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.652 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Optical fibre cables Characterist
2、ics of a single-mode optical fibre and cable Recommendation ITU-T G.652 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS
3、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.400G.449 COORDINATION OF RADIOTELEPHONY AND LIN
4、E 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 cables G.650G.659 Characteristics of optica
5、l 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 GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRAN
6、SMISSION 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.652 (11/2016) i Recommendation ITU-T G.652 Charact
7、eristics of a single-mode optical fibre and cable Summary Recommendation ITU-T G.652 describes the geometrical, mechanical and transmission attributes of a single-mode optical fibre and cable which has zero-dispersion wavelength around 1310 nm. The ITU-T G.652 fibre was originally optimized for use
8、in the 1310 nm wavelength region, but can also be used in the 1550 nm region. This is the latest revision of a Recommendation that was first created in 1984 and deals with some relatively minor modifications. This revision is intended to maintain the continuing commercial success of this fibre in th
9、e evolving world of high-performance optical transmission systems. Table 1 “G.652.A attributes“ and Table 3 “G.652.C attributes“ of the 2009 edition have not been changed and are not incorporated in this 2016 edition. These tables are still available in the 2009 edition of ITU-T G.652 Recommendation
10、. These optical fibres and cables can be used for systems with less stringent polarization mode dispersion (PMD) requirements (e.g., systems with short link lengths or those with high PMD tolerance). Table 2 “G.652.B attributes“ and Table 4 “G.652.D attributes“ of the 2009 edition have been maintain
11、ed with revisions in this 2016 edition, renumbered to Table 1 “G.652.B attributes“ and Table 2 “G.652.D attributes“. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.652 1984-10-19 11.1002/1000/4091 2.0 ITU-T G.652 1988-11-25 11.1002/1000/882 3.0 ITU-T G.652 1993-03-12 XV 1
12、1.1002/1000/883 4.0 ITU-T G.652 1997-04-08 15 11.1002/1000/4018 5.0 ITU-T G.652 2000-10-06 15 11.1002/1000/5183 6.0 ITU-T G.652 2003-03-16 15 11.1002/1000/6261 7.0 ITU-T G.652 2005-06-29 15 11.1002/1000/8522 8.0 ITU-T G.652 2009-11-13 15 11.1002/1000/10389 9.0 ITU-T G.652 2016-11-13 15 11.1002/1000/
13、13076 Keywords Dispersion un-shifted optical fibre, optical fibre and cable, single-mode optical fibre. _ * 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.int/11.1002/
14、1000/11830-en. ii Rec. ITU-T G.652 (11/2016) 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 permanen
15、t 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
16、 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 necessary standards
17、 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 Recommen
18、dation 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
19、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 a claimed Intell
20、ectual 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 received no
21、tice 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
22、 2017 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.652 (11/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this R
23、ecommendation . 2 4 Abbreviations and acronyms 2 5 Conventions 2 6 Fibre attributes 2 6.1 Mode field diameter . 2 6.2 Cladding diameter 3 6.3 Core concentricity error 3 6.4 Non-circularity . 3 6.5 Cut-off wavelength . 3 6.6 Macrobending loss 3 6.7 Material properties of the fibre . 4 6.8 Refractive
24、index profile 4 6.9 Longitudinal uniformity of chromatic dispersion . 4 6.10 Chromatic dispersion 4 7 Cable attributes . 5 7.1 Attenuation coefficient . 5 7.2 Polarization mode dispersion coefficient . 6 8 Tables of recommended values 6 Appendix I Information about cabled fibre link attributes used
25、for system design 10 I.1 Attenuation . 10 I.2 Chromatic dispersion 10 I.3 Differential group delay (DGD) . 11 I.4 Tables of common typical values . 11 I.5 Non-linear coefficient . 12 I.6 An example of statistical methodology 12 Appendix II Information on data collection of G.652.D fibre maximum/mini
26、mum chromatic dispersion for boundary line specification . 14 Bibliography. 16 Rec. ITU-T G.652 (11/2016) 1 Recommendation ITU-T G.652 Characteristics of a single-mode optical fibre and cable 1 Scope This Recommendation describes a single-mode optical fibre and cable which has zero-dispersion wavele
27、ngth around 1310 nm and can be used in the 1310 nm and 1550 nm regions. Both analogue and digital transmission can be used with this fibre. The geometrical, optical, transmission and mechanical parameters are described below in three categories of attributes: fibre attributes are those attributes th
28、at are retained throughout cabling and installation; cable attributes that are recommended for cables as they are delivered; link attributes that are characteristic of concatenated cables, describing estimation methods of system interface parameters based on measurements, modelling or other consider
29、ations. Information for link attributes and system design are in Appendix I. This Recommendation and the different performance categories found in the tables of clause 8 are intended to support the following related system Recommendations: Category Recommendations Characteristics of optical systems
