1、TIA455.20ADOPTION NOTICETIA455.20, “Measurement Methods and Test Procedures-Monitoringof Changes in Optical Transmittance (IEC-60793-1-46 OpticalFibers Part 1-46)“, was adopted on 24-Feb-2009 for use by theDepartment of Defense (DoD). Proposed changes by DoD activitiesmust be submitted to the DoD Ad
2、opting Activity: Defense SupplyCenter, Columbus, Attn: DSCC-VAT, P. O. Box 3990,Columbus, Ohio 43218-3990. Copies of this document may bepurchased from the IHS International Inc., 15 Inverness WayEast, Englewood, Co 80112, phone 800/525-7052 orhttp:/.Reviewer Activities: Air Force - 19Army - TENavy
3、- EC, MC, SHNOTE: The activities above were interested in this document asof the date of this document. Since organizations andresponsibilities can change, you should verify the currency ofthe information above using the ASSIST Online database athttps:/assist.dla.mil.FSC 60GPCustodians:Army - CRNavy
4、 - ASAir Force - 85DLA - CCAdopting Activity:DLA - CC(Project 60GP-2009-002)Source: http:/ - Downloaded: 2013-08-14T12:26ZCheck the source to verify that this is the current version before use.TIA-455-20-B (Revision of TIA-455-20-A) May 2004FOTP-20 IEC 60793-1-46: Optical Fibres- Part 1- 46: Measure
5、ment Methods and Test Procedures- Monitoring of Changes in Optical Transmittance ANSI/TIA-455-20-B-2004 APPROVED: MAY 13, 2004 REAFFIRMED: APRIL 4, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufactu
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26、 THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. IEC 60793-1-46 adopted as TIA-455-20-B iCONTENTS 1 Scope 1 2 Normative references 1 3 Reference test method 1 4 Apparatus 1 5 Sampling and specimens . 2 6 Procedure . 2 7 Calculations 2 8 Results 2 9 Spe
27、cification information . 3 Annex A (normative) Requirements specific to method A Change in transmittance by transmitted power 4 Annex B (normative) Requirements specific to method B Change in transmittance by backscattering. 7 Figure A.1 Measurement of change in optical transmittance using reference
28、 specimen 5 Figure A.2 Measurement of change in optical transmittance using stabilized source 5 IEC 60793-1-46 adopted as TIA-455-20-B iiIEC 60793-1-46 adopted as TIA-455-20-B iiiINTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-46: Measurement methods and test procedures Monitoring
29、of changes in optical transmittance 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 que
30、stions concerning standardization 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 participa
31、te in this preparatory work. 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 bet
32、ween the two organizations. 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
33、 produced have the form 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
34、 undertake to apply IEC 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
35、procedure to indicate its 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
36、held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-46 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 60793-1-4X series, replaces the sec
37、ond edition of IEC 60793-1-4, of which it constitutes a technical revision. The text of this standard is based on the following documents: FDIS Report on voting 86A/675/FDIS 86A/699/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in
38、 the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. Annexes A and B form an integral part of this standard. IEC 60793-1-1 and IEC 60793-1-2 cover generic specifications. IEC 60793-1-46 adopted as TIA-455-20-B ivIEC 60793-1-4X consists of the followi
39、ng parts, under the general title: Optical fibres: Part 1-40: Measurement methods and test procedures Attenuation Part 1-41: Measurement methods and test procedures Bandwidth Part 1-42: Measurement methods and test procedures Chromatic dispersion Part 1-43: Measurement methods and test procedures Nu
40、merical 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 procedures Monitoring of changes in optical transmittance Part 1-47: Measurement methods and test proc
41、edures 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 the contents of this publication will remain unchanged until 2003. At this date, the publication will
42、be reconfirmed; withdrawn; replaced by a revised edition, or amended. IEC 60793-1-46 adopted as TIA-455-20-B vINTRODUCTION 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 areas are groupe
43、d, 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 characteristics parts 1-40 to 1-49: Measurement methods and test procedures for transmission and optical ch
44、aracteristics parts 1-50 to 1-59: Measurement methods and test procedures for environmental characteristics. IEC 60793-1-46 adopted as TIA-455-20-B viIEC 60793-1-46 adopted as TIA-455-20-B 1OPTICAL FIBRES Part 1-46: Measurement methods and test procedures Monitoring of changes in optical transmittan
45、ce 1 Scope This part of IEC 60793 establishes uniform requirements for the monitoring of changes in optical transmittance, thereby assisting in the inspection of fibres and cables for commercial purposes. This standard gives two methods for monitoring the changes in optical transmittance of optical
46、fibres and cables that occur during mechanical or environmental testing, or both. It provides a monitor in the change of optical transmission characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope: method A: change in transmittance by transmit
47、ted power; method B: change in transmittance by backscattering. Methods A and B apply to the monitoring of all categories of the following fibres: class A: multimode fibres; class B: single-mode fibres. Information common to both measurements is contained in clauses 1 to 8, and information pertainin
48、g to each individual method appears in annexes A, and B respectively. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions
49、of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility 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: Measurem
