEC 62074-1, Fibre optic WDM devices Part 1: Generic specification 3 Abbreviations and acronyms For the purposes of this document, the following abbreviations and acronyms apply: A attenuation A() wavelength dependent attenuation ASE amplified spontane
41、ous emission BBD broadband detection BBS broadband source 61300-3-7 IEC:2009(E) 7 BD branching devices CWDM coarse wavelength division multiplexing DFB distributed feedback (laser) DOP degree of polarization DUT device under test DWDM dense wavelength division multiplexing DWS discrete wavelength so
42、urce ECL external cavity (tuneable) laser EDFL erbium-doped fibre laser FA fibre amplifier FP Fabry-Perot (laser) G() test system constant IL insertion loss IL() wavelength dependent insertion loss wavelength NLS narrowband light sources OPM optical power meter OSA optical spectrum analyser P i () w
43、avelength dependent power incident on the DUT P r () wavelength dependent power reflected by the DUT (from the input port of the DUT) P t () wavelength dependent power transmitted through the DUT ) ( P RL Gwavelength dependent reflected power measured for the determination of the test set-up constan
44、t ) ( P RL Giwavelength dependent incident power measured for the determination of the test set-up constant ) ( P A iwavelength dependent power incident on the DUT in case of the wavelength dependent attenuation measurement 8 61300-3-7 IEC:2009(E) ) ( P RL iwavelength dependent power incident on the
45、 DUT in case of the wavelength dependent return loss measurement PDL polarization dependent loss POC passive optical components PON passive optical network RBD reference branching device RBW resolution bandwidth RL return loss RL() wavelength dependent return loss RTM reference test method SMSR side
46、 mode suppression ratio SOA semiconductor amplifier SOP state of polarization T termination TJ temporary joint TND tuneable narrowband detection (system) TLS tuneable narrowband light source TN-OTDR tuneable OTDR WDM wavelength division multiplexing 4 General 4.1 General description A() and RL() are
47、 expressed in decibels (dB), transmitted by or reflected from a device under test (DUT) resulting from its insertion within a fibre-optic (FO) telecommunication system. A() and RL() are obtained by comparing the optical power incident on the DUT with the optical power transmitted at the output port
48、of the DUT; reflected from the input port of the DUT. The DUT is inverted in order to get a bi-directional measurement. Measurements should be taken in both directions and averaged expect where the device is intentionally not bidirectional no averaging shall be done . The term “return loss” should n
49、ot be used as equivalent to reflectance. Both have completely different meanings. 61300-3-7 IEC:2009(E) 9 4.2 Spectral conditions A() and RL() measurements are made over a wavelength range defined in the DUT specifications. The DUT spectral characteristics also defined in the DUT specifications should be used in turn to define the spectral characteristics of the measurement s
