1、 International Telecommunication Union ITU-T G.653TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2010) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Optical fibre cables Characteristics of a dispersion-shifted, sing
2、le-mode optical fibre and cable Recommendation ITU-T G.653 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 IN
3、DIVIDUAL 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 LINE TELEPHONY G
4、.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.659Characteristics of optical components a
5、nd 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 TRANSMISSION MEDIA
6、 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.653 (07/2010) i Recommendation ITU-T G.653 Characteristics of a
7、dispersion-shifted, single-mode optical fibre and cable Summary Recommendation ITU-T G.653 describes the geometrical, mechanical and transmission attributes of a single-mode optical fibre and cable with zero-dispersion wavelength shifted into the 1550 nm wavelength region. This is the latest revisio
8、n of the Recommendation that was first created in 1988. This revision removes jumper cable cut-off wavelength definition and adds Notes allowing higher maximum cabled attenuation for short jumper cables. History Edition Recommendation Approval Study Group 1.0 ITU-T G.653 1988-11-25 2.0 ITU-T G.653 1
9、993-03-12 XV 3.0 ITU-T G.653 1997-04-08 15 4.0 ITU-T G.653 2000-10-06 15 5.0 ITU-T G.653 2003-12-14 15 6.0 ITU-T G.653 2006-12-14 15 7.0 ITU-T G.653 2010-07-29 15 ii Rec. ITU-T G.653 (07/2010) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the fi
10、eld 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 standardi
11、zing 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 covere
12、d by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts 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 indicat
13、e 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
14、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 PROP
15、ERTY 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 assert
16、ed by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that t
17、his 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 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. IT
18、U-T G.653 (07/2010) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 4 Abbreviations 2 5 Fibre attributes 2 5.1 Mode field diameter . 2 5.2 Cladding diameter 2 5.3 Core concentricity error 2 5.4 Non-circularity . 2 5.5 Cut-off wavelength . 3 5.6 Macrobending loss 3 5.7 Material properties
19、 of the fibre . 3 5.8 Refractive index profile 4 5.9 Longitudinal uniformity of chromatic dispersion . 4 5.10 Chromatic dispersion coefficient 4 6 Cable attributes . 5 6.1 Attenuation coefficient . 5 6.2 Polarization mode dispersion coefficient (PMD) . 5 7 Tables of recommended values 6 Appendix I I
20、nformation for link attribute and system design . 9 I.1 Attenuation . 9 I.2 Chromatic dispersion 9 I.3 Differential group delay (DGD) . 10 I.4 Non-linear coefficient . 10 I.5 Table of common typical values . 10 I.6 Chromatic dispersion coefficient limits for Table 2 . 11 Bibliography. 13 Rec. ITU-T
21、G.653 (07/2010) 1 Recommendation ITU-T G.653 Characteristics of a dispersion-shifted, single-mode optical fibre and cable 1 Scope This Recommendation describes a dispersion-shifted, single-mode optical fibre and cable which has a nominal zero-dispersion wavelength close to 1550 nm, and a dispersion
22、coefficient which is monotonically increasing with wavelength. This fibre is optimized for use in the 1550 nm region, but may also be used at around 1310 nm subject to the constraints outlined in this Recommendation. Some provisions are made to support transmission at higher wavelengths up to 1625 n
23、m and lower wavelengths down to 1460 nm. Chromatic dispersion coefficient values at these wavelengths may be specified to support coarse wavelength division multiplexing (CWDM) systems that do not have significant impairment due to non-linear effects. The geometrical, optical, transmission and mecha
24、nical 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 recommended for cables as they are delivered; link attributes that are characteristics of concatenated cables
25、, describing estimation method of system interface parameters based on measurements, modelling, or other considerations. Information for link attribute and system design are in Appendix I. This Recommendation, and the different performance categories found in the tables of clause 7, is intended to s
26、upport the following related system Recommendations: b-ITU-T G.957; b-ITU-T G.691; b-ITU-T G.692; b-ITU-T G.693; b-ITU-T G.959.1; b-ITU-T G.977; b-ITU-T G.695; b-ITU-T G.698.1. The meaning of the terms used in this Recommendation and the guidelines to be followed in the measurements to verify the va
