1、BRITISH STANDARDBS EN 61290-1-2:2005Optical amplifiers Test methods Part 1-2: Power and gain parameters Electrical spectrum analyzer methodThe European Standard EN 61290-1-2:2005 has the status of a British StandardICS 33.100.99g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g
2、53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 61290-1-2:2005This British Standard was published under the authority of th
3、e Standards Policy and Strategy Committee on 31 January 2007 BSI 2007ISBN 978 0 580 50060 2National forewordThis British Standard was published by BSI. It is the UK implementation of EN 61290-1-2:2005. It is identical with IEC 61290-1-2:2005. It supersedes BS EN 61290-1-2:1998 and BS EN 61290-2-2:19
4、98, which are withdrawn.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/3, Fibre optic systems and active devices.A list of organizations represented on GEL/86/3 can be obtained on request to its secretary.This publication doe
5、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Wed Apr 11 08:
6、19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 61290-1-2 NORME EUROPENNE EUROPISCHE NORM December 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secret
7、ariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61290-1-2:2005 E ICS 33.100.99 Supersedes EN 61290-1-2:1998English version Optical amplifiers - Test methods Part 1-2: Power and gai
8、n parameters - Electrical spectrum analyzer method (IEC 61290-1-2:2005) Amplificateurs optiques - Mthodes dessai Partie 1-2: Paramtres de puissance et de gain - Mthode de lanalyseur de spectre lectrique (CEI 61290-1-2:2005) Prfverfahren fr Lichtwellenleiter-Verstrker Teil 1-2: Optische Leistungs- un
9、d Verstrkerparameter - Verfahren mit elektrischem Spektralanalysator (IEC 61290-1-2:2005) This European Standard was approved by CENELEC on 2005-10-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the s
10、tatus 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 European Standard exists in three official versions (English, French, Germa
11、n). 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 are the national electrotechnical committees of Austria, Belgium, Cyprus, C
12、zech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00
13、:00 2007, Uncontrolled Copy, (c) BSIEN 61290-1-2:2005 2 Foreword The text of document 86C/672/FDIS, future edition 2 of IEC 61290-1-2, prepared by SC 86C, Fibre optic systems and active devices, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
14、 EN 61290-1-2 on 2005-10-01. This European Standard supersedes EN 61290-1-2:1998. It includes the measurement of gain parameters previously covered in EN 61290-2-1. Also, the scope of the measurement method has been broadened to include semiconductor optical amplifiers and waveguide optical amplifie
15、rs in addition to optically-pumped fibre amplifiers. This standard is to be read in conjunction with EN 61291-1. The following dates were 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) 2006-08-01 lat
16、est date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61290-1-2:2005 was approved by CENELEC as a European Standard without any modification. Licensed
17、Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 EN 61290-1-2:2005 CONTENTS INTRODUCTION 4 1 Scope 5 2 Normative references .6 3 Acronyms and abbreviations.6 4 Apparatus 6 5 Test sample .9 6 Procedure 9 7 Calculation .12 8 Test results 14 Bibliography .16 Annex ZA
18、 (normative) Normative references to international publications with their corresponding European publications . 17 Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 61290-1-2:2005 4 INTRODUCTION This International Standard is devoted to the subject of opt
19、ical amplifiers. The technology of optical amplifiers is still rapidly evolving, hence amendments and new editions to this standard can be expected. Each abbreviation introduced in this International Standard is explained in the text at least the first time it appears. However, for an easier underst
20、anding of the whole text, a list of all abbreviations used in this International Standard is given in Clause 3. Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 EN 61290-1-2:2005 _ OPTICAL AMPLIFIERS TEST METHODS Part 1-2: Power and gain parameters Electr
21、ical spectrum analyzer method 1 Scope This part of IEC 61290 applies to all commercially available optical amplifiers (OAs) and optically amplified sub-systems. It applies to OAs using optically pumped fibres (OFAs based on either rare-earth doped fibres or on the Raman effect), semiconductors (SOAs
22、), and waveguides (POWAs). NOTE The applicability of the test methods described in the present standard to distributed Raman amplifiers is for further study. The object of this standard is to establish uniform requirements for accurate and reliable measurements, by means of the electrical spectrum a
23、nalyzer test method, of the following OA parameters, as defined in Clause 3 of IEC 61291-1: a) nominal output signal power b) gain; c) reverse gain; d) maximum gain; e) polarization-dependent gain; f) large-signal output stability; g) saturation output power; h) maximum input signal power; i) maximu
24、m output signal power; j) input power range; k) output power range; l) maximum total output power. In addition this test method provides a means for measuring the following parameters: maximum gain wavelength; gain wavelength band. NOTE All numerical values followed by () are suggested values for wh
25、ich the measurement is assured. Other values may be acceptable, but should be verified. The object of this standard is specifically directed to single-channel amplifiers. For multichannel amplifiers, one should refer to the IEC 61290-10 series1. 1See Bibliography. Licensed Copy: Wang Bin, na, Wed Ap
26、r 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 61290-1-2:2005 6 _ 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 references, the latest edition of the refe
27、renced document (including any amendments) applies. IEC 60793-1-40: Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 61291-1:2005 Optical amplifiers Part 1: Generic specification23 Acronyms and abbreviations ASE amplified spontaneous emission DBR distributed Bragg re
28、flector (laser diode) DFB distributed feedback (laser diode) ECL external cavity laser (diode) LED light emitting diode OA optical amplifier OFA optical fibre amplifier POWA planar optical waveguide amplifier SOA semiconductor optical amplifier 4 Apparatus A diagram of the measurement set-up is give
