1、 International Telecommunication Union ITU-T G.671TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media and optical systems characteristics Characteristics of optical components and subsystems Transmission
2、characteristics of optical components and subsystems Recommendation ITU-T G.671 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
3、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.400G.449 COORDINATION OF RADIOTELEPHONY
4、 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 cables G.650G.659 Characteristics o
5、f optical components and subsystems G.660G.679Characteristics 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.19
6、99 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.671 (02/2012) i Recommendation ITU-T G.671
7、Transmission characteristics of optical components and subsystems Summary Recommendation ITU-T G.671 covers the transmission-related aspects of all types of optical components used in long-haul networks and access networks. A broad range of types of optical components is included in this Recommendat
8、ion. This Recommendation also includes transmission characteristics of optical components under the full range of operating conditions, but does not specify the operating service conditions, installation aspects or other aspects of components not affecting the optical transmission path. This Recomme
9、ndation also draws upon the relevant IEC definitions and test methods where applicable. History Edition Recommendation Approval Study Group 1.0 ITU-T G.671 1996-11-11 15 2.0 ITU-T G.671 2001-02-09 15 3.0 ITU-T G.671 2002-06-29 15 4.0 ITU-T G.671 2005-01-13 15 4.1 ITU-T G.671 (2005) Amd. 1 2006-03-29
10、 15 4.2 ITU-T G.671 (2005) Amd. 2 2006-12-14 15 4.3 ITU-T G.671 (2005) Amd. 3 2008-03-29 15 5.0 ITU-T G.671 2009-01-13 15 6.0 ITU-T G.671 2012-02-13 15 ii Rec. ITU-T G.671 (02/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of tele
11、communications, 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 standardizing teleco
12、mmunications 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 covered by the pr
13、ocedure 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 indicate both a te
14、lecommunication 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 when all of
15、 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 PROPERTY RIGHTS
16、 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 asserted by ITU m
17、embers 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 this may not
18、 represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2012 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.671 (
19、02/2012) iii Table of Contents Page 1 Scope 1 2 References. 2 3 Terms and definitions . 4 3.1 Terms defined elsewhere 4 3.2 Terms defined in this Recommendation . 4 4 Abbreviations and acronyms 22 5 Parameter test methods and values . 23 5.1 Optical add/drop multiplexer (OADM) subsystems (for WDM) .
20、 24 5.2 Asymmetric branching component (wavelength non-selective) 25 5.3 Optical attenuator . 26 5.4 Optical branching component (wavelength non-selective) 26 5.5 Optical branching component (wavelength non-selective) for PONs 27 5.6 Optical connector 30 5.7 Delay line interferometer 30 5.8 Dynamic
21、channel equalizer (DCE) . 31 5.9 Optical filter 31 5.10 Optical isolator . 32 5.11 Passive (chromatic) dispersion compensator 32 5.12 Single optical channel passive (chromatic) dispersion compensator . 33 5.13 Optical splice 33 5.14 Optical switch . 34 5.15 Optical termination . 35 5.16 Tuneable (ch
22、romatic) dispersion compensator . 35 5.17 Tuneable filter 35 5.18 Optical wavelength MUX/DMUX . 36 Rec. ITU-T G.671 (02/2012) 1 Recommendation ITU-T G.671 Transmission characteristics of optical components and subsystems 1 Scope The object of this Recommendation is to identify the transmission-relat
23、ed parameters for each of the components listed below and define the values of such parameters specifiable for each of the most relevant system applications. Where applicable, IEC definitions will be used. Applicable systems are anticipated to be covered by the following ITU-T Recommendations: Long-
24、haul terrestrial networks: networks using equipment with interfaces according to ITU-T G.957, and Recommendations of optical interfaces for single channel and multichannel systems with optical amplifiers including ITU-T G.691, ITU-T G.692 and ITU-T G.959.1. Access networks: networks using equipment
25、according to ITU-T G.982 and the ITU-T Recommendation of optical access networks to support services greater than the ISDN primary bit-rate (when published). This Recommendation covers optical components used in the optical networks described in the Recommendations above. Where possible, common para
26、meter values will be defined across all applications but, where necessary, specific values to each of the application groups may be given. This Recommendation covers the transmission characteristics in the various operating conditions of the following optical components (listed in alphabetical order
27、): optical add/drop multiplexer (OADM) subsystem; asymmetric branching component; optical attenuator; optical branching component (wavelength non-selective); optical connector; delay line interferometer; dynamic channel equalizer (DCE); optical filter; optical isolator; passive (chromatic) dispersio
28、n compensator; single optical channel passive (chromatic) dispersion compensator; optical splice; optical switch; optical termination; tuneable (chromatic) dispersion compensator; tuneable filter; optical wavelength multiplexer (MUX)/demultiplexer (DMUX); coarse WDM device; dense WDM device; wide WD
