1、 TSB-149-2004 APPROVED: AUGUST 1, 2004 REAFFIRMED: JANUARY 29, 2014 TSB-149 August 2004Generic Workmanship Guidelines for Fiber Optic Connector Interoperability NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between m
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6、-RF1, formulated under the cognizance of the TIA TR-42 Telecommunications Cabling Systems, TR-42.13 Subcommittee on Passive Optical Devices and Fiber Optic Metrology). . Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Technology (b) there is no assurance that the Document will be approved by an
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19、TENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TSB-149iTSB-149Generic Workmanship Guidelines for Fiber Optic Connector InteroperabilityContentsForewordiii1 SCOPE 12 REFERENCES 22.1 Documents22.2 Optical Interface Terminology 42.3 Miscellaneous Terminology .4
20、3 LIMITATION OF SPECIFYING OPTICAL PERFORMANCE ONLY. 64 LIMITATION OF FOCIS DOCUMENTS . 75 RECOMMENDATIONS . 85.1 Physical Contact (PC) 95.2 Angled Physical Contact (APC).95.3 Non-Contact(NC)105.4 Flat Polish (FLAT)10Annex A 11TSB-149iiThis page left blank.TSB-149iiiTSB-149 (PN-3-0106)Generic Workma
21、nship Guidelines for Optical InteroperabilityForeword(This Foreword is informative only and is not part of this Standard.)From TIA Project No. 3-0106, formulated under the cognizance of TIA FO-4.3,Subcommittee on Interconnection Devices.There is an Annex in Visual End-Face Inspection Criteria.Key wo
22、rds: Fiber Optics, Insertion Loss, Return Loss, End-face Geometry,Interoperability.TSB-149ivThis page left blank.11 SCOPEThe purpose of this TSB is to provide generic guidelines for users and consumers of“industry standard” optical connectors as defined by the TIA-604-XXX series of FiberOptic Interm
23、ateability Connector Interface Standards (FOCIS) documents. Thisdocument is meant to supply guidance to end-users as to how to specify and verifythat terminated products complying to a particular FOCIS standard will perform asexpected regardless of: Manufacturer of the unterminated connectors Suppli
24、er of the terminated assemblies Different operators within the same supplierThe underlying issue is that specifying optical performance requirements is notenough. Without also specifying end-face profiles, the user can be faced with aproduct that passed specified insertion loss/return loss requireme
25、nts against a teststandard but performs quite differently when mated against other terminations. Inaddition, defining and requiring that the end-face profile be within some range isimportant for interconnect reliability.Various types of end-face profiles and recommended values for the most popularfe
26、rrule/fiber configurations are provided in this TSB. The values provided in thisdocument are derived from various resources, including the TelecommunicationsIndustry Association, Telcordia, NASA, and various connector manufactures. Forparticular application and/or particular combination of fiber/cab
27、le/connectorcombination, the user is directed to determine if other values or criteria are moreappropriate. In their absence, the default values would serve the requirements ofmost commercial applications.LIMITATIONS OF THIS DOCUMENTProducts manufactured to the guidelines of this TSB are considered
28、to representBest Commercial Practices. However, it is the responsibility of the user to determinethe suitability of a suppliers product and termination process to meet the usersservice environment. Environmental requirements and qualification are not thesubject of this TSB.22 REFERENCES2.1 Documents
29、ARINC Specification 628P6, February 2002.Cabin Equipment Interfaces, Part 6.Fiber Optic Cable Assembly General Specification.IEC 60874-19-1 (2003-01).Connectors for optical fibers and cables.Part 19-1: Fiber optic patch cord connector type SC-PC (floating duplex)Standard terminated on multimode fibe
30、r type A1a, A1b Detail specification.IEC 61300-3-4 Ed. 2.0 (2001-01).Fiber Optic interconnecting devices and passive components.Basic test and measurement procedure.Part 3-4: Examinations and measurements Attenuation.IEC 61300-3-6 Ed. 1.2 (1999-07).Fiber Optic interconnecting devices and passive com
31、ponents.Basic test and measurement procedure.Part 3-6: Examinations and measurements - Return Loss.IEC/PAS 61300-3-35 (2002-07).Fiber Optic interconnecting devices and passive components.Basic test and measurement procedure.Part 3-35: Examinations and measurements Fiber optic cylindrical connectoren
32、dface visual inspection.TELCORDIA GR-326-CORE, Issue 3, September 1999.Generic Requirements for Singlemode Optical Connectors and JumperAssemblies.TIA/EIA-455-8 (FOTP-8), May 2000.Measurement of Splice or Connector Loss and Reflectance Using an OTDR.TIA/EIA-455-34 (FOTP-34), November 1995.Interconne
33、ction Device Insertion Loss Test.TIA-455-78B (FOTP-78, IEC 60793-1-40), November 19, 2002.Optical Fibers Part 1-40: Measurement Methods and Test Procedures Attenuation.3TIA/EIA-455-107A (FOTP-107), March 1999.Determination of Component Reflectance or Link/System Return Loss Using a LossTest Set.TIA/
