ITU-T G.650.2-2015 SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and opti

pdf标准 ITU-T G.650.2-2015 SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and opti

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INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.650.2 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2015) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics – Optical fibre cables Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable CAUTION ! PREPUBLISHED RECOMMENDATION This prepublication is an unedited version of a recently approved Recommendation. It will be replaced by the published version after editing. Therefore, there will be differences between this prepublication and the published version. FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-T's purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some other obligatory language such as "must" and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU [had/had not] received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http://www.itu.int/ITU-T/ipr/.  ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Recommendation ITU-T G.650.2 Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable Summary Recommendation ITU-T G.650.2 contains definitions of the statistical and non-linear parameters of single mode fibre and cable. It also contains both reference test methods and alternative test methods for characterizing these parameters. This edition of the Recommendation removed the state of polarization (SOP) method (first alternative test method). Rec. ITU-T G.650.2 (08/2015) – Prepublished version 1 Recommendation ITU-T G.650.2 Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable 1 Scope This Recommendation contains definitions and test methods suitable mainly for factory measurements of the statistical and non-linear attributes of the single-mode optical fibres and cables described in [b-ITU-T G.652], [b-ITU-T G.653], [b-ITU-T G.654], [b-ITU-T G.655], [b-ITU-T G.656], and [b-ITU-T G.657]. These definitions and test methods are generally not appropriate for multimode fibre, such as that described in ITU-T Rec. G.651.1. Some of the test methods, when so indicated, may also be used to characterize discrete optical components, such as those described in [b-ITU-T G.671]. [b-ITU-T G.650.1] contains definitions and test methods for linear deterministic attributes. Methods to compensate for impairments caused by polarization mode dispersion can be found in [b-ITU-T G.666]. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text,

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