1、 International Telecommunication Union ITU-T G.654TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (10/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Optical fibre cables Characteristics of a cut-off shifted single-m
2、ode optical fibre and cable Recommendation ITU-T G.654 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 INDIVI
3、DUAL 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.450
4、G.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 and s
5、ubsystems 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 CHA
6、RACTERISTICS 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.654 (10/2012) i Recommendation ITU-T G.654 Characteristics of a cut-
7、off shifted single-mode optical fibre and cable Summary Recommendation ITU-T G.654 describes the geometrical, mechanical and transmission attributes of a single-mode optical fibre and cable which has the zero-dispersion wavelength around 1300 nm wavelength, and which is loss-minimized and cut-off wa
8、velength shifted at around the 1550 nm wavelength region. This is the latest revision of this Recommendation that was first created in 1988. Version 9.0 introduces category D ITU-T G.654 fibre in order to improve the optical signal to noise ratio (OSNR) characteristics, e.g., which can be applied to
9、 higher bit-rate submarine systems. It is intended to maintain the continuing commercial success of this fibre in the evolving world of high-performance optical transmission systems. History Edition Recommendation Approval Study Group 1.0 ITU-T G.654 1988-11-25 XV 2.0 ITU-T G.654 1993-03-12 XV 3.0 I
10、TU-T G.654 1997-04-08 15 4.0 ITU-T G.654 2000-10-06 15 5.0 ITU-T G.654 2002-06-29 15 6.0 ITU-T G.654 2004-06-13 15 7.0 ITU-T G.654 2006-12-14 15 8.0 ITU-T G.654 2010-07-29 15 9.0 ITU-T G.654 2012-10-29 15 ii Rec. ITU-T G.654 (10/2012) FOREWORD The International Telecommunication Union (ITU) is the U
11、nited 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 Recomm
12、endations 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 a
13、pproval 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 are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administ
14、ration“ 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 compl
15、iance 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 i
16、s 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 In
17、tellectual 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 notice of intellectual property, protected by patents, which may be required to implement this Recommendation.
18、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 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without th
19、e prior written permission of ITU. Rec. ITU-T G.654 (10/2012) iii Table of Contents Page 1 Scope 1 2 References. 2 3 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-of
20、f wavelength . 3 5.6 Macrobending loss 4 5.7 Material properties of the fibre . 4 5.8 Refractive index profile 5 5.9 Longitudinal uniformity of chromatic dispersion . 5 5.10 Chromatic dispersion coefficient 5 6 Cable attributes . 5 6.1 Attenuation coefficient . 5 6.2 Polarization mode dispersion (PM
21、D) coefficient . 6 7 Tables of recommended values 6 Appendix I Information for link attributes and system 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
22、. ITU-T G.654 (10/2012) 1 Recommendation ITU-T G.654 Characteristics of a cut-off shifted single-mode optical fibre and cable 1 Scope This Recommendation describes a single-mode optical fibre and cable which has the zero-dispersion wavelength around 1300 nm wavelength, which is loss-minimized and cu
23、t-off shifted at a wavelength around 1550 nm, and which is optimized for use in the 1530-1625 nm region. This very low loss cut-off shifted fibre (CSF) can be used for long-distance digital transmission applications such as long-haul terrestrial line systems and submarine cable systems using optical
24、 amplifiers. The geometrical, optical (attenuation, cut-off wavelength, chromatic dispersion and polarization mode dispersion, etc.), transmission and mechanical characteristics of this CSF are described below. Some provisions are made to support transmission at higher wavelengths up to 1625 nm. The
25、 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 recommended for cables as they are delivered; link attributes th
26、at are characteristics 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 given in Appendix I. This Recommendation, and the different performance categor
