1、TIA/EIA STANDARD ANSI/TIA/EIA-455-171A-2001 Approved: May 16, 2001 FOTP-171 Attenuation by Sub st itut ion Measurement for Short-Length Multimode Graded-Index and Single Mode Optical Fiber Cable Assemblies TIAIEIA-455-171A OJpgrade and Revision of TIAIEIA-455-171) JUNE 2001 TELECOMMUNICATIONS INDUST
2、RY ASSOCIATION Tlie Telecoininiiiiicatioiis Industry Association represents tlie Communications Sector of Eleeltronk Industiies Alliance Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N
3、OTICE TMIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandmgs between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum dela
4、y the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of TIA/EIA from manufacturing or selling products not codorming to such standards and Publications, nor shall the existence of such Standards and Publi
5、cations preclude their voluntary use by those other than TIA/EIA members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by TIA/EIA in accordance with the American National Standards Institute (ANSI) patent policy. By such actio% TMI
6、A does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility o
7、f the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal Nos. 458 1 and 458 1 - 1, formulated under the cognizance of the TIA FO-6.3 Subcommittee on Fiber Optic Interconnecti
8、ng Dervices.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION 200 1 Standards and Technology Department 2500 Wilson Boulevard Arlington, VA 2220 1 PRICE: Please refer to current Catalog of EIA ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING PUBLICATIONS or call Global Engineering Docum
9、ents, USA and Canada (1-800-854-7179) International (303-397-7956) All rights reserved Printed in U.S.A. Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Electronic Industries A
10、lliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TINEIA-45
11、5-1 71A FOTP-171 Attenuation By Substitution Measurement For Short Length Multimode Graded Index And Single-Mode Optical Fiber Cable Assemblies Contents 1 .I Intent 1 1.2 Test methods 1 1.2.1 Methods AI, A2, A3 - Concatenation test for cable assemblies with like or unlike connectors on each end usin
12、g launch cable and adapter of optional reference quality . 2 1.2.2 Methods BI, B2, B3 - Screening test for cable assemblies with like connectors on each end using reference quality launch connector and adapter and reference quality receive connector and adapter . 2 1.2.3 Methods CI, C2, C3 - Screeni
13、ng test for cable assemblies with unlike connectors on each end using reference quality launch connector and adapter and reference quality receive connector and adapter . 3 1.2.4 Methods DI, D2, D3 - Screening test for cable assemblies with a connector on only one end or for testing each connector i
14、ndividually on assemblies with like or unlike connectors on both ends using reference quality launch connector and adapter . 4 2 Normative Documents 5 3 APPARATUS . 5 3.1 Light source 5 3.1 .I Light source spectral characteristics 6 3.1.2 Multimode source output 3.1.3 Source stability . 3.1.3.1 Sour
15、ce monitoring equipment (Optional) . 6 3.1.4 Source power level . 6 3.2 Single-Mode and multimode cladding mode stripper 3.3 Single-Mode high order mode filter . 3.4 Multimode mode filter 7 3.5 Detection equipment 7 8 3.6 Reference components . 8 3.6.1 Reference quality launch cable . 8 3.6.2 Refere
16、nce quality receive cable 8 3.6.3 Special hybrid reference cable 4 SAMPLING AND SPECIMENS . 3.5.1 Large core/large numerical aperture (NA) receive cable 4.1 Sample 9 4.2 Specimen 9 4.3 Test sample length 4.4 Test sample deploy 5 PROCEDURES . 10 5.1 Methods AI, A2, A3 . 10 Concatenation test for cabl
17、e assemblies with like or unlike connectors on each end using launch cable 10 5.1 .I Establish zero reference level . 10 5.1.2 First cable assembly loss measurement . 11 5.1.3 First cable assembly loss calculation . 12 and adapter of optional reference quality I Copyright Electronic Industries Allia
18、nce Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TINEIA-455-1 7 1 A 5.1.4 Concatenated cable assembly loss measurement 5.1.5 Concatenated cable assembly loss calculation 5.1.6 Additional concatenations 13 5.1.7 Concatenated
19、cable assembly loss statistics . 13 5.2 Methods BI, B2, B3 Screening test for cable connector and adapter. reference quality receive connector and adapter 5.2.1 Establish zero r 5.2.2 Cable assembly loss measurement . 15 5.3 Methods CI, C2. C3 17 Screening test for cable assemblies with unlike conne