29、n in Figure 1. 2A first edition of IEC 61291-1 was published in 1998 under the title Optical fibre amplifiers Part 1: Generic specification. Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 7 EN 61290-1-2:2005 b) Electrical input signal power c) Electrical
30、output signal power dB J1 J2OA under test dB OAOptical source Optical source Optical power meter Optical power meterVariable optical attenuator Variable optical attenuator Signal generator Signal generator Polarisation controller PolarisationcontrollerOptical coupler Optical coupler Optical detector
31、 Optical detector Electrical spectrum analyzer Electrical spectrum analyzer Variable optical attenuator dB Optical source a) Average optical input signal power Signal generator Optical power meter Optical power meter Polarisationcontroller Optical coupler J1J1J2 IEC 1610/05 IEC 1611/05 IEC 1612/05 F
32、igure 1 Typical arrangement of the electrical spectrum analyzer test apparatus for measurement of (a) average optical input signal power, (b) electrical input signal power and (c) electrical output signal power. Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c)
33、BSIEN 61290-1-2:2005 8 The test equipment listed below, with the required characteristics, is needed. a) Optical source: The optical source shall be either at fixed wavelength or wavelength-tunable. Fixed-wavelength optical source: This optical source shall generate a light with a wavelength and opt
34、ical power specified in the relevant detail specification. Unless otherwise specified, the optical source shall emit modulated light with the full width at half maximum of the spectrum narrower than 1 nm (). A distributed feedback (DFB) laser, a distributed Bragg reflector (DBR) laser, an external c
35、avity laser (ECL) diode and a light-emitting diode (LED) with a narrow-band filter are applicable, for example. The suppression ratio for the side modes for the DFB laser, the DBR laser or the ECL shall be higher than 30 dB (). The output power fluctuation shall be less than 0,05 dB (), which may be
36、 better attainable with an optical isolator at the output port of the optical source. Spectral broadening at the foot of the lasing spectrum shall be minimal for laser sources. Wavelength-tunable optical source: This optical source shall be able to generate a wavelength-tunable light within the rang
37、e specified in the relevant detail specification. Its optical power shall be specified in the relevant detail specification. Unless otherwise specified, the optical source shall emit modulated light with the full width at half maximum of the spectrum narrower than 1 nm (). An ECL or an LED with a na
38、rrow bandpass optical filter is applicable, for example. The suppression ratio of side modes for the ECL shall be higher than 30 dB (). The output power fluctuation shall be less than 0,05 dB, which may be better attainable with an optical isolator at the output port of the optical source. Spectral
39、broadening at the foot of the lasing spectrum shall be minimal for the ECL. NOTE The use of an LED should be limited to small-signal gain measurements. b) Optical power meter: It shall have a measurement accuracy better than 0,2 dB, irrespective of the state of polarization, within the operational w
40、avelength bandwidth of the OA. A dynamic range exceeding the measured gain is required (e.g. 40 dB). c) Electrical spectrum analyzer: The spectral-power-measurement error shall be better than 0,5 dB (optical). The linearity shall be better than 0,2 dB (optical). d) Optical isolator: Optical isolator
41、s may be used to bracket the OA. The polarization-dependent loss variation of the isolator shall be better than 0,2 dB (). Optical isolation shall be better than 40 dB (). The reflectance from this device shall be smaller than 40 dB () at each port. e) Variable optical attenuator: The attenuation ra
42、nge and stability shall be over 40 dB () and better than 0,1 dB (), respectively. The reflectance from this device shall be smaller than 40 dB () at each port. f) Polarization controller: This device shall be able to provide as input signal light all possible states of polarization (e.g. linear, ell
43、iptical and circular). For example, the polarization controller may consist of a linear polarizer followed by an all-fibre-type polarization controller, or by a linear polarizer followed by a quarter-wave plate rotatable by minimum of 90 and a half wave plate rotatable by minimum of 180. The loss va
44、riation of the polarization controller shall be less than 0,2 dB (). The reflectance from this device shall be smaller than 40 dB () at each port. The use of a polarization controller is considered optional, except for the measurement of polarization dependent gain, but may also be necessary to achi
45、eve the desired accuracy of other power and gain parameters for OA devices exhibiting significant polarization dependent gain. g) Optical fibre jumpers: The mode field diameter of the optical fibre jumpers used should be as close as possible to that of fibres used as input and output ports of the OA
46、. The reflectance from this device shall be smaller than 40 dB () at each port, and the length of the jumper shall be shorter than 2 m. Licensed Copy: Wang Bin, na, Wed Apr 11 08:19:54 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 9 EN 61290-1-2:2005 h) Optical connectors: The connection loss repeatabi
47、lity shall be better than 0,2 dB. i) Optical detector: This device shall be highly polarization insensitive and have a linearity better than 0,2 dB. NOTE In order to minimize the saturation effects due to high d.c. levels, the optical detector output shall be a.c. coupled. j) Signal generator: The s
48、ignal generator shall generate a sinusoidal wave at a frequency higher than several hundreds of kilohertz with a linearity better than 1,5 dB. NOTE For small-signal gain measurements an optical chopping system could be used alternatively. k) Optical coupler: The polarization dependence of the branch
49、ing ratio of the coupler shall be minimal. Change of the state of polarization of the input light shall be negligible. Any free port of the coupler shall be properly terminated, in such a way as to decrease the reflectance below -40 dB (). 5 Test sample The OA shall operate at nominal operating conditions. If the OA is likely to cause laser oscillations due to unwanted reflections, optical isolators should be used to bracket the OA under test. This will m
