IEC_TR_61282-16-2022.pdf

IEC TR 61282-16 Edition 1.0 2022-05 TECHNICAL REPORT Fibre optic communication system design guidelines Part 16:Coherent receivers and transmitters with high-speed digital signal processing IEC TR 61282-16:2022-05(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2022 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 Secretariat 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by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications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.IEC Products&Services Portal-products.iec.ch Discover our powerful search engine and read freely all the publications previews.With a subscription you will always have access to up to date content tailored to your needs.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 300 terminological entries in English and French,with equivalent terms in 19 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC TR 61282-16 Edition 1.0 2022-05 TECHNICAL REPORT Fibre optic communication system design guidelines Part 16:Coherent receivers and transmitters with high-speed digital signal processing INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.01 ISBN 978-2-8322-0094-0 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TR 61282-16:2022 IEC 2022 CONTENTS FOREWORD.6 INTRODUCTION.8 1 Scope.9 2 Normative references.9 3 Terms,definitions,and abbreviated terms.9 3.1 Terms and definitions.9 3.2 Abbreviated terms.9 4 Background.12 5 Coherent transmission of vector-modulated signals.13 5.1 Typical receiver architecture.13 5.2 Typical transmitter architecture.14 5.3 Vector-modulated signals.15 5.3.1 Mathematical description.15 5.3.2 Binary amplitude and phase modulation.16 5.3.3 Quadrature amplitude modulation.17 5.3.4 Polarization multiplexing.18 5.3.5 Higher-dimensional coding and constellation shaping.18 6 Coherent receiver architectures and functional capabilities.19 6.1 Basic principle of coherent detection.19 6.1.1 General.19 6.1.2 Homodyne and heterodyne detection.19 6.1.3 Intradyne detection.21 6.1.4 Polarization dependence.21 6.1.5 Frequency dependence.22 6.1.6 Phase and polarization diversity.22 6.2 Single coherent mixer with balanced detection.23 6.2.1 Principle of operation.23 6.2.2 Common-mode rejection.24 6.2.3 Polarization dependence.26 6.2.4 Homodyne detection.27 6.2.5 Heterodyne detection.28 6.3 Dual coherent mixer with phase diversity.29 6.3.1 Principle of operation.29 6.3.2 Intradyne detection with frequency offset removal.31 6.3.3 Compensation of chromatic dispersion.33 6.3.4 Compensation of I-Q skew and phase offset.40 6.3.5 Spectral shaping and frequency equalization.42 6.4 Quadruple mixer with phase and polarization diversity.46 6.4.1 Principle of operation.46 6.4.2 Polarization demultiplexing.48 6.4.3 Compensation of polarization-mode dispersion.51 6.4.4 Compensation of polarization-dependent loss and residual CD.53 6.4.5 Carrier phase recovery.54 6.4.6 Impact of laser phase noise.55 6.5 High-resolution spectral analysis with coherent receivers.62 6.5.1 Measurement methods.62 IEC TR 61282-16:2022 IEC 2022 3 6.5.2 Dual mixer with polarization diversity.63 6.5.3 Examples of high-resolution spectral analysis.64 7 Digital signal processing in coherent receivers.66 7.1 Basic features of digital signal processing.66 7.2 Real-time DSPs for fibre optic communication