20、ctors on each end using reference quality launch connector and adapter. reference quality receive connector and adapter 17 5.3.1 Establish zero reference level . 17 5.3.2 Cable assembly loss measurement . 20 5.4 Methods DI. D2. D3 22 Screening test for cable assemblies with a connector on only one e
21、nd or for testing each individual connector of assemblies with like or unlike connectors on both ends using reference quality launch connector and adapter . 22 23 . 23 6 CALCULATIONS OR INTERPRETATION OF RESULTS 25 7 DOCUMENTATION 25 8 SPEC I FI CAT I ON I N FOR MAT I ON ANNEX A (Normative) A.l INTR
22、ODUCTION . 28 A.l . 1 Intent 28 A.l . 1 Test methods A.l . 1 . 1 Qualification A.l . 1 . 2 Qualification when starting with known reference components . 28 A.2 REFERENCE COMPONENT REQUIREMENTS . 29 A.2.1 Reference connector parameters 29 A.2.1 . 1 Ferrule outside dimension . 29 A.2.1.2 Connector end
23、 face geometry . 29 A.2.1.3 Polish length 29 A.2.1.4 Reference connector loss A.2.1.5 Fiber type . A.2.1.6 Additional parameters for angled connectors and non-cylindrical ferrule connectors (optional for non-angled cylindrical ferrule connectors) 29 A.2.1.6.1 Position of fiber hole in ferrule . 30 A
24、.2.1.6.2 Fiber diameter 30 A.2.1.6.3 Ferrule inside diameter exit angle A.2.1.6.4 Fiber core position A.2.1.6.5 Beam exit angle . 30 A.2.2 Recommended reference connector requirements . 30 A.2.2.1 Multim 5.4.1 Establish zero reference level 5.4.2 Cable assembly loss measur A.3 SAMPLING AND SPECIMENS
25、 . 31 A.3.1 Sample . 31 A.3.2 Specimen 31 A.4 PROCEDURES . 33 A.4.1 Qualification when starting without known reference components . 33 A.4.1 . 1 Two reference candidate method . 33 A.4.1 . 1 . 1 Zero reference level 33 A.4.1 . 1 . 2 First reference connection loss measurement 34 A.4.1 . 1 . 3 Addit
26、ional reference connection loss measurements . 34 II Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TINEIA-455-1 71A A.4.1 .I .4 Additional reference connection loss measurements with c
27、onnector and alignment sleeve rotation 35 A.4.1 .I .5 Reference connection loss calculation . 35 A.4.1.2 Large offset connector method 35 A.4.1.2.1 Zero reference level . 35 A.4.1.2.2 First large offset connection loss measurement 36 A.4.1 .2.3 Additional large offset connection loss measurements 36
28、 A.4.1.2.4 Additional large offset connection loss measurements with connector and alignment sleeve rotation 37 A.4.1.2.5 Large offset connect . 37 A.4.1.2.6 Zero reference level A.4.1.2.7 First reference conn A.4.1.2.8 Additional loss measurements 38 A.4.1.2.9 Additional reference connectio nts wit
29、h connector and alignment sleeve rotation 38 A.4.1.2.1 O Connection loss calculation . . 38 A.4.2 Qualification when starting with known reference comp A.4.2.1 Qualifying a reference . 39 A.4.2.2 Qualifying a reference adapter with known reference connectors . 41 ANNEX B (Informative) . . 43 .43 B.l
30、 IEC B.2 ITU-T . 43 . 111 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TINEIA-455-1 7 1 A FOREWORD (This Foreword is not part of this Standard.) This document comes from TIA Project N
31、o. 4725 and was formulated under the cognizance of TIA FO- 6.3, Subcommittee on Fiber Optic Interconnecting Devices. There are two annexes to this Standard. Annex A is normative and is considered part of this Standard and Annex B is informative and is not considered part of this Standard iv Copyrigh
32、t Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TINEIA-455-1 71A FOTP-171 ATTENUATION BY SUBSTITUTION MEASUREMENT FOR SHORT OPTICAL FIBER CABLE ASSEMBLIES LENGTH MULTIMODE GRADED INDEX AND SINGL
33、E-MODE 1 INTRODUCTION 1.1 Intent These test methods describe procedures for measuring the attenuation by substitution of short length multimode graded index and single-mode optical fiber cable assemblies. The cable assemblies have a connector on only one end of the cable (pigtail) or have connectors
34、 on both ends of the cable (patch cord). The connectors on the patch cord may be identical or different from each other. These tests are primarily used for multimode cables of 100 meters or less in length and for single-mode cables of any length. These tests primarily evaluate connector loss since t
35、he fiber loss is usually a small portion of the total loss. For those assemblies that are long enough for the fiber loss to be a significant portion of the loss, the fiber loss will have to be taken into account when specifying limits for the measured loss. It is important to emphasize that measurem
