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、53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61290-1-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2007ISBN 978 0 580 50060 2
3、National 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 It supersedes BS EN 61290-1-2:1998 and BS EN 61290-2-2:1998, which are withdrawn.The UK participation in its preparation was entrusted by Technical
4、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 does not purport to include all the necessary provisions of a contract. Users are responsible
5、for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61290-1-2 NORME EUROPENNE EUROPISCHE NORM December 2005 CENELEC European Committee for Electrotechnical Standardi
6、zation Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: 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
7、 E ICS 33.100.99 Supersedes EN 61290-1-2:1998English version Optical amplifiers - Test methods Part 1-2: Power and gain 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
8、de spectre lectrique (CEI 61290-1-2:2005) Prfverfahren fr Lichtwellenleiter-Verstrker Teil 1-2: Optische Leistungs- und 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 c
9、omply with the CEN/CENELEC Internal Regulations which stipulate the conditions for 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 Central
10、Secretariat or to any CENELEC member. This European Standard exists in three 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 Central Secretariat has the same status
11、 as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slov
12、akia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 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
13、 was approved by CENELEC as 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
14、 waveguide optical amplifiers 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 endor
15、sement (dop) 2006-08-01 latest 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
16、any modification. 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 (normative) Normative references to international publications w
17、ith their corresponding European publications . 17 EN 61290-1-2:2005 4 INTRODUCTION This International Standard is devoted to the subject of optical amplifiers. The technology of optical amplifiers is still rapidly evolving, hence amendments and new editions to this standard can be expected. Each ab
18、breviation introduced in this International 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 International Standard is given in Clause 3. 5 EN 61290-1-2:2005 _ OPTICAL AMPLIFIERS TES
19、T METHODS Part 1-2: Power and gain parameters Electrical 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
20、fibres or on the Raman effect), semiconductors (SOAs), 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
21、 measurements, by means of the electrical spectrum analyzer 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 ou
22、tput power; h) maximum input signal power; i) maximum 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 numeric
23、al values followed by () are suggested values for which 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. 1S
24、ee Bibliography. EN 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 referenced document (including any amendmen
25、ts) 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 reflector (laser diode) DFB distributed f
26、eedback (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 given in Figure 1. 2A first edition of IEC
27、61291-1 was published in 1998 under the title Optical fibre amplifiers Part 1: Generic specification. 7 EN 61290-1-2:2005 b) Electrical input signal power c) Electrical output signal power dB J1 J2OA under test dB OAOptical source Optical source Optical power meter Optical power meterVariable optica
28、l attenuator Variable optical attenuator Signal generator Signal generator Polarisation controller PolarisationcontrollerOptical coupler Optical coupler Optical detector Optical detector Electrical spectrum analyzer Electrical spectrum analyzer Variable optical attenuator dB Optical source a) Averag
29、e 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 Figure 1 Typical arrangement of the electrical spectrum analyzer test apparatus for measurement of (a) average optical input signal
30、power, (b) electrical input signal power and (c) electrical output signal power. EN 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 optica
31、l source: This optical source shall generate a light with a wavelength and optical 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
32、feedback (DFB) laser, a distributed Bragg reflector (DBR) laser, an external cavity 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 d
33、B (). 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 broadening at the foot of the lasing spectrum shall be minimal for laser sources. Wavelength-tunable optical source: This optic
34、al source shall be able to generate a wavelength-tunable light within the range 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
35、half maximum of the spectrum narrower than 1 nm (). An ECL or an LED with a narrow 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 attainabl
36、e 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 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 th
37、an 0,2 dB, irrespective of the state of polarization, within the operational wavelength 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 linearit
38、y shall be better than 0,2 dB (optical). d) Optical isolator: Optical isolators 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
39、than 40 dB () at each port. e) Variable optical attenuator: The attenuation range 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 provi
40、de as input signal light all possible states of polarization (e.g. linear, elliptical 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 b
41、y minimum of 90 and a half wave plate rotatable by minimum of 180. The loss variation 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
42、 measurement of polarization dependent gain, but may also be necessary to achieve 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 a
43、s close as possible to that of fibres used as input and output ports of the OA. 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. 9 EN 61290-1-2:2005 h) Optical connectors: The connection loss repeatability shall be
44、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 signal generato
45、r 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 branching ratio of t
46、he 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
47、 OA is likely to cause laser oscillations due to unwanted reflections, optical isolators should be used to bracket the OA under test. This will minimize the signal instability and the measurement inaccuracy. For measurements of parameters a) to l) of Clause 1 except e), care shall be taken in mainta
48、ining the state of polarization of the input light during the measurement. Changes in the polarization state of the input light may result in input optical power changes, because of the slight polarization dependency expected from all the optical components used, this leading to measurement errors.
49、6 Procedure The measurement procedure is as follows. a) Nominal output signal power: The nominal output signal power is given by the minimum output signal optical power, for an input signal optical power specified in the relevant detail specification, and under nominal operating conditions, given in the relevant detail specification. To find this minimum value, input and output signal power levels shall be continuously monitored for a given duration o
