1、 TIA STANDARD ANSI/TIA-455-62-B-2003 Approved: May 21, 2003 FOTP-62 IEC-60793-1-47 Optical Fibres Part 1-47: Measurement Methods and Test Procedures Macrobending Loss TIA-455-62-B (Revision of TIA/EIA-455-62-A) MAY 2003 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications indu
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23、.A. and Canada 1-800-854-7179, International (303) 397-7956 FOREWARD With the adoption of international standard IEC 60793-1-47 (Optical Fibres Part 1-47: Measurement Methods and Test Procedures Macrobending Loss) TIA-455-62-B supercedes the current TIA-455-62-A (FOTP-62 Measurement of Optical Fiber
24、 Macrobend Attenuation). This action was taken under the cognizance of the TIA FO-4.6 Subcommittee on Optical Fibers. 60793-1-47 IEC:2001 TIA-455-62-B CONTENTS 1 Scope 1 2 Normative references.1 3 Reference test method .1 4 Apparatus 1 5 Sampling and specimens .2 6 Procedure2 7 Calculations.2 8 Resu
25、lts 3 9 Specification information 3 i60793-1-47 IEC:2001 TIA-455-62-B INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-47: Measurement methods and test procedures Macrobending loss FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standa
26、rdization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publis
27、hes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this
28、 preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an inter
29、national consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical specifications, tec
30、hnical reports or guides and they are accepted by the National Committees in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any
31、 divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its stand
32、ards. 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-47 has been prepared by subcommittee 86
33、A: Fibres and cables, of IEC technical committee 86: Fibre optics. This standard, together with the other standards in the IEC 60793-1-4X series, replaces the second edition of IEC 60793-1-4, of which it constitutes a technical revision. The text of this standard is based on the following documents:
34、 FDIS Report on voting 86A/676/FDIS 86A/700/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. IEC 60793-1-1 and IEC 60793-1-2 cov
35、er generic specifications. IEC 60793-1-4X consists of the following parts, under the general title: Optical fibres: ii60793-1-47 IEC:2001 TIA-455-62-B Part 1-40: Measurement methods and test procedures Attenuation Part 1-41: Measurement methods and test procedures Bandwidth Part 1-42: Measurement me
36、thods and test procedures Chromatic dispersion Part 1-43: Measurement methods and test procedures Numerical aperture Part 1-44: Measurement methods and test procedures Cut-off wavelength Part 1-45: Measurement methods and test procedures Mode field diameter Part 1-46: Measurement methods and test pr
37、ocedures Monitoring of changes in optical transmittance Part 1-47: Measurement methods and test procedures Macrobending loss Part 1-48: Measurement methods and test procedures Under consideration Part 1-49: Measurement methods and test procedures Under consideration The committee has decided that th
38、e contents of this publication will remain unchanged until 2003. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. iii60793-1-47 IEC:2001 TIA-455-62-B INTRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test proce
39、dures as they apply to optical fibres. Within the same series several different areas are grouped, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29: Measurement methods and test procedures for dimensions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical charac-teri
40、stics parts 1-40 to 1-49: Measurement methods and test procedures for transmission and optical characteristics parts 1-50 to 1-59: Measurement methods and test procedures for environmental charac-teristics. iv60793-1-47 IEC:2001 TIA-455-62-B OPTICAL FIBRES Part 1-47: Measurement methods and test pro
41、cedures Macrobending loss 1 Scope This part of IEC 60793 establishes uniform requirements for measuring macrobending sensitivity for category B1 to B4 single-mode optical fibres at 1 550 nm and of category A1 multimode fibres at 850 nm and 1 300 nm, thereby assisting in the inspection of fibres and
42、cables for commercial purposes. This standard gives two methods for measuring macrobending sensitivity: method A: power monitoring; method B: cut-back. Information common to both measurements is contained in clauses 1 to 8. 2 Normative references The following normative documents contain provisions
43、which, through reference in this text, constitute provisions of this part of IEC 60793. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60793 are encouraged to investigate the possibilit
44、y of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60793-1-40, Optical fibres Part 1-40:
45、 Measurement methods and test procedures Attenuation IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittance 3 Reference test method Under consideration. 4 Apparatus The apparatus consists of a mandrel with a diameter as stated
46、 in the detail specification (e.g. 60 mm or 75 mm for single-mode fibres and 75 mm for multimode fibres) and a loss-measurement instrument. Determine the macrobending loss at 1 550 nm, unless otherwise specified, by using either the power monitoring technique (method B of IEC 60793-1-46) or the cut-
47、back technique (method A of IEC 60793-1-40), taking care of the appropriate launch condition for the specific fibre type. 160793-1-47 IEC:2001 TIA-455-62-B 5 Sampling and specimens 5.1 Specimen length The specimen shall be a known length of fibre, as specified in the detail specification. 5.2 Specim
48、en end face Prepare a flat end face, orthogonal to the fibre axis, at the input and output ends of each test specimen. 6 Procedure Loosely wind the fibre on the mandrel, avoiding excessive fibre twist. The number of turns, mandrel diameter and wavelength at which loss is to be measured shall be as s
49、tated in the detail specification. The preferred values are number of turns: 100; mandrel diameter: 75 mm; wavelength: 1 550 nm for single-mode fibre and 1 300 nm for multimode fibre. NOTE Lost light can be reflected back into the fibre under test with reduced mandrel diameters (20 mm to 32 mm). This can cause artificial variations in the apparent loss vs. wavelength curve. With such reduced mandrel diameters, measuring loss vs. wavelength is recommended. A simple
