1、 International Telecommunication Union ITU-T G.652TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2009) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Optical fibre cables Characteristics of a single-mode optical fibr
2、e 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 G.200G.299 INDIVIDUAL CHARACTERIS
3、TICS 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 LINE TELEPHONY G.450G.499 TRANSMISSI
4、ON 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.659Characteristics of optical components and subsystems G.660G
5、.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 TRANSMISSION MEDIA CHARACTERISTICS G.6
6、000G.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 (11/2009) i Recommendation ITU-T G.652 Characteristics of a single-mode optical
7、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 in the 1310 nm wavelength region,
8、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 the evolving world of high-performan
9、ce optical transmission systems. History Version Approval date Version 1 (10/1984) Version 2 (11/1988) Version 3 (03/1993) Version 4 (04/1997) Version 5 (10/2000) This revision includes the addition of tables for different levels of system support. Version 6 (03/2003) This revision clarified the nom
10、enclature for the different categories or fibre. Also, in accordance with the agreement on spectral band description, the upper limit of the L-band is changed from 16XX to 1625 nm. The attenuation characteristics for reduced water peak categories, (G.652.C and G.652.D) are generalized to a broad reg
11、ion from a single wavelength. PMD requirements are added for all categories and two categories have reduced limits (compared to 0.5 ps/ km ). For the macrobending test, mandrel diameter is reduced to 30 mm radius. As seen above, this Recommendation has evolved considerably over the years; therefore
12、the reader is warned to consider the appropriate version to determine the characteristics of already deployed product, taking into account the year of production. In fact, products are expected to comply with the Recommendation that was in force at the time of their manufacture, but may not fully co
13、mply with subsequent versions of the Recommendation. Version 7 (06/2005) Support of G.695 applications is noted. A clarification of the method of fitting chromatic dispersion coefficient values and their use is provided in 5.10, along with some text on use of the statistics of chromatic dispersion f
14、or system design. A clarification of the relationship of the PMDQof uncabled fibre to cabled fibre is provided in 6.2. In the tables of requirements: The uncabled fibre PMD line item is removed from the tables and the note on the requirement for uncabled fibre PMD is modified. The tolerance of MFD a
15、t 1310 nm is reduced. The maximum dispersion slope at the zero dispersion wavelength is reduced. The maximum concentricity error is reduced. The maximum macrobending loss is reduced. The wording for the water peak requirement in Tables 3 and 4 are modified to reflect a reference to the specification
16、 over the range vs the specification at 1310 nm. ii Rec. ITU-T G.652 (11/2009) 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 Standardiz
17、ation 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 m
18、eets 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
19、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 i
20、s 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“
21、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 i
22、nvolve 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 R
23、ecommendation, ITU had 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
24、 http:/www.itu.int/ITU-T/ipr/. ITU 2010 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 (11/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 2.1 Normative references 1 2.2 Informative referenc
25、es 2 3 Terms and definitions . 2 4 Abbreviations and acronyms 2 5 Fibre attributes 3 5.1 Mode field diameter . 3 5.2 Cladding diameter 3 5.3 Core concentricity error 3 5.4 Non-circularity . 3 5.5 Cut-off wavelength . 3 5.6 Macrobending loss 4 5.7 Material properties of the fibre . 4 5.8 Refractive i
26、ndex profile 4 5.9 Longitudinal uniformity of chromatic dispersion . 4 5.10 Chromatic dispersion coefficient 5 6 Cable attributes . 5 6.1 Attenuation coefficient . 5 6.2 Polarization mode dispersion coefficient . 6 7 Tables of recommended values 6 Appendix I Information for link attributes and syste
27、m design . 11 I.1 Attenuation . 11 I.2 Chromatic dispersion 11 I.3 Differential group delay (DGD) . 12 I.4 Non-linear coefficient . 12 I.5 Tables of common typical values . 12 Bibliography. 14 Rec. ITU-T G.652 (11/2009) 1 Recommendation ITU-T G.652 Characteristics of a single-mode optical fibre and
28、cable 1 Scope This Recommendation describes a single-mode optical fibre and cable which has zero-dispersion wavelength around 1310 nm and which is optimized for use in the 1310 nm wavelength region, and which can also be used in the 1550 nm region (where this fibre is not optimized). Both analogue a
