1、TIA/EIA STANDARD ANSI/TIA/EIA-455-207-2OOO Approved: September 26, 2000 FOTP-207 IEC 61290-1-2 Optical Fibre Amplifiers - Basic Specification Part 1=2: Test Methods for Gain Parameters - Electrical Spectrum Analyzer TIA/EIA-455-207 OCTOBER 2000 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Repesenting the
2、 telecommunications industiy in association with the Electionic Industries fiance Elsctrrrnk Industries Alliance COPYRIGHT Electronic Industries AllianceLicensed by Information Handling ServicesNOTICE TIA/EIA Engineering Standards and Publications are designed to serve the public interest through el
3、iminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not
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6、to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determin
7、e the applicability of regulatory limitations before its use. These Materials are subject to copyright claims of IEC, ANSI, and TIA. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of TIA. All requests pertaini
8、ng to the FOTP-207-IEC 61290-1-2: Optical Fibre Amplifiers - Basic Specification Part 1-2: Test Methods for Gain Parameters - Electrical Spectrum Analyzer Standard should be submitted to TIA. (From Standards Proposal No. 4497, formulated under the cognizance of the TIA FO-2.1 Subcommittee on Single
9、Mode Systems.) Published by OTELECOMMUNICATIONS INDUSTRY ASSOCIATION 2000 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 2220 1 PRICE: Please refer to current Catalog of PUBLICATIONS or call Global Engineering Documents, USA and Canada (1-800-854-7179) International (303-397
10、-7956) EIA ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING All rights reserved Printed in U.S.A. COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998- TIA/EIA-455-207 CONTENTS Page . FOREWORD III INTRODUCTION . iv Clause 1 Scope and object 1
11、2 Normative reference 1 3 Apparatus 2 4 Test sample . 3 5 Procedure 4 6 Calculation 5 7 Test results . 6 Figure 1 - Typical arrangement of the electrical spectrum analyzer test apparatus for small-signal gain measurements . 2 Figure 2 - Typical behaviour of the gain as a function of the input signal
12、 power . 6 Annex A (informative) List of abbreviations . 9 Annex B (informative) Bibliography 1 O I COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998- TIA/EIA-455-207 II COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Servi
13、ces61290-1-2 O IEC:1998- TIA/EIA-455-207 FDIS 86C/l76/FDIS INTERNATIONAL ELECTROTECHN ICAL COMMISSION Report on voting 86C/200/RVD TI A/ E I A- 45 5 - 2 O 7 OPTICAL FIBRE AMPLIFIERS - BASIC SPECIFICATION - Part 1-2: Test methods for gain parameters - Electrical spectrum analyzer FOREWORD 1) The I EC
14、 (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and
15、 electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmenta
16、l and non- governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or
17、 agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for interna
18、tional use and are published in the form of standards, technical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum ext
19、ent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any eq
20、uipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International St
21、andard IEC 61 290-1 -2 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86: Fibre optics. It shall be read in conjunction with IEC 61291-1. . III COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:
22、1998- TIA/EIA-455-207 Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. Annexes A and B are for information only. iv COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998
23、- TIA/EIA-455-207 INTRODUCTION As far as can be determined, this is the first International Standard on optical fibre amplifiers. The technology of optical fibre amplifiers is quite new and still emerging, hence amendments and new editions to this standard can be expected. Each abbreviation introduc
24、ed 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 is given in annex A. V COPYRIGHT Electronic Industries AllianceLicensed by Information Handling ServicesCOPYRIGHT Electronic Industries AllianceLic
25、ensed by Information Handling Services61290-1-2 O IEC:1998- TIA/EIA-455-207 TI A/ E IA- 45 5 - 2 O 7 OPTICAL FIBRE AMPLIFIERS - BASIC SPECIFICATION - Part 1-2: Test methods for gain parameters - Electrical spectrum analyzer 1 Scope and object This part of IEC 61290 applies to optical fibre amplifier
26、s (OFAs) using active fibres, contain i ng 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 electrical spectrum analyzer test method, of the following OFA parameters, as defi
27、ned in clause 3 of IEC 61291-1: a) small-signal gain; b) reverse small-signal gain; c) maximum small-signal gain; d) maximum small-signal gain wavelength; e) maximum small-signal gain variation with temperature; f) small-signal gain wavelength band; g) small-signal gain wavelength variation; h) smal