30、b-ITU-T G.691, b-ITU-T G.692, b-ITU-T G.693, b-ITU-T G.695, b-ITU-T G.696.1, b-ITU-T G.698.1, b-ITU-T G.698.2, b-ITU-T G.698.3 Digital line systems b-ITU-T G.957, b-ITU-T G.959.1 Optical line systems for local and access networks b-ITU-T G.983.1, b-ITU-T G.984.2, b-ITU-T G.985, b-ITU-T G.986, b-ITU-
31、T G.987.2, b-ITU-T G.989.2 NOTE Depending on the length of the links, dispersion accommodation can be necessary for some b-ITU-T G.691, b-ITU-T G.692 or b-ITU-T G.959.1 application codes. The meaning of the terms used in this Recommendation and the guidelines to be followed in the measurement to ver
32、ify the various characteristics are given in ITU-T G.650.1 and ITU-T G.650.2. The characteristics of this fibre, including the definitions of the relevant parameters, their test methods and relevant values, will be refined as studies and experience progress. 2 References The following ITU-T Recommen
33、dations 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 there
34、fore 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 stand
35、-alone document, the status of a Recommendation. ITU-T G.650.1 Recommendation ITU-T G.650.1 (2010), Definitions and test methods for linear, deterministic attributes of single-mode fibre and cable. ITU-T G.650.2 Recommendation ITU-T G.650.2 (2015), Definitions and test methods for statistical and no
36、n-linear related attributes of single-mode fibre and cable. 2 Rec. ITU-T G.652 (11/2016) IEC 60793-2-50 IEC 60793-2-50 Ed. 5.0 (2015), Optical fibres Part 2-50: Product specifications Sectional specification for class B single mode fibres. ISO 80000-1 ISO 80000-1:2009, Quantities and units Part 1; G
37、eneral. 3 Definitions 3.1 Terms defined elsewhere For the purposes of this Recommendation, the definitions given in ITU-T G.650.1 and ITU-T G.650.2 apply. 3.2 Terms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: Ae
38、ff Effective Area DGD Differential Group Delay DWDM Dense Wavelength Division Multiplexing PMD Polarization Mode Dispersion PMDQ Statistical parameter for link PMD SDH Synchronous Digital Hierarchy WDM Wavelength Division Multiplexing 5 Conventions Values shall be rounded to the number of digits giv
39、en in the tables of recommended values before conformance is evaluated. The conventional rounding rule of “rounding half away from zero“ is used, which is described in Annex B, Rule B of ISO 80000-1. Only the first digit beyond the number of significant digits is used in determining the rounding. 6
40、Fibre attributes Only those characteristics of the fibre providing a minimum essential design framework for fibre manufacture are recommended in this clause. Ranges or limits on values are presented in the tables of clause 8. Of these, cable manufacture or installation may significantly affect the c
41、abled fibre cut-off wavelength and PMD. Otherwise, the recommended characteristics will apply equally to individual fibres, fibres incorporated into a cable wound on a drum and fibres in an installed cable. 6.1 Mode field diameter Both a nominal value and tolerance about that nominal value shall be
42、specified at 1310 nm. The nominal value that is specified shall be within the range found in clause 8. The specified tolerance shall not exceed the value in clause 8. The deviation from nominal shall not exceed the specified tolerance. Rec. ITU-T G.652 (11/2016) 3 6.2 Cladding diameter The recommend
43、ed nominal value of the cladding diameter is 125 m. A tolerance is also specified and shall not exceed the value in clause 8. The cladding deviation from nominal shall not exceed the specified tolerance. 6.3 Core concentricity error The core concentricity error shall not exceed the value specified i
44、n clause 8. 6.4 Non-circularity 6.4.1 Mode field non-circularity In practice, the mode field non-circularity of fibres having nominally circular mode fields is found to be sufficiently low that propagation and jointing are not affected. It is, therefore, not considered necessary to recommend a parti
45、cular value for the mode field non-circularity. It is not normally necessary to measure the mode field non-circularity for acceptance purposes. 6.4.2 Cladding non-circularity The cladding non-circularity shall not exceed the value found in clause 8. 6.5 Cut-off wavelength Two useful types of cut-off
46、 wavelength can be distinguished: a) cable cut-off wavelength cc; b) fibre cut-off wavelength c. NOTE For some specific submarine cable applications, other cable cut-off wavelength values may be required. The correlation of the measured values of c and cc depends on the specific fibre and cable desi
47、gn and the test conditions. While in general cc 4000 km link, where it is set to 25 km, the error probability level is 6.5 108. 12 Rec. ITU-T G.652 (11/2016) Table I.1 Representative values of concatenated optical fibre links Attenuation coefficient Wavelength region Typical link value (Note) 1260 n
48、m-1360 nm 0.5 dB/km 1530 nm-1565 nm 0.275 dB/km 1565 nm-1625 nm 0.35 dB/km Chromatic dispersion parameter D1550 17 ps/(nm km) S1550 0.056 ps/(nm2 km) NOTE Typical link value corresponds to the link attenuation coefficient used in b-ITU-T G.957 and b-ITU-T G.691. Table I.2 Differential group delay Ma
49、ximum PMDQ ps/ km Link length km Implied fibre induced maximum DGD ps Channel bit rates No specification Up to 2.5 Gbit/s 0.5 400 25.0 10 Gbit/s 40 19.0 (Note) 10 Gbit/s 2 7.5 40 Gbit/s 0.20 3000 19.0 10 Gbit/s 80 7.0 40 Gbit/s 0.10 4000 12.0 10 Gbit/s 400 5.0 40 Gbit/s NOTE This value applies also for 10 Gigabit Ethernet systems. I.5 Non-linear coefficient The effect of chromatic dispersion is interactive with the no
