1、 TECHNICAL REPORT IECTR 60728-6-1 First edition2006-12 Cable networks for television signals,sound signals and interactive services Part 6-1:System guidelines for analogue optical transmission systems Reference number IEC/TR 60728-6-1:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL US
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8、ail:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TECHNICAL REPORT IECTR 60728-6-1 First edition2006-12 Cable networks for television signals,sound signals and interactive serv
9、ices Part 6-1:System guidelines for analogue optical transmission systems PRICE CODE IEC 2006 Copyright-all rights reserved No part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writin
10、g from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch X For price,see current catalogueCommission Electrotechnique InternationaleInternational Elect
11、rotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 TR 60728-6-1 IEC:2006(E)CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms,definitions,symbols and abbreviations.7 3.1 Symbols.7 3.2 Ab
12、breviations.7 4 Topologies used for optical transmission systems in cable networks.8 4.1 Point-to-point system.8 4.2 Point-to-multi-point system.8 4.3 Multi-point-to-point system.9 4.4 Real wavelength division multiplex system.10 4.5 Combinations.10 5 Influences of equipment and fibre parameters on
13、the system performance.10 6 Optical modulation index.11 6.1 Single wavelength system.12 6.2 WDM systems.13 6.3 Choosing the right input level at the transmitter.13 7 Carrier-to-noise ratio.14 7.1 Short-haul links with a single transmitter.14 7.2 Long-haul point-to-point link.15 7.3 Multiple transmit
14、ter systems(WDM).16 7.4 Transmission systems with optical fibre amplifier.16 8 Linearity.17 8.1 Composite second order(CSO).18 8.2 Composite triple beat(CTB).20 9 Flatness.21 10 Output level.21 Annex A(informative)Brillouin scattering in optical fibres.22 Annex B(informative)Noise sources of optical
15、 transmission systems.24 Annex C(informative)Non-linear distortion in optical transmission systems.29 Bibliography.44 Figure 1 Point-to-point system.8 Figure 2 Point-to-multi-point system.9 Figure 3 Multipoint-to-point system.9 Figure 4 Real wavelength division multiplex system.10 Figure 5 Definitio
16、n of OMI for an optical transmitter.12 Figure C.1 Distortion of Volterra series expansion.30 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.TR 60728-6-1 IEC:2006(E)3 Figure C.2 Weighted second-and third-order distortion repartition for the 42 carriers frequency allocation map defined in Table C.1 of IEC 60728-3(software window capture).31 Figure C.3 Polarization-mode dispersion in single-mode fibre.33 Figure C.4 Static curve of a
