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 L.404 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2017) SERIES L: ENVIRONMENT AND ICTS, CLIMATE CHANGE, E-WASTE, ENERGY EFFICIENCY; CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE P
2、LANT Passive optical devices Field mountable single-mode optical fibre connectors Recommendation ITU-T L.404 ITU-T L-SERIES RECOMMENDATIONS ENVIRONMENT AND ICTS, CLIMATE CHANGE, E-WASTE, ENERGY EFFICIENCY; CONSTRUCTION, INSTALLATION AND PROTECTION OF CABLES AND OTHER ELEMENTS OF OUTSIDE PLANT OPTICA
3、L FIBRE CABLES Cable structure and characteristics L.100L.124 Cable evaluation L.125L.149 Guidance and installation technique L.150L.199 OPTICAL INFRASTRUCTURES Infrastructure including node element (except cables) L.200L.249 General aspects and network design L.250L.299 MAINTENANCE AND OPERATION Op
4、tical fibre cable maintenance L.300L.329 Infrastructure maintenance L.330L.349 Operation support and infrastructure management L.350L.379 Disaster management L.380L.399 PASSIVE OPTICAL DEVICES L.400L.429 MARINIZED TERRESTRIAL CABLES L.430L.449 For further details, please refer to the list of ITU-T R
5、ecommendations. Rec. ITU-T L.404 (08/2017) i Recommendation ITU-T L.404 Field mountable single-mode optical fibre connectors Summary Recommendation ITU-T L.404 describes the main features of field mountable single-mode optical fibre connectors, defines requirements for their optical, mechanical and
6、environmental characteristics and lists the main test methods. Further, this Recommendation gives a general description of the basic principles of operation and of technologies of fabrication of field mountable single-mode optical fibre connectors. History Edition Recommendation Approval Study Group
7、 Unique ID* 1.0 ITU-T L.404 2017-08-13 15 11.1002/1000/13297 Keywords Field mountable, optical fibre connector, single-mode. * 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:/hand
8、le.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T L.404 (08/2017) 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 (I
9、TU-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 meets every four
10、 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-Ts purview, the
11、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 is voluntary. Ho
12、wever, 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“ and the negati
13、ve 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 RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use
14、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 Recommendation,
15、ITU had not 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 http:/www.
16、itu.int/ITU-T/ipr/. ITU 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 L.404 (08/2017) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 4 3.1 Terms defined elsewhere 4 3.2
17、Terms defined in this Recommendation . 4 4 Abbreviations and acronyms 5 5 Conventions 5 6 General information 5 7 Classification 5 7.1 Assembly types . 5 7.2 Fibre types 6 7.3 Cable types . 6 7.4 Fibre alignment system . 6 7.5 Fibre and ferrule end-face finish 6 7.6 Coupling mechanism 6 7.7 Compatib
18、ility 7 8 Performance criteria and test methods 7 8.1 Optical performance requirements . 7 8.2 Mechanical and environmental performance requirements 8 9 Connector identification . 13 Rec. ITU-T L.404 (08/2017) 1 Recommendation ITU-T L.404 Field mountable single-mode optical fibre connectors 1 Scope
19、This Recommendation covers field mountable single-mode connectors without an external fibre tail that are applied directly to the fibre by an installer in the field. The attachment of the fibre to this type of connector is fully inside the connector assembly (including the boot if present). Connecto
20、rs that include a fibre tail are covered by ITU-T L.402. This version of the Recommendation covers connectors with one fibre per ferrule or one fibre per connection. This Recommendation: gives classification and information on types of field mountable single-mode optical fibre connectors, and the ma
21、in requirements for their optical, mechanical and environmental characteristics; lists the main test methods of field mountable single-mode optical fibre connectors; gives a general description of the basic principles of operation and of technologies of fabrication of field mountable single-mode opt
22、ical fibre connectors. 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 other references
23、 are subject to revision; all 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 reference t
24、o a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.652 Recommendation ITU-T G.652 (2016), Characteristics of a single-mode optical fibre and cable. ITU-T G.653 Recommendation ITU-T G.653 (2010), Characteristics of a dispersion
25、-shifted single-mode optical fibre and cable. ITU-T G.654 Recommendation ITU-T G.654 (2016), Characteristics of a cut-off shifted single-mode optical fibre and cable. ITU-T G.655 Recommendation ITU-T G.655 (2009), Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable.
