IEC_TR_61282-5-2019.pdf

IEC TR 61282-5 Edition 2.0 2019-07 TECHNICAL REPORT Fibre optic communication system design guidelines Part 5:Accommodation and compensation of chromatic dispersion IEC TR 61282-5:2019-07(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2019 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,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 writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb infoiec.ch CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 67 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC TR 61282-5 Edition 2.0 2019-07 TECHNICAL REPORT Fibre optic communication system design guidelines Part 5:Accommodation and compensation of chromatic dispersion INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.01 ISBN 978-2-8322-7131-5 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TR 61282-5:2019 IEC 2019 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Terms,definitions and abbreviated terms.6 3.1 Terms and definitions.6 3.2 Abbreviated terms.6 4 Background.7 5 Impact of chromatic dispersion.8 5.1 Dependence on fibre type.8 5.2 Dispersion-unshifted fibres.8 5.3 Dispersion-shifted fibres.10 5.4 Pulse broadening.11 5.5 Pulse narrowing and signal peaking.13 5.6 Dispersion-limited transmission distance.14 6 Compensation and accommodation of dispersion.16 6.1 Passive dispersion compensation along the optical path.16 6.1.1 General.16 6.1.2 Dispersion compensating fibre.16 6.1.3 Chirped fibre Bragg grating.17 6.1.4 Etalon filter.18 6.2 Dispersion management.18 6.3 Accommodation of dispersion.20 6.4 Pre-distortion of the transmitted signal.20 6.5 Electrical accommodation in the receiver.21 6.6 Dispersion-assisted transmission.22 6.7 Mid-span spectral inversion.23 7 Passive dispersion compensator parameters.24 7.1 Compensated fibre length.24 7.2 Operating wavelength range.24 7.3 Chromatic dispersion.24 7.4 Dispersion slope.25 7.5 Insertion loss.25 7.6 Wavelength-dependent loss.25 7.7 Phase ripple.26 7.8 Reflectance.26 7.9 Polarization-mode dispersion.26 7.10 Polarization-dependent loss.27 7.11 Optical nonlinearity.27 7.12 Latency.27 8 Passive dispersion compensator applications.28 8.1 Unamplified fibre spans.28 8.2 Fibre links with in-line optical amplifiers.28 8.3 Multi-channel WDM transmission systems.29 8.4 Hybrid transmission systems.30 8.5 Multi-band WDM transmission systems.30 IEC TR 61282-5:2019 IEC 2019 3 9 System parameters for passive dispersion compensators.30 Bibliography.32 Figure 1 Range of the dispersion coefficient for B-652.D fibres.9 Figure 2 Distortions in a 10 Gbit/s NRZ signal at various amounts of CD.14 Figure 3 Summing the dispersions of a B-652 fibre and a DCF over the C-band.17 Figure 4 Reflectivity and time delay of an FBG-based PDC.18 Figure 5 Periodic dispersion map with span-by-span compensation.19 Figure 6 Transmitter for generating pre-compensated optical signals.21 Figure 7 Coherent optical receiv