1、ANSI/TIA/EIA-455-221-2001 Approved: December 20, 2001 TIA/EIA STANDARD FOTP-22 1 IEC 6 1290-5- 1 Optical Fibre Amplifiers - Basic Specification Part 5-1 : Test Methods for Reflectance Parameters - Optical Spectrum Analyzer TIA/EIA-455-221 DECEMBER 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Represe
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21、IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 CONTENTS Page 1 2 3 4 5 6 7 Scope and object . . Normative references . . . . 1 . . 3 Procedure . . 3 . 3 5.1.1 Calibration . .4 5.1.2 OFA reflectance measurement . 5 5.2 Output reflectance . . 5 Calculation . . . 5 6.2 Output reflectance . Test results . 7.1
22、 Maximum and minimum input reflectance 7.2 Output reflectance . I Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 II Copyright Telecommunication
23、s Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 FDIS 86C/270/FD I S INTERNATIONAL ELECTROTECHNICAL COMMISSION Report on voting 86C/272/RVD OPTICAL FIBRE AMPLIFIERS - BASIC
24、 SPECIFICATION - Part 5-1 : Test methods for reflectance parameters - Optical spectrum analyser FOREWORD The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of th
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31、ct of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61290-5-1 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86: Fibre optics. This standard should be read in c
32、onjunction with IEC 61291-1. The text of this standard is based on the following documents: Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. Annex A is for information only. This publication has been drafted in accord
33、ance with the ISO/IEC Directives, Part 3. The committee has decided that the contents of this publication will remain unchanged until 2006. At this date, the publication will be reconfirmed; . III Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleN
34、o reproduction or networking permitted without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 withdrawn; amended. replaced by a revised edition, or iv Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted
35、without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 INTRODUCTION As far as can be determined, this is the first International Standard on this subject. The technology of optical fibre amplifiers is quite new and still emerging, hence amendments to and new editions of this standard can be e
36、xpected. Each abbreviation introduced in this standard is explained in the text at least the first time it appears. However, for an easier understanding of the whole text, a list of all abbreviations used in this standard is given in annex A. V Copyright Telecommunications Industry Association Provi
37、ded by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 vi Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted withou
38、t license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 OPTICAL FIBRE AMPLIFIERS - BASIC SPECIFICATION - Part 5-1 : Test methods for reflectance parameters - Optical spectrum analyser 1 Scope and object This International Standard applies to optical fibre amplifiers (OFAs) using active fibres, conta
39、ining rare-earth dopants, presently commercially available. The object of this standard is to establish uniform requirements for accurate and reliable measurements, by means of the optical spectrum analyzer test method, of the following OFA parameters, as defined in clause 3 of IEC 61291-1: a) maxim
40、um input reflectance; b) minimum input reflectance; c) output reflectance. NOTE All numerical values followed by ($) are currently under consideration 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part
41、 of IEC 61290. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61290 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicat
42、ed below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 61291-1:1998, Opfical fibre amplifiers - Parf 1: Generic specificafion NOTE A list of informative references i
43、s given in the bibliography. 3 Apparatus A scheme of the measurement set-up is given in figure I. The test equipments listed below, with the required characteristics, are needed. The polarization-dependent loss variation of each optical passive component listed below shall be better than 0,2 dB (3).
44、 a) Opfical source: The optical source shall be either at fixed wavelength or wavelength-tuneable. It shall generate light at wavelength specified in the relevant detail specification, and shall emit enough optical power to allow measurements of reflectance of -50 dB to -60 dB. The suppression ratio
45、 of side modes shall be higher than 30 dB(3). An optical isolator with isolation greater than 40 dB shall be either integrated within the source package, or connected at the source output. The source shall be linearly polarized, in order to accomplish 1 Copyright Telecommunications Industry Associat
46、ion Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-61290-5-1 O IEC:2000 TIA-455-221 OPTICAL SOURCE high precision measurements of amplified spontaneous emission (ASE) power within a narrow optical bandwidth. NOTE A DFB laser o
47、r an external cavity laser can be suitable optical sources. b) Optical coupler: A 3 dB, 2 x 2 optical coupler is needed. It shall have an insertion loss lower than 3,5 dB ($) and a directivity not lower than 60 dB. Its input connectors shall have reflectance lower than -60 dB ($). Its output connect
48、or shall be of the same type as the OFA input connector. Its output unused port shall have a reflectance lower than -60 dB ($). The polarization dependent loss of the optical coupler shall be less than 0,5 dB ($). - 1 - PO LARI ZATI O N 71 3 CONTROLLER 2x2 Opfical power mefer: This device is used fo
49、r calibration purposes. It shall have a measurement accuracy better than k0,2 dB, a dependence of the state of polarization lower than 0,l dB ($), within the operational wavelength bandwidth of the OFA. Its dynamic range shall exceed the range of reflectance to be measured. Opfical specfrum analyzer: Its linearity and accuracy of spectral-power-measurement shall be better than kl,5 dB an