29、nd 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 that are retained throughout cabling and installation; cable attributes that are recommen
30、ded 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 considerations. Information for link attributes and system design are in Appendix I. This Recom
31、mendation and the different performance categories found in the tables of clause 7 are intended to support the following related system Recommendations: ITU-T G.957. ITU-T G.691. ITU-T G.692. ITU-T G.693. ITU-T G.959.1. ITU-T G.695. NOTE Depending on the length of the links, dispersion accommodation
32、 can be necessary for some ITU-T G.691, ITU-T G.692 or 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 verify the various characteristics are given in ITU-T G.650.1 and ITU-T G.650.2. The characteristics of
33、 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 2.1 Normative references The following ITU-T Recommendations and other references contain provisions which, through reference in
34、 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 therefore encouraged to investigate the possibility of applying the most recent
35、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-alone document, the status of a Recommendation. ITU-T G.650.1 Recommendati
36、on ITU-T G.650.1 (2004), Definitions and test methods for linear, deterministic attributes of single-mode fibre and cable. 2 Rec. ITU-T G.652 (11/2009) ITU-T G.650.2 Recommendation ITU-T G.650.2 (2005), Definitions and test methods for statistical and non-linear related attributes of single-mode fib
37、re and cable. IEC 60793-2-50 IEC 60793-2-50 (2004), Optical fibres Part 2-50: Product specifications Sectional specification for class B single mode fibres. 2.2 Informative references ITU-T G.663 Recommendation ITU-T G.663 (2000), Application related aspects of optical amplifier devices and subsyste
38、ms. ITU-T G.691 Recommendation ITU-T G.691 (2003), Optical interfaces for single channel STM-64 and other SDH systems with optical amplifiers. ITU-T G.692 Recommendation ITU-T G.692 (1998), Optical interfaces for multichannel systems with optical amplifiers. ITU-T G.693 Recommendation ITU-T G.693 (2
39、005), Optical interfaces for intra-office systems. ITU-T G.695 Recommendation ITU-T G.695 (2005), Optical interfaces for coarse wavelength division multiplexing applications. ITU-T G.957 Recommendation ITU-T G.957 (1999), Optical interfaces for equipments and systems relating to the synchronous digi
40、tal hierarchy. ITU-T G.959.1 Recommendation ITU-T G.959.1 (2003), Optical transport network physical layer interfaces. IEC 60794-2-11 IEC 60794-2-11 (2005), Optical fibre cables Part 2-11: Indoor cables Detailed specification for simplex and duplex cables for use in premises cabling. 3 Terms and def
41、initions For the purposes of this Recommendation, the definitions given in ITU-T G.650.1 and ITU-T G.650.2 apply. Values shall be rounded to the number of digits given in the tables of Recommended values before conformance is evaluated. 4 Abbreviations and acronyms This Recommendation uses the follo
42、wing abbreviations and acronyms: AeffEffective Area DGD Differential Group Delay DWDM Dense Wavelength Division Multiplexing GPa GigaPascal PMD Polarization Mode Dispersion PMDQ Statistical parameter for link PMD SDH Synchronous Digital Hierarchy TBD To Be Determined WDM Wavelength Division Multiple
43、xing Rec. ITU-T G.652 (11/2009) 3 5 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 7. Of these, cable manufacture or install
44、ation may significantly affect the cabled 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. 5.1 Mode field diameter Both a nominal value and toleran
45、ce about that nominal value shall be specified at 1310 nm. The nominal value that is specified shall be within the range found in clause 7. The specified tolerance shall not exceed the value in clause 7. The deviation from nominal shall not exceed the specified tolerance. 5.2 Cladding diameter The r
46、ecommended nominal value of the cladding diameter is 125 m. A tolerance is also specified and shall not exceed the value in clause 7. The cladding deviation from nominal shall not exceed the specified tolerance. 5.3 Core concentricity error The core concentricity error shall not exceed the value spe
47、cified in clause 7. 5.4 Non-circularity 5.4.1 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
48、 a particular value for the mode field non-circularity. It is not normally necessary to measure the mode field non-circularity for acceptance purposes. 5.4.2 Cladding non-circularity The cladding non-circularity shall not exceed the value found in clause 7. 5.5 Cut-off wavelength Two useful types of
49、 cut-off 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 ccdepends on the specific fibre and cable design and the test conditions. While in general cc4000 km link, where it is set to 25 km, the error probability level is 6.5 108. Rec. ITU-T G.652 (11/2009) 13 Table I