26、ITU-T G.656 Recommendation ITU-T G.656 (2010), Characteristics of a fibre and cable with non-zero dispersion for wideband optical transport. ITU-T G.657 Recommendation ITU-T G.657 (2016), Characteristics of a bending-loss insensitive single-mode optical fibre and cable. ITU-T G.671 Recommendation IT
27、U-T G.671 (2012), Transmission characteristics of optical components and subsystems. ITU-T L.402 Recommendation ITU-T L.402/L.36 (2015), Single-mode fibre optic connectors. 2 Rec. ITU-T L.404 (08/2017) IEC 60794-2-50 IEC 60794-2-50 (2008), Optical fibre cables Part 2-50: Indoor cables Family specifi
28、cation for simplex and duplex cables for use in terminated cable assemblies. IEC 61300-2-1 IEC 61300-2-1 (2009), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-1: Tests Vibration (sinusoidal). IEC 61300-2-2 IEC 61300-2-2 (2009), Fibre optic in
29、terconnecting devices and passive components Basic test and measurement procedures Part 2-2: Tests Mating durability. IEC 61300-2-4 IEC 61300-2-4 (1995), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-4: Tests Fibre/cable retention. IEC 61300-
30、2-5 IEC 61300-2-5 (2009), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-5: Tests Torsion. IEC 61300-2-6 IEC 61300-2-6 (2010), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-6: Tests Ten
31、sile strength of coupling mechanism. IEC 61300-2-7 IEC 61300-2-7 (2013), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-7: Tests Bending moment. IEC 61300-2-12 IEC 61300-2-12 (2009), Fibre optic interconnecting devices and passive components B
32、asic test and measurement procedures Part 2-12: Tests Impact. IEC 61300-2-17 IEC 61300-2-17 (2010), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-17: Tests Cold. IEC 61300-2-18 IEC 61300-2-18 (2005), Fibre optic interconnecting devices and pa
33、ssive components Basic test and measurement procedures Part 2-18: Tests Dry heat High temperature endurance. IEC 61300-2-19 IEC 61300-2-19 (2012), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-19: Tests Damp heat (steady state). IEC 61300-2-2
34、2 IEC 61300-2-22 (2007), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-22: Tests Change of temperature. IEC 61300-2-26 IEC 61300-2-26 (2006), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Par
35、t 2-26: Tests Salt mist. IEC 61300-2-27 IEC 61300-2-27 (1995), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-27: Tests Dust - Laminar flow. IEC 61300-2-33 IEC 61300-2-33 (2012), Fibre optic interconnecting devices and passive components Basic
36、 test and measurement procedures Part 2-33: Tests Assembly and disassembly of fibre optic mechanical splices, fibre management systems and closures. Rec. ITU-T L.404 (08/2017) 3 IEC 61300-2-46 IEC 61300-2-46 (2006), Fibre optic interconnecting devices and passive components Basic test and measuremen
37、t procedures Part 2-46: Tests Damp heat, cyclic. IEC 61300-2-50 IEC 61300-2-50 (2007), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-50: Tests Fibre optic connector proof test with static load - Singlemode and multimode. IEC 61300-3-3 IEC 613
38、00-3-3 (2009), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-3: Examinations and measurements Active monitoring of changes in attenuation and return loss. IEC 61300-3-6 IEC 61300-3-6 (2008), Fibre optic interconnecting devices and passive com
39、ponents Basic test and measurement procedures Part 3-6: Examinations and measurements Return loss. IEC 61300-3-7 IEC 61300-3-7 (2009), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of att
40、enuation and return loss of single mode components. IEC 61300-3-28 IEC 61300-3-28 (2012), Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-28: Examinations and measurements Transient loss. IEC 61300-3-34 IEC 61300-3-34 (2009), Fibre optic interc
41、onnecting devices and passive components Basic test and measurement procedures Part 3-34: Examinations and measurements Attenuation of random mated connectors. IEC 61754-1 IEC 61754-1 (2013), Fibre optic interconnecting devices and passive components Fibre optic connector interfaces Part 1: General
42、and guidance. IEC 61755-2-1 IEC 61755-2-1 (2006), Fibre optic connector optical interfaces Part 2-1: Optical interface standard single mode non-angled physically contacting fibres. IEC 61755-2-2 IEC 61755-2-2 (2006), Fibre optic connector optical interfaces Part 2-2: Optical interface standard singl
43、e mode angled physically contacting fibres. IEC 61755-3-1 IEC 61755-3-1 (2006), Fibre optic connector optical interfaces Part 3-1: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical full zirconia PC ferrule, single mode fibre. IEC 61755-3-2 IEC 61755-3-2 (2006), Fibre optic connector optical
44、 interfaces Part 3-2: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules for 8 degrees angled-PC single mode fibres. IEC 61755-3-5 IEC 61755-3-5 (2006), Fibre optic connector optical interfaces Part 3-5: Optical interface 2,5 mm and 1,25 mm diameter cylindrical PC comp
45、osite ferrule using Cu-Ni-alloy as fibre surrounding material, single mode fibre. IEC 61755-3-6 IEC 61755-3-6 (2006), Fibre optic connector optical interfaces Part 3-6: Optical interface 2,5 mm and 1,25 mm diameter cylindrical 8 degrees angled-PC composite ferrule using Cu-Ni-alloy as fibre surround
46、ing material, single mode fibre. IEC 61755-3-7 IEC 61755-3-7 (2009), Fibre optic connector optical interfaces Part 3-7: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical PC composite ferrule using titanium as fibre surrounding material, single mode fibre. 4 Rec. ITU-T L.404 (08/2017) IEC 61
47、755-3-8 IEC 61755-3-8 (2009), Fibre optic connector optical interfaces Part 3-8: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical 8 degrees angled-APC composite ferrule using titanium as fibre surrounding material, single mode fibre. 3 Definitions 3.1 Terms defined elsewhere This Recommend
48、ation uses the following terms defined elsewhere: 3.1.1 fusion splice ITU-T G.671. 3.1.2 mechanical splice ITU-T G.671. 3.1.3 optical connector ITU-T G.671. 3.1.4 optical splice ITU-T G.671. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 direct-mount
49、FMC: This type of FMC is mounted using tools for clamping or gluing (hot or cold), cleaving and polishing. There is no optical splice inside the connector body. 3.2.2 ferrule: Mechanical fixture, generally a rigid tube, used to confine the stripped end of an optical fibre. See IEC 61754-1. Figure 1 Ferrule based
