1、 IEC 61755-2-4 Edition 1.0 2015-01 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Connector optical interfaces Part 2-4: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Non-angled for reference connection applications IEC 61
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11、csciec.ch. IEC 61755-2-4 Edition 1.0 2015-01 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Connector optical interfaces Part 2-4: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Non-angled for reference connection applicati
12、ons INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.20 ISBN 978-2-8322-2189-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 61755-2-4:2015 IEC 2015 CONTENTS FOREWORD
13、 . 3 1 Scope 5 2 Normative references 5 3 Performance grades 6 4 Description 6 5 Criteria for a fit within performance grades 7 5.1 General . 7 5.2 Attenuation grades and criteria . 7 6 Use of selected fibre to assemble reference connector plugs . 9 7 Reference adaptor . 9 8 Attenuation measurement
14、uncertainty contribution . 9 Annex A (informative) Example of determination of the attenuation measurement uncertainty 10 Figure 1 Representation of fibre core position of single connector plug under the assumption of worst case alignment with identical connector plug. 8 Figure A.1 Attenuation measu
15、rement uncertainty contribution for Grade 1 reference connectors 10 Table 1 Single-mode attenuation grades at 1 310 nm . 6 Table 2 Mode field diameter and fibre core nominal index of refraction for fibre to be used in reference connector plugs 7 Table 3 Measurement uncertainty contribution of refere
16、nce connectors . 9 IEC 61755-2-4:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS CONNECTOR OPTICAL INTERFACES Part 2-4: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Non-angled for refer
17、ence connection applications FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions conc
18、erning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). The
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26、nses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Atte
27、ntion is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61755-2-4 has been prepared by subcommittee 86B: Fibre optic interconne
28、cting devices and passive components, of IEC technical committee 86: Fibre optics. The text of this standard is based on the following documents: FDIS Report on voting 86B/3845/FDIS 86B/3866/RVD Full information on the voting for the approval of this standard can be found in the report on voting ind
29、icated in the above table. 4 IEC 61755-2-4:2015 IEC 2015 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 61755 series, published under the general title Fibre optic interconnecting devices and passive components Connector optical in
30、terfaces, can be found on the IEC website. Future standards in this series will carry the new general title as cited above. Titles of existing standards in this series will be updated at the time of the next edition. The committee has decided that the contents of this publication will remain unchang
31、ed until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a
32、 later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC 61755-2-4:2015 IEC 2015 5 FIB
33、RE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS CONNECTOR OPTICAL INTERFACES Part 2-4: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Non-angled for reference connection applications 1 Scope This part of IEC 61755 defines a set of prescribed conditio
34、ns that should be maintained in order to satisfy the requirements of non-angled polished reference connections. The prescribed conditions include dimensional limits and optical fibre requirements of the optical interface to meet specific requirements for reference connection (plugs and adaptors) use
35、d for attenuation measurements. Two different grades for reference connections are defined in this standard. The use of each of these grades depends on the application and on the targeted attenuation measurement uncertainty. The model uses a Gaussian distribution of light intensity over the specifie
36、d restricted mode field diameter (MFD) range. This standard is intended to be used for shipping and acceptance inspections. The reference connector plug is specified for B1.1, B1.3 and B6 fibres as specified in IEC 60793-2-50. The use of the reference connector plug would not be recommended where cl
37、assification of fibre is difficult, for example construction and maintenance of cable plant. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applie
38、s. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60793-2-50, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 61300-3-4, Fibre optic interconnecting devices and passive componen
39、ts Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation IEC 61300-3-42, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-42: Examinations and measurements Attenuation of single mode alignment sleeves and or a
40、daptors with resilient alignment sleeves IEC 61755-2-1, Fibre optic interconnecting devices and passive components Connector optical interfaces Part 2-1: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Non-angled 6 IEC 61755-2-4:2015 IEC 2015 IEC 61755-2-2, F
41、ibre optic interconnecting devices and passive components Connector optical interfaces Part 2-2: Connection parameters of non-dispersion shifted single-mode physically contacting fibres Angled IEC 61755-3 (all parts), Fibre optic interconnecting devices and passive components Connector opticla inter
42、faces Part 3-x: Connector parameters of non-dispersion shifted single-mode physically contacting fibres IEC TR 62627-04, Fibre optic interconnecting devices and passive components Technical report Part 04: Example of uncertainty calculation: Measurement of the attenuation of an optical connector 3 P
43、erformance grades Performance grades for PC polished reference connectors are given in Table 1. The specified attenuation for each grade is obtained when the reference plugs are connected to each other with the reference adaptor. Table 1 Single-mode attenuation grades at 1 310 nm Reference grade aAt
44、tenuation adB Contribution to measurement uncertainty bdB R1 0,1 0,1 R2 0,2 0,2 aUnder the assumption of worst case alignment with identical connector plug. Expected attenuation measured when connecting two plugs of the same grade may be higher due to significant measurement uncertainty. bAs describ
45、ed in Clause 8. 4 Description Optical reference connector plugs are connector plugs manufactured with restricted tolerances for dimensions relevant to lateral and angular offset. These connector plugs are used for attenuation measurement purposes according to IEC 61300-3-4, and shall be considered a
46、s part of the measurement set-up since they strongly contribute to its measurement uncertainty (for example see IEC TR 62627-04). The attenuation measurement uncertainty contributions for both grades of reference connectors are listed in Table 3. The principal performance of a reference connector pl
47、ug is given by its contribution to measurement uncertainty (estimated based on the reproducibility of an attenuation measurement of the same device performed using multiple different reference connector plugs of the same grade) which is determined by the accuracy with which the core of the optical f
48、ibre is aligned to the optical datum target and determines the random attenuation performance of a reference connector population. The main parameters influencing the performance of the reference connector plugs are fibre core location, fibre core axis angle and mode field diameter variability. Figu
49、re 1 represents the fibre alignment tolerances for the two different reference grades described in this standard, under the assumption of using selected reference fibre, described in Table 2. The design curves given in Figure 1 each represent maximum allowable combinations of a given specific fibre core location and an associated fibre core axis angle to not exceed the specified attenuation of any single considered connection. The design curves shown re