36、ent of the loss of a given cable assembly during a factory test will not necessarily be the same as a loss measurement of the same cable assembly in actual field use. The actual loss of the cable assembly depends on the properties of all of the mating components, the orientation of the components, a
37、nd the launch condition of the light as it enters the connection. In a factory test only the components that are part of the cable assembly to be tested are accessible. The connector(s) that will be mated to the cable assembly in actual field use are not. Even though factory loss measurements are no
38、t necessarily the same as loss measurements in actual field use, the concatenation test is presented here as a suitable alternative which provides an estimate of average system loss performance. NOTE - The results of this test method are not directly comparable with those of FOTP-34, which is an int
39、erconnection device insertion loss test. This FOTP tests cable assemblies and FOTP-34 tests a complete connection (splice, device, connector set, etc.) installed between two like fibers. 1.2 Test methods This FOTP contains twelve methods for testing connectorized cable assem blies. The methods are d
40、esignated AI, A2, A3, BI, B2, B3, CI, C2, C3, DI, D2, D3. The letter in the method designation differentiates the general test approach. The numerical 1 Copyright Electronic Industries Alliance Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without licens
41、e from IHS-,-,-TINEIA-455-1 7 1 A character indicates whether the test is for multimode with mode filter (1) or without mode filter (2), or single-mode (3). Note - Some of the following test method descriptions refer to systems with or without transient conditions. Transient conditions are present w
42、hen high order modes are propagating in the launch fiber. An overfilled launch condition will cause high order modes to be present in the launch fiber. If a cable assembly is tested using an overfilled launch condition the connection under test will pass the high order modes with more loss than the
43、lower order modes. Until the high order modes are filtered out, they will produce a transient effect on loss measurements. For a more detailed explanation see TIA/EIA-455-50B Annex A (I nform at ive). 1.2.1 Methods AI, A2, A3 - Concatenation test for cable assemblies with like or unlike connectors o
44、n each end using launch cable and adapter of optional reference quality 1.2.1 .I Method AI - Multimode with mode filter This concatenation test method provides an estimate of the expected performance of a group of multimode cable assemblies that will be used in systems where transient conditions are
45、 not present. An overfilled launch condition is used along with a mode filter which is included in the launch cable to produce restricted launch conditions (remove the transient conditions). The use of reference quality connectors and adapters for the launch cable is optional. 1.2.1.2 Method A2 - Mu
46、ltimode without mode filter This concatenation test method provides an estimate of the expected average loss of a group of multimode cable assemblies that will be used in systems where transient conditions are present. An overfilled launch condition is used without a mode filter. The use of referenc
47、e quality connectors and adapters for the launch cable is optional. 1.2.1.3 Method A3 - Single-Mode with high order mode filter before the cable assembly(s) under test This concatenation test is used to estimate the expected performance of single-mode cable assemblies when placed in a system environ
48、ment. A high order mode filter is included in the launch cable before the cable assembly(s) under test. The use of reference quality connectors and adapters for the launch cable is optional. 1.2.2 Methods BI, B2, B3 - Screening test for cable assemblies with like connectors on each end using referen
49、ce quality launch connector and adapter and reference quality receive connector and adapter 1.2.2.1 Method BI - Multimode with mode filter This method tests multimode cable assemblies with like connectors on each end that will be used in systems where transient conditions are not present. This method should be used to screen out product that is likely to produce a system loss above some 2 Copyright Electronic Industries Alliance Pr
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