IEC 61280-1-3-2010 Fibre optic communication subsystem test procedures - Part 1-3 General communication subsystems - Central wavelength and spectral width measu.pdf

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1、 IEC 61280-1-3 Edition 2.0 2010-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic communication subsystem test procedures Part 1-3: General communication subsystems Central wavelength and spectral width measurement Procdures dessai des sous-systmes de tlcommunication fibres optiques Partie

2、1-3: Sous-systmes gnraux de tlcommunication Mesure de la longueur donde centrale et de la largeur spectrale IEC 61280-1-3:2010 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduce

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16、e publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61280-1-3 Edition 2.0 2010-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic communication subsystem test procedures Part 1-3: General communication subsystems Central wavelength and spectral width measurement Procdu

17、res dessai des sous-systmes de tlcommunication fibres optiques Partie 1-3: Sous-systmes gnraux de tlcommunication Mesure de la longueur donde centrale et de la largeur spectrale INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE Q ICS 33.180.01 PRICE CODE CODE PRIX

18、ISBN 978-2-8322-0931-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette

19、 publication via un distributeur agr. 2 61280-1-3 IEC:2010 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 3.1 Wavelength . 5 3.2 Spectral width . 6 3.3 Additional spectral characteristics . 6 4 Apparatus . 6 4.1 Calibrated optical spectrum analyzer . 6 4.2 P

20、ower supplies 7 4.3 Input signal source or modulator . 7 4.4 Test cord . 7 5 Test sample 7 6 Procedure (Method A) 7 6.1 General . 7 6.2 Setup 7 6.3 Adjustment of spectrum analyzer controls . 8 7 Procedure (Method B) 8 7.1 Setup 8 7.2 Adjustment of spectrum analyzer controls . 9 7.3 Continuous LED an

21、d SLM spectra . 9 7.4 Discrete MLM spectra 9 7.5 Continuous SLM spectra . 10 8 Calculation . 10 8.1 General . 10 8.2 Centre wavelength 10 8.3 Centroidal wavelength . 10 8.4 Peak wavelength . 11 8.5 RMS spectral width ( rms ) 11 8.6 n-dB spectral width ( n-dB ) . 11 8.7 Full-width half-maximum spectr

22、al width ( fwhm ) 11 8.8 Side-mode suppression ratio (SMSR) . 12 9 Test results 12 9.1 Required information . 12 9.2 Information to be available on request . 12 10 Example results 12 Figure 1 Example of a LED optical spectrum 13 Figure 2 Typical spectrum analyzer output for an MLM laser 15 Figure 3

23、fwhmspectral width measurement for MLM laser . 16 Figure 4 fwhmspectral width calculation for MLM laser 16 Figure 5 Peak emission wavelength and 30dBmeasurement for SLM laser 17 Table 1 Measurement points for LED spectrum from Figure 1 13 Table 2 RMS spectral characterization . 14 61280-1-3 IEC:2010

24、 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES Part 1-3: General communication subsystems Central wavelength and spectral width measurement FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardizat

25、ion comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes Internatio

26、nal Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in t

27、his preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the t

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31、 or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carr

32、ied out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Com

33、mittees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn

34、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 Publication may be the subject of patent rights. IEC shall not be

35、 held responsible for identifying any or all such patent rights. International Standard IEC 61280-1-3 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86. This second edition cancels and replaces the first edition published in 1998. This editi

36、on constitutes a technical revision with changes reflecting new laser technology and includes a second method modified for state of the art instrumentation. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2010-03. 4 61280-1-3 IEC:2010 The text of this st

37、andard is based on the following documents: CDV Report on voting 86C/ 887/CDV 86C/ 937/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. This publication

38、 has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 61280 series can be found, under the general title Fibre optic communication subsystem test procedures, on the IEC website. The committee has decided that the contents of this amendment and the base p

39、ublication will remain unchanged until the stability 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. 61280-1-3 IEC:2010 5 FIBRE O

40、PTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES Part 1-3: General communication subsystems Central wavelength and spectral width measurement 1 Scope This part of IEC 61280 provides definitions and measure procedures for several wavelength and spectral width properties of an optical spectrum associated

41、with a fibre optic communication subsystem, an optical transmitter, or other light sources used in the operation or test of communication subsystems. The measurement is done for the purpose of system construction and/or maintenance. In the case of communication subsystem signals, the optical transmi

42、tter is typically under modulation. NOTE Different properties may be appropriate to different spectral types, such as continuous spectra characteristic of light-emitting diodes (LEDs), and multilongitudinal-mode (MLM), multitransverse-mode (MTM) and single-longitudinal mode (SLM) spectra, characteri

43、stic of laser diodes (LDs). 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 amendments) applies

44、. IEC 60825-1, Safety of laser products Part 1: Equipment classification and requirements IEC 62129, Calibration of optical spectrum analyzers 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Wavelength NOTE The following wavelength terms prov

45、ide quantitative definitions for the describing the central wavelength of a spectrum. In this standard, “central wavelength” is a general category label for these terms. 3.1.1 centre wavelength 0also called “half-power mid-point”, the mean of the closest spaced half-power wavelengths in an optical s

46、pectrum, one above and one below the peak wavelength 3.1.2 half-power wavelength 3dBa wavelength corresponding to a half peak power value of the optical spectrum 6 61280-1-3 IEC:2010 3.1.3 peak wavelength pthe wavelength corresponding to the maximum power value of the optical spectrum 3.1.4 centroid

47、al wavelength cthe mean or average wavelength of an optical spectrum 3.2 Spectral width 3.2.1 root-mean-square (rms) width rmsthe square root of the second moment of the power distribution about the centroidal wavelength 3.2.2 n-dB-down width n-dBthe positive difference of the closest spaced wavelen

48、gths, one above and one below the peak wavelength p , at which the spectral power density is n dB down from its peak value 3.2.3 full-width at half-maximum fwhma special case of n-dB-down width with n = 3 3.3 Additional spectral characteristics 3.3.1 side-mode suppression ratio SMSR the ratio of the

49、 largest peak of the optical spectrum to the second largest peak, for a nominally SLM spectrum (see 8.8) 4 Apparatus 4.1 Calibrated optical spectrum analyzer This special-purpose test equipment uses a dispersive spectrophotometric method to resolve and record the optical spectral distribution. The required wavelength resolution and range depends on the type and variety of