IEC_TR_61282-12-2016.pdf

IEC TR 61282-12 Edition 1.0 2016-02 TECHNICAL REPORT Fibre optic communication system design guides Part 12:In-band optical signal-to-noise ratio(OSNR)IEC TR 61282-12:2016-02(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 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 Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch 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 corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publications search-www.iec.ch/searchpub 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by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications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 also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 15 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 65 000 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 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:csciec.ch.IEC TR 61282-12 Edition 1.0 2016-02 TECHNICAL REPORT Fibre optic communication system design guides Part 12:In-band optical signal-to-noise ratio(OSNR)INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.01 ISBN 978-2-8322-3171-5 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TR 61282-12:2016 IEC 2016 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Terms and definitions.6 4 Background.8 4.1 General.8 4.2 Higher spectral density of signals.9 4.3 Spectral filtering in wavelength-routing elements.10 4.4 Transmission of signals with multiple subcarriers.11 5 In-band OSNR measurement with spectrally shaped noise.12 5.1 Measurement of in-band ASE noise.12 5.2 In-band OSNR definitions.13 5.2.1 Background.13 5.2.2 Spectrally integrated in-band OSNR.13 5.2.3 In-band OSNR from averaged noise power spectral density.14 5.2.4 In-band OSNR from maximal noise power spectral density.14 5.2.5 In-band OSNR for individual optical subcarriers.15 5.3 Spectral shaping of ASE noise.15 5.3.1 General.15 5.3.2 Case(a):ASE noise shaped outside of the signal spectrum.15 5.3.3 Case(b):ASE noise shaped within the signal spectrum.16 5.3.4 Case(c):ASE noise shaping in a ROADM network.17 6 Guidelines for using the definitions.19 6.1 General.19 6.2 Wavelength integration range.20 6.3 Spectral resolution.22 7 In-band OSNR penalties of filtered signals.25 7.1 Scope of simulations.25 7.2 Results for 43 Gbit/s RZ-DQPSK.26 7.3 Results for 128 Gbit/s PM NRZ-QPSK.31 7.4 Results for 10 Gbit/s NRZ-OOK.31 7.5 Observations.31 Bibliography.33 Figure 1 Optical power spectrum composed of a modulated signal and ASE noise.9 Figure 2 Optical power spectrum of 50-GHz spaced 40 Gbit/s RZ-DQPSK signals with significant spectral overlap.10 Figure 3 Optical power spectrum of 50-GHz spaced 10 Gbit/s NRZ-OOK signals after spectral filtering in ROADMs.11 Figure 4 Optical power spectrum of a 400 Gbit/s optical superchannel comprised of four very densely spaced 100 Gbit/s PM-QPSK signals.11 Figure 5 Power spectral density of a 10 Gbit/s signal with ASE noise that has been shaped by a relatively broad optical filter.16 Figure