1、 IEC 60728-6 Edition 3.0 2011-04 INTERNATIONAL STANDARD Cable networks for television signals, sound signals and interactive services Part 6: Optical equipment IEC 60728-6:2011(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 IEC, Geneva, Switzerland All rights reserved. Unless otherwise sp
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9、 television signals, sound signals and interactive services Part 6: Optical equipment INTERNATIONAL ELECTROTECHNICAL COMMISSION XB ICS 33.060.40; 33.160.99 PRICE CODE ISBN 978-2-88912-427-5 Registered trademark of the International Electrotechnical Commission 2 60728-6 IEC:2011(E) CONTENTS FOREWORD
10、. 6 INTRODUCTION . 8 1 Scope . 9 2 Normative references 9 3 Terms, definitions, symbols and abbreviations 11 3.1 Terms and definitions 11 3.2 Symbols 18 3.3 Abbreviations . 19 4 Methods of measurement 20 4.1 Measurement requirements . 20 4.1.1 General . 20 4.1.2 Input specification 20 4.1.3 Measurem
11、ent conditions 20 4.2 Optical power 21 4.3 Loss, isolation, directivity and coupling ratio . 21 4.3.1 General . 21 4.3.2 Measurement requirements 21 4.3.3 Principle of measurement 21 4.4 Return loss 22 4.5 Saturation output power of an optical amplifier . 22 4.5.1 Purpose . 22 4.5.2 Procedure 22 4.6
12、 Centroidal wavelength and spectral width under modulation . 22 4.7 Linewidth and chirping of transmitters with single mode lasers . 23 4.7.1 Purpose . 23 4.7.2 Equipment required 23 4.7.3 General measurement requirements 23 4.7.4 Procedure 23 4.7.5 Potential sources of error . 25 4.8 Optical modula
13、tion index 25 4.8.1 Purpose . 25 4.8.2 Equipment required 25 4.8.3 Procedure 25 4.8.4 Potential sources of error . 26 4.9 Reference output level of an optical receiver 26 4.9.1 Purpose . 26 4.9.2 Equipment required 26 4.9.3 General measurement requirements 27 4.9.4 Procedure 27 4.9.5 Potential sourc
14、es of error . 27 4.10 Slope and flatness . 28 4.10.1 Purpose . 28 4.10.2 Equipment required 28 4.10.3 Procedure 28 4.10.4 Potential sources of error . 29 60728-6 IEC:2011(E) 3 4.11 Composite second order distortion (CSO) of optical transmitters 29 4.11.1 Purpose . 29 4.11.2 Equipment required 30 4.1
15、1.3 Procedure 30 4.11.4 Potential sources of error . 30 4.12 Composite triple beats (CTB) of optical transmitters . 30 4.12.1 Purpose . 30 4.12.2 Equipment required 31 4.12.3 Procedure 31 4.12.4 Potential sources of error . 31 4.13 Composite crossmodulation of optical transmitters . 31 4.13.1 Purpos
16、e . 31 4.13.2 Equipment required 32 4.13.3 Procedure 32 4.13.4 Potential sources of error . 34 4.14 Receiver intermodulation . 34 4.14.1 Purpose . 34 4.14.2 Equipment required 34 4.14.3 General measurement requirements 35 4.14.4 Procedure 35 4.14.5 Potential sources of error . 36 4.15 Microscopic ga
17、in tilt of optical amplifiers 36 4.15.1 Purpose . 36 4.15.2 Equipment required 36 4.15.3 Procedure 37 4.15.4 Potential sources of error . 38 4.16 Noise parameters of optical transmitters and optical receivers . 38 4.16.1 Purpose . 38 4.16.2 Equipment required 38 4.16.3 General measurement requiremen
18、ts 39 4.16.4 Procedure 40 4.16.5 Relative intensity noise 42 4.16.6 Equivalent input noise current density 42 4.16.7 Potential sources of error . 42 4.17 Method for combined measurement of relative intensity noise (RIN), optical modulation index and equivalent input noise current . 43 4.17.1 Purpose
19、 . 43 4.17.2 Equipment required 43 4.17.3 General measurement conditions . 44 4.17.4 Procedure 44 4.17.5 Potential sources of error . 45 4.18 Noise figure of optical amplifiers 45 4.19 Influence of fibre 45 4.19.1 Purpose . 45 4.19.2 Equipment required 45 4.19.3 Procedure 45 4.19.4 Potential sources
20、 of error . 45 4.20 SBS threshold . 46 4 60728-6 IEC:2011(E) 4.20.1 Purpose . 46 4.20.2 Equipment required 46 4.20.3 Procedure 46 4.20.4 Potential sources of error . 47 4.21 Carrier-to-crosstalk ratio (CCR) . 47 4.21.1 Purpose . 47 4.21.2 Equipment required 47 4.21.3 Procedure 47 4.21.4 Potential so
21、urces of error . 48 5 Universal performance requirements and recommendations 48 5.1 Safety 48 5.2 Electromagnetic compatibility (EMC) 48 5.3 Environmental . 48 5.3.1 Requirements 48 5.3.2 Storage 49 5.3.3 Transportation . 49 5.3.4 Installation or maintenance 49 5.3.5 Operation 49 5.4 Marking . 49 6
22、Active equipment 49 6.1 Optical forward path transmitters . 49 6.1.1 Classification . 49 6.1.2 Data publication requirement 50 6.1.3 Recommendations . 50 6.1.4 Performance requirements . 51 6.2 Optical return path transmitters 53 6.2.1 Classificaton 53 6.2.2 Data publication requirement 53 6.2.3 Rec
23、ommendations . 53 6.2.4 Performance requirements . 54 6.3 Optical receivers 54 6.3.1 Classification . 54 6.3.2 Data publication requirements 54 6.3.3 Recommendations . 55 6.3.4 Performance requirements . 55 6.4 Optical amplifiers . 56 6.4.1 Classification . 56 6.4.2 Data publication requirements 56