34、EIA-455-171A (FOTP-171), June 2001.Attenuation by Substitution Measurement-for Short-Length Multimode Graded-Indexand Singlemode Optical Fiber Cable Assemblies.TIA/EIA-526-14A (OFSTP-14), August 1998.Optical Power Loss Measurements Of Installed Multimode Fiber Cable Plant.TIA/EIA-568-B.3, March 2000
35、.Optical Fiber Cabling Components Standard.TIA/EIA-604, August 2000.Fiber Optic Connector Intermateability Standards (FOCIS).TIA/EIA-4920000-B, November 1997.Generic Specifications for Optical Fibers.42.2 Optical Interface TerminologyAPC: Angled Physical Contact. A type of connector end-finish in wh
36、ich theferrule/fiber assembly is convex polished at an angle from the perpendicular to thefiber axis. The angle of the polish is typically 8 degrees. An angled polish willgenerally produce better (higher) return loss performance than the traditional “straight”PC polish. Used in high performance sing
37、lemode applications such as broadband,CATV, high bandwidth analog, high bit rate digital and DWDM where ultra-high returnloss performance is required.PC: Physical Contact. A type of connector end-finish in the ferrule/fiber assembly isconvex polished parallel to the perpendicular of the fiber axis s
38、o that the fibers of twomating connectors will physically contact when mated. This is the popular standardfor most commercial digital transmission systems and mid-range military/aerospaceapplications, both multimode and singlemode.NC: Non-Fiber Contact. A variation of the PC interface in which the f
39、errule is convexpolished but the internal fiber is concave polished to deliberately produce anundercut. At the optical interface, the mating ferrules will physically contact but acontrolled airgap will exist between the mating fiber ends. Used in some olderavionics/aerospace applications. (Typical /
40、4 gap)FLAT: Flat Polish. A type of ferrule/fiber end-face where the end is purposely flatpolished. At the optical interface, the mating ferrules will physically contact, but contactof the fibers depends on the fiber undercut/protrusion and the degree to which theconnector end-faces are perpendicular
41、 to the fiber axis. This is the typical polishmethod for many multimode fiber products. Used in low data rate digital multimodefiber systems. (Gap /4)2.3 Miscellaneous TerminologyFOCIS: Fiber Optic Connector Intermateability StandardsA specific connector type is referred to as FOCIS-XXX where XXX is
42、 the assignednumber in the FOCIS series. The actual standards document for FOCIS-XXX isretrievable as TIA/EIA-604-XXX. For example, the FC connector is referred to asFOCIS-4 and the corresponding document standard is TIA/EIA-604-4FOTP: Fiber Optic Test ProceduresSpecific test procedures are generica
43、lly designated as FOTP-XXX where XXX is theassigned number in the FOTP series. The actual standards documents for aparticular FOTP-XXX is retrievable as TIA/EIA-455-XXX. For example, the basic testprocedure for measuring the attenuation of optical fiber cable assemblies is coveredis referred to as F
44、OTP-171 and the corresponding document standard is TIA/EIA-455-171A.5TSB: Technical Systems BulletinTechnical Systems Bulletins are official TIA publications, which are meant to beinformative references, but are not actual standards (FOTP, Generic Specifications,etc.). TSBs can take the form of appl
45、ication notes, technical publications, etc. Aspecific TSB is generically designated as TSB-XXX where XXX is the assignednumber in the TSB series. The actual standards document for a particular TSB-XXXretrievable as TIA/EIA-TSB-XXX.63 LIMITATION OF SPECIFYING OPTICAL PERFORMANCE ONLYFor most users, t
46、he standard basis of connector/cable assembly specification hasbeen the specification of optical performance only. Referencing two parametersspecifies the optical performance of fiber optic cable assembly: Insertion Loss/cable assembly loss. The forward power loss of an opticalconnection/cable assem
47、bly. Insertion loss is measured per FOTP-34 (Cut-backMethod), FOTP-171 (Substitution Method) or IEC 61300-3-4 Ed.2.0. Cableassembly loss is measured per FOTP-171 (Substitution Method), OFSTP-14(Installed cable assemblies) or IEC 61300-3-4 Ed.2.0. Reflectance/Return Loss. The reverse (or reflected po
48、wer loss) for an opticalconnection/cable assembly. Measured per FOTP-8 (OTDR Method), FOTP-107(OCWR Method) or IEC 61300-3-6 Ed.1.2.These optical performance parameters are usually measured in conjunction with theDevice Under Test (DUT) being connected to a Measurement-Quality test orReference Jumpe
49、r (MQJ). The applicable FOTPs provide some guidance on howthese MQJs are processed and verified. It is important to understand that unlessmeasurements are carried out against MQJs the resulting test results may be entirelyunrepeatable or unreproducible which is important when suppliers and end-users areboth testing the finished product. It has been found that the end-face profile on anMQJ should be controlled to produce reproducible results.The fact that end-face profile should be controlled on a MQJ to produce reproducibleresults supports the asserti