29、M device. 2 Rec. ITU-T G.671 (02/2012) This Recommendation does not cover: Installation aspects, service conditions and environmental and mechanical characteristics not affecting the optical transmission path of the various optical components. Specific details of test methods. According to an agreem
30、ent with IEC TC 86 and its subcommittees, the guidelines to be followed for the measurement of most of the parameters defined in clause 5 are given in the IEC 61300-3 series of transmission and geometric test methods. The tables in clause 5 indicate the recommended test methods, collecting the test
31、parameters into homogeneous groups and quoting for each group the relevant IEC basic specification number(s). 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 p
32、ublication, 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 edition of the Recommendations and other references listed below. A list o
33、f 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 Recommendation ITU-T G.650.1 (2004), Definitions and test methods for linear, determin
34、istic attributes of single-mode fibre and cable. ITU-T G.650.2 Recommendation ITU-T G.650.2 (2007), Definitions and test methods for statistical and non-linear related attributes of single-mode fibre and cable. ITU-T G.652 Recommendation ITU-T G.652 (in force), Characteristics of a single-mode optic
35、al fibre and cable. ITU-T G.653 Recommendation ITU-T G.653 (in force), Characteristics of a dispersion-shifted single-mode optical fibre and cable. ITU-T G.654 Recommendation ITU-T G.654 (2006), Characteristics of a cut-off shifted single-mode optical fibre and cable. ITU-T G.655 Recommendation ITU-
36、T G.655 (in force), Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable. ITU-T G.661 Recommendation ITU-T G.661 (2007), Definition and test methods for the relevant generic parameters of optical amplifier devices and subsystems. ITU-T G.662 Recommendation ITU-T G.662
37、 (2005), Generic characteristics of optical amplifier devices and subsystems. ITU-T G.691 Recommendation ITU-T G.691 (in force), 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 multichan
38、nel systems with optical amplifiers. ITU-T G.693 Recommendation ITU-T G.693 (2006), Optical interfaces for intra-office systems. ITU-T G.694.1 Recommendation ITU-T G.694.1 (2002), Spectral grids for WDM applications: DWDM frequency grid. ITU-T G.694.2 Recommendation ITU-T G.694.2 (2003), Spectral gr
39、ids for WDM applications: CWDM wavelength grid. Rec. ITU-T G.671 (02/2012) 3 ITU-T G.698.1 Recommendation ITU-T G.698.1 (2006), Multichannel DWDM applications with single-channel optical interfaces. ITU-T G.957 Recommendation ITU-T G.957 (2006), Optical interfaces for equipments and systems relating
40、 to the synchronous digital hierarchy. ITU-T G.959.1 Recommendation ITU-T G.959.1 (in force), Optical transport network physical layer interfaces. ITU-T G.982 Recommendation ITU-T G.982 (1996), Optical access networks to support services up to the ISDN primary rate or equivalent bit rates. ITU-T G.9
41、83.1 Recommendation ITU-T G.983.1 (2005), Broadband optical access systems based on Passive Optical Networks (PON). ITU-T G.983.3 Recommendation ITU-T G.983.3 (2001), A broadband optical access system with increased service capability by wavelength allocation. ITU-T G.984.2 Recommendation ITU-T G.98
42、4.2 (2003), Gigabit-capable Passive Optical Networks (GPON): Physical Media Dependent (PMD) layer specification. IEC 60869-1 IEC 60869-1 (1999), Fibre optic attenuators Part 1: Generic specification. IEC 60875-1 IEC 60875-1 ed. 5.0 (2010), Fibre optic interconnecting devices and passive components N
43、on-wavelength-selective fibre optic branching devices Part 1: Generic specification. IEC 60876-1 IEC 60876-1 ed.4 (2012), Fibre optic interconnecting devices and passive components Fibre optic spatial switches Part 1: Generic specification. IEC 61202-1 IEC 61202-1 ed. 3.0 (2009), Fibre optic interco
44、nnecting devices and passive components Fibre optic isolators Part 1: Generic specification. IEC 61300-3-2 IEC 61300-3-2 (1999), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-2: Examination and measurements Polarization dependent loss in a si
45、ngle-mode fibre optic device. IEC 61300-3-2a IEC 61300-3-2 ed. 3.0 (2009), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-2: Examination and measurements Polarization dependent loss in a single-mode fibre optic device. IEC 61300-3-4 IEC 61300-
46、3-4 (2001), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation. 4 Rec. ITU-T G.671 (02/2012) IEC 61300-3-6 IEC 61300-3-6 (2005), Fibre optic interconnecting devices and passive components Basic test and
47、 measurement procedures Part 3-6: Examinations and measurements Return loss. IEC 61300-3-7 IEC 61300-3-7 (2004), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return lo
48、ss. IEC 61300-3-19 IEC 61300-3-19 (1997), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-19: Examinations and measurements Polarization dependence of return loss of a single-mode fibre optic component. IEC/TR 61931 IEC/TR 61931 (1998), Fibre o
49、ptic Terminology. 3 Terms and definitions 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Recommendation Most of the definitions of parameters specified in this Recommendation, for each of the above-mentioned passive components, are given in the corresponding IEC generic specification. Where IEC definitions are used, they are noted as such. Additional parameters under
