1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T G.650.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2018) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Optical fibre cables Definition
2、s and test methods for linear, deterministic attributes of single-mode fibre and cable Recommendation ITU-T G.650.1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON T
3、O ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400
4、G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 General G.600G.609 Symmetric cable pairs G.610G.619 Land coaxial cable pairs G.620G.629 Submarine cables G.630G.639 Free space optical systems G.640G.649 Optical fibre
5、 cables G.650G.659 Characteristics of optical components and subsystems G.660G.679 Characteristics of optical systems G.680G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERI
6、C AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.650.1
7、(03/2018) i Recommendation ITU-T G.650.1 Definitions and test methods for linear, deterministic attributes of single-mode fibre and cable Summary Recommendation ITU-T G.650.1 contains definitions of the linear, deterministic parameters of single-mode optical fibres and cables. It also contains both
8、reference test methods and alternative test methods for characterizing these parameters. These test methods are suitable mainly for factory measurements of the linear, deterministic attributes of single-mode fibres and cables. Some of the test methods may also be used to characterize discrete optica
9、l components. The history of this Recommendation is as follows: 1993 Definitions and test methods were removed from single-mode fibre Recommendations such as Recommendation ITU-T G.652 and used to create the initial version of Recommendation ITU-T G.650. 1997 The second version of Recommendation ITU
10、-T G.650 added definitions and test methods for polarization mode dispersion and appendices I, II and III. The improved determination of cut-off wavelength (clause 5.3.1.3.4) was also added. 2000 The third version established reference and alternative test methods for polarization mode dispersion, m
11、odified the definitions and test methods for core concentricity error (clauses 3.4 and 5.2), and added clause 5.1.4 and appendices IV, V and VI. 2002 In order to facilitate maintenance, Recommendation ITU-T G.650 was divided into smaller Recommendations. Recommendation ITU-T G.650.2 contains definit
12、ions and test methods for statistical and non-linear attributes of single-mode fibre and cable. 2004 The second version of Recommendation ITU-T G.650.1 added a third alternative test method “Spectral attenuation modelling“ (clause 5.4.4) and new Appendix III “Example of a matrix model“. This materia
13、l has been moved from the single-mode fibre Recommendations into this Recommendation ITU-T G.650.1. In addition, chromatic dispersion fitting procedures have been added (Annex A). 2010 The third version of Recommendation ITU-T G.650.1 added the test method “Test methods for the macrobend loss“ (clau
14、se 5.6). Jumper cut-off wavelength has been deleted from clause 5.3. An additional description has been added in cut-off wavelength test method (clause 5.3.1.3.2). Equation 5-1 has been corrected. A detailed description has been added in proof test method (clause 5.7). Appendix II has been updated.
15、2018 The fourth version of Recommendation ITU-T G.650.1 added Appendix IV (from Amendment 1 published in 2012) to provide measurement procedures for coherent multipath interference (MPI). The interferometric technique for chromatic dispersion measurement has been deleted from clause 6.5 and moved to
16、 Appendix V. The description of measurement details for ITU-T G.657 fibre on MFD, cut-off wavelength and spectral attenuation tests has been improved. The RTM and ATM of cable cut-off wavelength measurement has been modified. An example of the interpolation method has been added in clause I.3. Equat
17、ion 6-1 has been corrected. ii Rec. ITU-T G.650.1 (03/2018) History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.650 1993-03-12 XV 11.1002/1000/879 2.0 ITU-T G.650 1997-04-08 15 11.1002/1000/4017 3.0 ITU-T G.650 2000-10-06 15 11.1002/1000/5182 4.0 ITU-T G.650.1 2002-06-29 15 11
18、.1002/1000/6072 4.0 ITU-T G.650.2 2002-06-29 15 11.1002/1000/6073 4.1 ITU-T G.650.1 (2002) Amd. 1 2003-03-16 15 11.1002/1000/6259 4.1 ITU-T G.650.2 (2002) Amd. 1 2003-03-16 15 11.1002/1000/6260 5.0 ITU-T G.650.1 2004-06-13 15 11.1002/1000/7319 5.0 ITU-T G.650.2 2005-01-13 15 11.1002/1000/7468 6.0 IT
19、U-T G.650.2 2007-07-29 15 11.1002/1000/9152 6.0 ITU-T G.650.1 2010-07-29 15 11.1002/1000/10868 6.1 ITU-T G.650.1 (2010) Amd. 1 2012-10-29 15 11.1002/1000/11767 6.2 ITU-T G.650.1 (2010) Cor. 1 2013-08-29 15 11.1002/1000/11981 7.0 ITU-T G.650.2 2015-08-13 15 11.1002/1000/12528 7.0 ITU-T G.650.1 2018-0
20、3-16 15 11.1002/1000/13516 Keywords Deterministic attributes, linear attributes, single-mode fibre characterization. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu
21、.int/11.1002/1000/11830-en. Rec. ITU-T G.650.1 (03/2018) iii 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-
22、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 ye
23、ars, 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-Ts purview, the nec
24、essary 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. Howev
25、er, 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
26、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 RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of
27、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
28、 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
