1、 TIA STANDARD FOTP-111 IEC-60793-1-34 Optical Fibres Part 1-34: Measurement Methods and Test Procedures Fibre Curl TIA-455-111-A (Revision of TIA/EIA-455-111) NOVEMBER 2003 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industr
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23、A. and Canada 1-800-854-7179, International (303) 397-7956 FOREWARD With the adoption of international standard IEC 60793-1-34 (Optical Fibres Part 1-34: Measurement Methods and Test Procedures Fibre Curl) TIA-455-111-A supercedes the current TIA/EIA-455-111 (FOTP-111 Procedure for the Measurement o
24、f Optical Fiber Curl). This action was taken under the cognizance of the TIA-FO-4.6 Subcommittee on Optical Fibers. IEC 60793-1-34 adopted as TIA-455-111-A iCONTENTS FOREWORD.ii INTRODUCTIONiv 1 Scope 1 2 Normative references .1 3 Apparatus.1 3.1 Fibre holding fixture.2 3.2 Fibre rotator 2 3.3 End m
25、easurement device.2 3.4 Computer (optional).2 4 Sample preparation 2 5 Procedure 2 5.1 Mounting of the fibre2 5.2 Rotation 2 5.3 Calculation 2 6 Fibre curl calculations.3 7 Results.3 8 Specification information.3 Annex A (normative) Fibre curl by side view microscopy .4 Annex B (informative) Fibre c
26、url by laser beam scattering.7 Annex C (informative) Derivation of the circular fiber curl model .9 Figure A.1 Schematic diagram for apparatus to measure fibre curl using an optical microscope5 Figure A.2 Schematic diagram for apparatus to measure fibre curl using a laser micrometer .6 Figure A.3 Sc
27、hematic diagram for apparatus to measure fibre curl while securing the sample in a ferrule 6 Figure B.1 Schematic diagram of optical curl by laser beam scattering8 IEC 60793-1-34 adopted as TIA-455-111-A iiINTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-34: Measurement methods and
28、test procedures Fibre curl 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 co
29、ncerning 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 participate in thi
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33、e 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 procedure
34、 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 held resp
35、onsible for identifying any or all such patent rights. International Standard IEC 60793-1-34 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 60793-1-3X series, cancels and replaces the
36、second edition of IEC 60793-1-3, of which it constitutes a technical revision. The text of this standard is based on the following documents: FDIS Report on voting 86A/668/FDIS 86A/692/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated
37、 in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 3. Annex A forms an integral part of this standard. Annexes B and C are for information only. IEC 60793-1-34 adopted as TIA-455-111-A iiiIEC 60793-1-3X consists of the following parts, under the ge
38、neral title: Optical fibres: Part 1-30: Measurement methods and test procedures: Fibre proof test Part 1-31: Measurement methods and test procedures: Tensile strength Part 1-32: Measurement methods and test procedures: Coating strippability Part 1-33: Measurement methods and test procedures: Stress
39、corrosion susceptibility Part 1-34: Measurement methods and test procedures: Fibre curl The committee has decided that the 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. IEC 60793
40、-1-34 adopted as TIA-455-111-A ivINTRODUCTION 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 grouped, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29: Measurement me
41、thods 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 and optical characteristics parts 1-50 to 1-59: Measurement methods and test procedures fo
42、r environmental characteristics. IEC 60793-1-34 adopted as TIA-455-111-A 1OPTICAL FIBRES Part 1-34: Measurement methods and test procedures Fibre curl 1 Scope This part of IEC 60793 establishes uniform requirements for the mechanical characteristic fibre curl or latent curvature, in uncoated optical
43、 fibres. Fibre curl has been identified as an important parameter for minimizing the splice loss of optical fibres when using passive alignment fusion splicers or active alignment mass fusion splicers. Two methods, presented in Annexes A and B respectively, are recognized for the measurement of fibr
44、e curl, in uncoated optical fibres: method A: side view microscopy; method B: laser beam scattering. The side view microscopy procedure measures the radius of curvature of an uncoated fibre by determining the amount of deflection that occurs as an unsupported fibre end is rotated about the fibres ax
45、is. The laser beam scattering procedure measures fibre curl in an optical fibre by laser beam scattering. By knowing the maximum deflection of the fibre and the overhang distance from the fibre fixture to the measurement point, the fibres radius of curvature can be calculated from a simple circular
46、model, the derivation of which is given in annex C. Both methods are applicable to types A1, A2, A3 and B optical fibres. Method A is the reference test method, used to resolve disputes. 2 Normative references None. 3 Apparatus An uncoated fibre end is mounted in a rotatable fixture so that the end
47、extends freely into space for a prescribed overhang distance, X. The fibre is rotated and the deviations in the position of the end from about a centre position are measured to obtain the maximum deflection distance, f. Details pertaining to the two methods are given in the relevant annex A or B. Co
48、mmon apparatus requirements are given below. IEC 60793-1-34 adopted as TIA-455-111-A 23.1 Fibre holding fixture Provide a fixture that holds the fibre on a constant axis at the holding position and allows the fibre to be rotated through 360. The fixture may be a v-groove holder such as a vacuum chuc
49、k or a fibre ferrule. If a ferrule is used, take care to ensure that the inside diameter is sized closely enough to the fibre diameter to minimize variability in the deflection measurements. 3.2 Fibre rotator Provide a device to grip and rotate the fibre through 360. The device may be manually operated, or may be driven by a rotational device such as a stepper motor. 3.3 End measurement device Provide an end measurement device according to either annex A or annex B. 3.4 Computer (optional) A computer may