27、ies found in the tables of clause 7, are intended to support the following related-system Recommendations: b-ITU-T G.957; b-ITU-T G.691; b-ITU-T G.692; b-ITU-T G.959.1; b-ITU-T G.973; b-ITU-T G.973.1; b-ITU-T G.973.2; b-ITU-T G.977. The meaning of the terms used in this Recommendation, and the guide
28、lines to be followed in the measurements to verify 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 pro
29、gress. 2 Rec. ITU-T G.654 (10/2012) 2 References The following ITU-T Recommendations 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 oth
30、er references are subject to revision; users of this Recommendation are therefore 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 re
31、ference 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 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 Recommendat
32、ion ITU-T G.650.2 (2007), Definitions and test methods for 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 dig
33、its given in the table of recommended values before conformance is evaluated. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: CSF Cut-off Shifted Fibre DGD Differential Group Delay DWDM Dense Wavelength Division Multiplexing MFD Mode Field Diameter OSN
34、R Optical Signal to Noise Ratio PMD Polarization Mode Dispersion PMDQStatistical parameter for PMD link RTM Reference Test Method TBD To Be Determined WDM Wavelength Division Multiplexing Rec. ITU-T G.654 (10/2012) 3 5 Fibre attributes Only those characteristics of the fibre providing a minimum esse
35、ntial design framework for fibre manufacturers are recommended in this clause. Ranges or limits on values are presented in the tables of clause 7. Of these, cable manufacture or installation may significantly affect the cabled fibre cut-off wavelength and polarization mode dispersion (PMD). Otherwis
36、e, 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 tolerance about that nominal value of mode field diameter (MFD) shall be specified at 1550
37、nm. The nominal values of the MFD that is specified shall be within the range found in clause 7. The specified tolerance of the MFD shall not exceed the value in clause 7. The deviation from nominal shall not exceed the specified tolerance. 5.2 Cladding diameter The recommended nominal value of the
38、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 specified in clause 7. 5.4 Non-circ
39、ularity 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 a particular value for the mode
40、 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 cut-off wavelength can be disti
41、nguished: a) Cable cut-off wavelength, cc. b) Fibre cut-off wavelength, c. NOTE 1 For some specific submarine cable applications, other cable cut-off wavelength values may be required. The correlation of the measured values of cand ccdepends on the specific fibre and cable design and the test condit
42、ions. While in general, cc4000 12.0 10 Gbit/s 400 5.0 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, if set to 25 km, the probability level is 6.5 108. 14 Rec. ITU-T G.654 (10/2012) Bibliography
43、 b-ITU-T G.652 Recommendation ITU-T G.652 (2009), Characteristics of a single-mode optical fibre and cable. b-ITU-T G.663 Recommendation ITU-T G.663 (2011), Application related aspects of optical amplifier devices and subsystems. b-ITU-T G.691 Recommendation ITU-T G.691 (2006), Optical interfaces fo
44、r single channel STM-64 and other SDH systems with optical amplifiers. b-ITU-T G.692 Recommendation ITU-T G.692 (1998), Optical interfaces for multichannel systems with optical amplifiers. b-ITU-T G.957 Recommendation ITU-T G.957 (2006), Optical interfaces for equipments and systems relating to the
45、synchronous digital hierarchy. b-ITU-T G.959.1 Recommendation ITU-T G.959.1 (2012), Optical transport network physical layer interfaces. b-ITU-T G.973 Recommendation ITU-T G.973 (2010), Characteristics of repeaterless optical fibre submarine cable systems. b-ITU-T G.973.1 Recommendation ITU-T G.973.
46、1 (2009), Longitudinally compatible DWDM applications for repeaterless optical fibre submarine cable systems. b-ITU-T G.973.2 Recommendation ITU-T G.973.2 (2011), Multichannel DWDM applications with single channel optical interfaces for repeaterless optical fibre submarine cable systems. b-ITU-T G.9
47、77 Recommendation ITU-T G.977 (2011), 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
48、 IEC/TR 61282-3 (2006), Fibre optic communication system design guides Part 3: Calculation of link polarization mode dispersion. Printed in Switzerland Geneva, 2013 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network
49、operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and pr