29、.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. iv Rec. ITU-T G.650.1 (03/2018) Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 General definitions . 2 3.2 Mech
30、anical characteristics 2 3.3 Glass geometry characteristics . 3 3.4 Optical characteristics 3 3.5 Others . 6 4 Abbreviations and acronyms 6 5 Conventions 7 6 Test methods . 7 6.1 Test methods for the mode field diameter 7 6.2 Test methods for the cladding diameter, core concentricity error and cladd
31、ing non-circularity 14 6.3 Test methods for the cut-off wavelength 23 6.4 Test methods for attenuation 30 6.5 Test methods for chromatic dispersion . 42 6.6 Test methods for macrobend loss . 46 6.7 Test methods for proof testing 48 Annex A Chromatic dispersion fitting 53 A.1 General . 53 A.2 Definit
32、ion of equations and fitting coefficients 53 A.3 Fitting procedure 54 Appendix I Methods of cut-off wavelength interpolation 55 I.1 Limited negative error method . 55 I.2 Least squares method . 57 I.3 Example 57 Appendix II Test method for measuring longitudinal uniformity of chromatic dispersion ba
33、sed on the backscattering technique 58 II.1 General . 58 II.2 Test apparatus . 58 II.3 Measurement procedure . 59 II.4 Presentation of the results . 62 Appendix III Example of a matrix model . 63 Appendix IV Test methods for measuring coherent MPI in short optical fibre cables (jumpers) . 65 IV.1 Fi
34、rst test method: The narrowband ECL/PM technique . 65 IV.2 Second test method: The wideband LED/OSA technique . 68 Rec. ITU-T G.650.1 (03/2018) v Page IV.3 Third test method: The fibre stretching technique . 70 Appendix V The interferometric technique for chromatic dispersion measurement 74 V.1 Gene
35、ral . 74 V.2 Test apparatus . 74 Bibliography. 78 Rec. ITU-T G.650.1 (03/2018) 1 Recommendation ITU-T G.650.1 Definitions and test methods for linear, deterministic attributes of single-mode fibre and cable 1 Scope This Recommendation contains definitions and test methods suitable mainly for factory
36、 measurements of the linear, deterministic attributes of the single-mode optical fibres and cables described in ITU-T G.652, ITU-T G.653, ITU-T G.654, ITU-T G.655, ITU-T G.656 and ITU-T G.657. These definitions and test methods are generally not appropriate for multimode fibre, such as that specifie
37、d in ITU-T 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 ITU-T G.671. ITU-T G.650.2 contains definitions and test methods for statistical and non-linear attributes. 2 References The following ITU-T Recom
38、mendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are th
39、erefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a st
40、and-alone document, the status of a Recommendation. ITU-T G.650.2 Recommendation ITU-T G.650.2 (2015), Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable. ITU-T G.651.1 Recommendation ITU-T G.651.1 (2007), Characteristics of a 50/125 m multi
41、mode graded index optical fibre cable for the optical access network. ITU-T G.652 Recommendation ITU-T G.652 (2016), Characteristics of a single-mode optical fibre and cable. ITU-T G.653 Recommendation ITU-T G.653 (2010), Characteristics of a dispersion-shifted single-mode optical fibre and cable. I
42、TU-T G.654 Recommendation ITU-T G.654 (2016), Characteristics of a cut-off shifted single-mode optical fibre and cable. ITU-T G.655 Recommendation ITU-T G.655 (2009), Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable. ITU-T G.656 Recommendation ITU-T G.656 (2010),
43、Characteristics of a fibre and cable with non-zero dispersion for wideband optical transport. ITU-T G.657 Recommendation ITU-T G.657 (2016), Characteristics of a bending-loss insensitive single-mode optical fibre and cable. ITU-T G.671 Recommendation ITU-T G.671 (2012), Transmission characteristics
44、of optical components and subsystems. IEC 60793-1-1 IEC 60793-1-1 (2017), Optical fibres Part 1-1: Measurement methods and test procedures General and guidance. IEC 60793-1-30 IEC 60793-1-30 (2010), Optical fibres Part 1-30: Measurement methods and test procedures Fibre proof test. 2 Rec. ITU-T G.65
45、0.1 (03/2018) IEC 60793-1-42 IEC 60793-1-42 (2013), Optical fibres Part 1-42: Measurement methods and test procedures Chromatic dispersion. (Annex C, Differential phase shift test method.) IEC 60793-1-44 IEC 60793-1-44 (2011), Optical fibres Part 1-44: Measurement methods and test procedures Cut-off
46、 wavelength. IEC 60793-1-45 IEC 60793-1-45 (2017), Optical fibres Part 1-45: Measurement methods and test procedures Mode field diameter. IEC 60793-1-46 IEC 60793-1-46 (2001), Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance. IEC 60793-
47、1-47 IEC 60793-1-47 (2017), Optical fibres Part 1-47: Measurement methods and test procedures Macrobending loss. IEC 61745 IEC 61745 (2017), End-face image analysis procedure for the calibration of optical fibre geometry test sets. IEC 61746-1 IEC 61746-1 (2009), Calibration of optical time-domain r
48、eflectometers (OTDR) Part 1: OTDR for single mode fibres. 3 Definitions This Recommendation defines the following terms: 3.1 General definitions 3.1.1 alternative test method (ATM): A test method in which a given characteristic of a specified class of optical fibres or optical fibre cables is measur
49、ed in a manner consistent with the definition of this characteristic and gives results which are reproducible and relatable to the reference test method and to practical use. 3.1.2 cladding mode stripper: A device that encourages the conversion of cladding modes to radiation modes. 3.1.3 mode filter: A device designed to accept or reject a certain mode or modes. 3.1.4 reference test method (RTM): A test method in which a char
