1、 TIA STANDARD ANSI/TIA-455-176-A-2003 Approved: May 21, 2003 FOTP-176 IEC-60793-1-20 Optical Fibres Part 1-20: Measurement Methods and Test Procedures Fibre Geometry TIA-455-176-A (Revision of TIA/EIA-455-176) MAY 2003 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications indus
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23、and Canada 1-800-854-7179, International (303) 397-7956 FOREWARD With the adoption of international standard IEC 60793-1-20 (Optical Fibres Part 1-20: Measurement Methods and Test Procedures Fibre Geometry) TIA-455-176-A supercedes the current TIA-455-176 (FOTP-176 Method for Measuring Optical Fiber
24、 Cross-Sectional Geometry by Automated Grey-Scale Analysis). It replaces the following documents: (FOTP-29 Refractive Index Profile, Transverse Interference Method) (FOTP-43 Output Near-field Radiation Pattern Measurement of Optical Waveguide Fibers) (FOTP-44 Refractive Index Profile, Refracted Ray
25、Method) (FOTP-45 Method for Measuring Optical Fiber Geometry Using a Laboratory Microscope) (FOTP-58 Core Diameter Measurement of Graded-Index Optical Fibers) (FOTP-92 Optical Fiber Cladding Diameter and Noncircularity by Noncontacting Fizeau Interferometry) This action was taken under the cognizanc
26、e of the TIA FO-4.6 Subcommittee on Optical Fibers. Note: Theoretical numerical aperture, which is obtained from refractive index profile measurements, is considered as a fiber geometry attribute. 60793-1-20 IEC:2001 TIA-455-176-A CONTENTS 1 Scope 1 2 Normative references.1 3 Overview of method .1 4
27、 Definitions .2 5 Reference test method .3 6 Apparatus 3 7 Sampling and specimens .3 8 Procedure4 9 Calculations.4 10 Results 4 11 Specification information 4 Annex A (normative) Requirements specific to method A Refracted near-field .5 Annex B (normative) Requirements specific to method B Transvers
28、e interference . 10 Annex C (normative) Requirements specific to method C Near-field light distribution. 15 Annex D (normative) Requirements specific to method D Mechanical diameter 22 Figure A.1 Refracted near-field method Schematic diagram .6 Figure A.2 Typical arrangement of the refracted near-fi
29、eld test set.7 Figure B.1 Test apparatus . 10 Figure B.2 Refractive index profile Ring pattern 13 Figure C.1 Cross-sectional core diameter Near-field intensity scan, option 1 . 19 Figure C.2 Cross-sectional core diameter Near-field intensity scan, option 2 . 20 Figure C.3 Near-field intensity distri
30、bution in the region of the core-cladding boundary. 20 Figure D.1 Top view of a typical electronic micrometer system . 22 Table 1 Measurement methods2 i 60793-1-20 IEC:2001 TIA-455-176-A INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-20: Measurement methods and test procedures Fib
31、re geometry FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standa
32、rdization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory w
33、ork. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizatio
34、ns. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international 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
35、of recommendations for international use and are published in the form of standards, technical specifications, technical 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
36、International Standards transparently to the maximum extent possible in their national and regional standards. Any 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 it
37、s approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 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 ide
38、ntifying any or all such patent rights. International Standard IEC 60793-1-20 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This standard, together with the other standards in the IEC 60793-1-2X series, cancels and replaces the first edition o
39、f IEC 60793-1-2, of which it constitutes a technical revision. The text of this standard is based on the following documents: FDIS Report on voting 86A/685/FDIS 86A/724/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above ta
40、ble. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Annexes A, B, C and D form an integral part of this standard. ii60793-1-20 IEC:2001 TIA-455-176-A IEC 60793-1-2X consists of the following parts, under the general title: Optical fibres: Part 1-20: Measurement
41、methods and test procedures Fibre geometry Part 1-21: Measurement methods and test procedures Coating geometry Part 1-22: Measurement methods and test procedures Length measurement The committee has decided that the contents of this publication will remain unchanged until 2003. At this date, the pub
42、lication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. iii 60793-1-20 IEC:2001 TIA-455-176-A INTRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test procedures as they apply to optical fibres. Within the same series several different area
43、s 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-teristics parts 1-40 to 1-49: Measurement methods and test procedures for transmission a
44、nd optical characteristics parts 1-50 to 1-59: Measurement methods and test procedures for environmental characteristics. iv60793-1-20 IEC:2001 TIA-455-176-A OPTICAL FIBRES Part 1-20: Measurement methods and test procedures Fibre geometry 1 Scope This part of IEC 60793 establishes uniform requiremen
45、ts for measuring the geometrical characteristics of uncoated optical fibres. The geometrical characteristics of uncoated optical fibres are fundamental values and are necessary for carrying out subsequent procedures such as handling, splicing, connectorization, cabling and measurements. 2 Normative
46、references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61745, End-face image analysis pro
47、cedure for the calibration of optical fibre geometry test sets 3 Overview of method This standard gives four methods for measuring fibre geometry characteristics which are given in terms of the following parameters: cladding diameter; cladding non-circularity; core diameter (category A fibre only);
48、core non-circularity (category A fibre only); core-cladding concentricity error; theoretical numerical aperture (optional category A fibre only). 1 60793-1-20 IEC:2001 TIA-455-176-A Table 1 Measurement methods Method Characteristics covered Fibre category(ies) covered Former designation A Refracted
49、near-field All All A and B a, bIEC 60793-1-A1A B Transverse interference Core diameter, core non-circularity and theoretical numerical aperture All A bIEC 60793-1-A1BC Near-field light All but theoretical numerical aperture A1, A2, A3, all B cIEC 60793-1-A2 D Mechanical diameter Cladding diameter and cladding non-circularity only All dIEC 60793-1-A4aThe core diameter of single-mode fibres is not specified. bMeasurement of core diameter and the maximum theor