28、l-signal gain stability; i) polarization-dependent gain variation. NOTE - All numerical values followed by ($) are intended to be currently under consideration 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of t
29、his part of IEC 61290. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 61290 are encouraged to investigate the possibility of applying the most recent edition of the normative document i
30、ndicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 61291-1, - Optical fibre amplifiers - Part I: Generic specification 1) 1) To be published 1 COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998-
31、 TIA/EIA-455-207 Optical source 3 Apparatus detector JI A diagram of the measurement set-up is given in figure 1. rn power meter Optical JI source Variable optical attenuator Signal generator IEC 699/98 Figure la - Measurement of time-averaged input signal optical power optical attenuatoi Signal gen
32、erator Electrical spectrum IEC 700/98 Figure 1 b - Measurement of input signal modulated electrical power J2 Optical detector JI source Variable optical attenuator I Electrical I O FA under test Signal U generator spectrum U analyzer IEC 707/98 Figure IC - Measurement of output signal modulated elec
33、trical power Figure 1 - Typical arrangement of the electrical spectrum analyzer test apparatus for small-signal gain measurements 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-tun
34、able: - fixed-wavelength optical 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 narrow
35、er than 1 nm ($). A distributed 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 t
36、he 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 broadening at the foot of the lasing spectrum shall be minimal for laser sources; - wavelengt
37、h-tunable optical source: This optical source shall be able to generate a wavelength-tunable light within the range specified in the relevant detail specification. 2 COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998- TIA/EIA-455-207 Its optical pow
38、er 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 ($). An ECL or an LED with a narrow bandpass optical filter is applicable, for example. The sup
39、pression ratio of side modes for the ECL shall be higher than 30 dB ($). 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 broadening at the foot of the lasing spectrum shall be minimal
40、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 f0,2 dB, irrespective of the state of polarization, within the operational wavelength bandwidth of the OFA. A dynamic range exceeding th
41、e measured gain is required (e.9. 40 dB); c) electrical spectrum analyzer: The spectral-power-measurement error shall be better than f0,5 dB (optical). The linearity shall be better than f0,2 dB (optical); d) optical isolator: Optical isolators may be used to bracket the OFA. The polarization- depen
42、dent 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 ($) at each port; e) variable optical attenuator: The attenuation range and stability shall be over 40 dB ($) and better
43、 than f0,l 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.9. linear, elliptical and circular). For example, the polariz
44、ation 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 variation of the polarization controller shall
45、be less than 0,2 dB ($). The reflectance from this device shall be smaller than -40 dB ($) at each port; 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 OFA. The reflectance fro
46、m this device shall be smaller than -40 dB ($) at each port, and the length of the jumper shall be shorter than 2 m; h) optical connectors: The connection loss repeatability shall be better than f0,2 dB; i) optical detector: This device shall be highly polarization insensitive and have a linearity b
47、etter than f0,2 dB; NOTE - In order to minimize the saturation effects due to high d.c. levels, the optical detector output should be a.c. coupled. j) signal generator: The signal generator shall generate a sinusoidal wave at a frequency higher than several hundreds of kilohertz with a linearity bet
48、ter than fl,5 dB. NOTE - For small-signal gain measurements an optical chopping system could be used alternatively 4 Test sample The OFA shall operate at nominal operating conditions. If the OFA is likely to cause laser oscillations due to unwanted reflections, optical isolators should be used to br
49、acket the OFA under test. This will minimize the signal instability and the measurement inaccuracy. 3 COPYRIGHT Electronic Industries AllianceLicensed by Information Handling Services61290-1-2 O IEC:1998- TIA/EIA-455-207 For measurements of parameters a) to h) (of clause I), care shall be taken in m
50、aintaining 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 err