27、rious characteristics are given in ITU-T G.650.1 and ITU-T G.650.2. The characteristic 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 Recommendations and
28、 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 therefore encour
29、aged 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-alone docu
30、ment, 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. 2 Rec. ITU-T G.653 (07/2010) ITU-T G.650.2 Recommendation ITU-T G.650.2 (2007), Definitions and test methods for
31、statistical and non-linear related attributes of single-mode fibre and cable. 3 Definitions 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 confor
32、mance is evaluated. 4 Abbreviations This Recommendation uses the following abbreviations: CWDM Coarse Wavelength Division Multiplexing DGD Differential Group Delay GPa GigaPascal PMD Polarization Mode Dispersion PMDQStatistical parameter for link PMD SDH Synchronous Digital Hierarchy TBD To be deter
33、mined WDM Wavelength Division Multiplexing 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 o
34、r installation 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 an
35、d tolerance about that nominal value shall be specified at 1550 nm. The nominal 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 Th
36、e recommended 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
37、specified 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 Rec. ITU-T G.653 (07/
38、2010) 3 necessary to recommend 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 specified in clause 7. 5.5 Cut-
39、off wavelength Two useful types of cut-off wavelength can be distinguished: a) cable cut-off wavelength cc; b) fibre cut-off wavelength c.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 12.0 10 Gbit/s 4
40、005.0 40 Gbit/sNOTE This value applies also for 10 Gigabit Ethernet systems. NOTE Cable section length is 10 km except for the 0.10 ps/km / 4000 km link, where it is set to 25 km, the probability level is 6.5 108. I.6 Chromatic dispersion coefficient limits for Table 2 The equations bounding the chr
41、omatic dispersion coefficient vs wavelength are specified by using the original “box-type“ specification for the dispersion coefficient, Dmax, min, max, 0min, 0maxand S0max. Maximum values between 0minof 1500 nm and maxof 1575 nm have been linked linearly from the zero dispersion at 1500 nm to the m
42、aximum dispersion, Dmax, of 3.5 ps/nm km at 1575 nm. The slope value of this line corresponds to 0.0467 ps/nm2 km. For wavelengths below 1500 nm, this line is extended with the same slope. Maximum values above 1575 nm have been added by drawing a line with a slope equal to the maximum slope, S0max,
43、of 0.085 ps/nm2 km. Minimum dispersion coefficient values have also been generated with a second pair of straight lines in the same manner. In Figure I.1 the solid lines are the limiting curves. The broken lines represent the original “box-type“ specification, in which absolute values of chromatic d
44、ispersion coefficient are lower than Dmaxof 3.5 ps/nm km between minof 1525 nm and maxof 1575 nm. The specification based on limiting curves for Table 2 is comparable to the original “box-type“ specification for Table 1. 12 Rec. ITU-T G.653 (07/2010) G.653(10)_FI.114601480 1500 1520 1540 1560 1580 1
45、600 16201086420246810Wavelength (nm)Chromaticdispersion (ps/nmkm)DmaxDmaxS0maxS0 max0minminmax0maxFigure I.1 Table 2 fibre dispersion boundary Rec. ITU-T G.653 (07/2010) 13 Bibliography b-ITU-T G.652 Recommendation ITU-T G.652 (2009), Characteristics of a single-mode optical fibre and cable. b-ITU-T
46、 G.663 Recommendation ITU-T G.663 (2000), Application related aspects of optical amplifier devices and subsystems. b-ITU-T G.691 Recommendation ITU-T G.691 (2006), Optical interfaces for single channel STM-64 and other SDH systems with optical amplifiers. b-ITU-T G.692 Recommendation ITU-T G.692 (19
47、98), Optical interfaces for multichannel systems with optical amplifiers. b-ITU-T G.693 Recommendation ITU-T G.693 (2009), Optical interfaces for intra-office systems. b-ITU-T G.695 Recommendation ITU-T G.695 (2009), Optical interfaces for coarse wavelength division multiplexing applications. b-ITU-
48、T G.698.1 Recommendation ITU-T G.698.1 (2009), Multichannel DWDM applications with single-channel optical interfaces. b-ITU-T G.957 Recommendation ITU-T G.957 (2006), Optical interfaces for equipments and systems relating to the synchronous digital hierarchy. b-ITU-T G.959.1 Recommendation ITU-T G.9
49、59.1 (2009), Optical transport network physical layer interfaces. b-ITU-T G.977 Recommendation ITU-T G.977 (2006), Characteristics of optically amplified optical fibre submarine cable systems. b-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. b-IEC/TR 61282-3 IEC/TR 61282-3 (2006), Fibre optic communication system de