24、6.4.3 Performance requirements . 56 7 Connectors and splices . 57 Annex A (normative) Product specification worksheet for optical amplifiers . 58 Annex B (informative) Calculation of second-order distortion caused by microscopic gain tilt of optical amplifiers . 59 Bibliography 60 60728-6 IEC:2011(E
25、) 5 Figure 1 Tilt and microscopic gain tilt of optical amplifiers . 17 Figure 2 Measurement of optical loss, directivity and isolation . 21 Figure 3 Optical saturation output power . 22 Figure 4 Measurement of the chirping and the linewidth of transmitters . 24 Figure 5 Measurement of the optical mo
26、dulation index 26 Figure 6 Measurement of the reference output level of an optical receiver . 27 Figure 7 Measurement of the slope and flatness . 28 Figure 8 Evaluation of the slope . 29 Figure 9 Evaluating the flatness 29 Figure 10 Device under test for measuring CSO of optical transmitters . 30 Fi
27、gure 11 Device under test for measuring CTB of optical transmitters 31 Figure 12 Arrangement for measuring composite crossmodulation of optical transmitters . 33 Figure 13 Arrangement of test equipment for measuring receiver intermodulation . 35 Figure 14 Arrangement of test equipment for measuring
28、microscopic gain tilt 37 Figure 15 System with internal noise sources . 38 Figure 16 PIN diode receiver 39 Figure 17 Optical transmission system under test . 40 Figure 18 Arrangement of test equipment for carrier-to-noise measurement 40 Figure 19 Measurement set-up for determination of the noise par
29、ameters and the optical modulation index 44 Figure 20 Arrangement for measuring the SBS threshold 46 Figure 21 Arrangement for measuring the CCR 47 Figure 22 Classification of return path transmitters . 53 Table 1 Noise correction factors C nfor different noise level differences D . 41 Table 2 Class
30、es of optical forward path transmitters . 50 Table 3 Data publication requirements for optical forward path transmitters 50 Table 4 Recommendations for optical forward path transmitters 51 Table 5 Requirements for optical forward path transmitters . 52 Table 6 Data publication requirements for optic
31、al return path transmitters . 53 Table 7 Recommendations for optical return path transmitters 53 Table 8 Requirements for optical return path transmitters . 54 Table 9 Classification of optical receivers . 54 Table 10 Data publication requirements for optical receivers . 55 Table 11 Recommendations
32、for optical receivers 55 Table 12 Performance requirements for optical receivers 56 Table 13 Classification of optical amplifiers 56 Table 14 Performance requirements for optical amplifiers . 57 Table A.1 Parameters of optical amplifiers 58 6 60728-6 IEC:2011(E) INTERNATIONAL ELECTROTECHNICAL COMMIS
33、SION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 6: Optical equipment FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees)
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42、atsoever, 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 to the Normative references cited in this publication. Use of the referenced publ
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44、andard IEC 60728-6 has been prepared by technical area 5: Cable networks for television signals, sound signals and interactive services, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This third edition cancels and replaces the second edition published in 2003 of
45、which it constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition. The normative references were updated. The methods of measurement for optical power and return loss were substituted by references to other standards. Th
46、e method of measurement for polarization dependent loss was deleted. 60728-6 IEC:2011(E) 7 A method of measurement for carrier-to-crosstalk ratio (CCR) was added. The methods of measurement for CSO and CTB of optical amplifiers were substituted by a method of measurement for microscopic gain tilt of
47、 optical amplifiers. This parameter can be used for calculating the second order distortion of optical amplifiers according to the method described in the new Annex B. New classes for optical transmitters and receivers have been defined. The text of this standard is based on the following documents:
48、 CDV Report on voting 100/1654/CDV 100/1789/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The list of all the parts of the IE
49、C 60728 series, under the general title Cable networks for television signals, sound signals and interactive services, can be found on the IEC website. The committee has decided that the contents of this publication 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,
