BS EN 62005-3-2001 Reliability of fibre optic interconnecting devices and passive optical components - Relevant tests for evaluating failure modes and failure mechanisms for passiv.pdf

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1、BRITISH STANDARD BS EN 62005-3:2001 Reliability of fibre optic interconnecting devices and passive components Part 3: Relevant tests for evaluating failure modes and failure mechanisms for passive components The European Standard EN 62005-3:2001 has the status of a British Standard ICS 33.180.20; 33

2、.180.99; 17.180.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 62005-3:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on

3、15 September 2001 BSI 07-2001 ISBN 0 580 38262 1 National foreword This British Standard is the official English language version of EN 62005-3:2001. It is identical with IEC 62005-3:2001. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommit

4、tee GEL/86/2, Interconnecting devices and passive components, which has the responsibility to: A list of organizations represented on this Subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance,

5、IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this d

6、ocument may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users o

7、f British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for c

8、hange, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17, and a back cover. The BSI copyright date displayed in thi

9、s document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 62005-3 NORME EUROPENNE EUROPISCHE NORM June 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Eur

10、opisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62005-3:2001 E ICS 33.180.20 English version Reliability of fibre optic

11、interconnecting devices and passive components Part 3: Relevant tests for evaluating failure modes and failure mechanisms for passive components (IEC 62005-3:2001) Fiabilit des dispositifs dinterconnexion et des composants passifs fibres optiques Partie 3: Essais significatifs pour lvaluation des mo

12、des et mcanismes de dfaillance des composants passifs (CEI 62005-3:2001) Zuverlssigkeit von LWL- Verbindungselementen und passiven Bauelementen Teil 3: Geeignete Prfverfahren zur Ermittlung von Ausfallmoden und Ausfallmechanismen von passiven Bauteilen (IEC 62005-3:2001) This European Standard was a

13、pproved by CENELEC on 2001-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such n

14、ational standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own lang

15、uage and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,

16、Spain, Sweden, Switzerland and United Kingdom.EN 50026-3:1002 - 2 - Foreword The text of document 86B/1439/FDIS, future edition 1 of IEC 62005-3, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote

17、 and was approved by CENELEC as EN 62005-3 on 2001-05-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-02-01 latest date by which the national standards conflicting wi

18、th the EN have to be withdrawn (dow) 2004-05-01 _ Endorsement notice The text of the International Standard IEC 62005-3:2001 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, add the following note after the title: NOTE All Internatio

19、nal Standards mentioned have been harmonized as European Standards. _ Page2 EN620053:2001 BSI07200162005-3 IEC:2001 3 CONTENTS Page Clause 1 Scope 4 2 Choice of relevant tests . 4 3 Typical failure points 4 4 Failure modes and known failure mechanisms . 4 5 Criteria for the choice of stress conditio

20、ns Step stress method . 5 Bibliography16 Figure 1 Choice of relevant tests. 6 Figure 2 Typical constituent parts and failure points 6 Table 1 Typical constituent parts and associated failure 7 Table 2 Failure mode and known failure mechanisms for passive optical components. 8 Page3 EN620053:2001 BSI

21、07200162005-3 IEC:2001 4 RELIABILITY OF FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS Part 3: Relevant tests for evaluating failure modes and failure mechanisms for passive components 1 Scope This part of IEC 62005 focuses on failure mechanisms associated with interconnecting devices an

22、d passive components. In order to estimate reliability by the acceleration testing described in IEC 62005-2, it is important to determine the dominant failure mechanism and the related test. This part of IEC 62005 introduces a choice of relevant tests from all the IEC 61300 series tests for each kno

23、wn failure mechanism and failure effects related to certain failure modes. (In IEC 62005-5, extension of severity depending on environmental category and performance request will be given.) 2 Choice of relevant tests Figure 1 shows the guidelines for the choice of relevant tests. At the first stage,

24、 relevant tests are selected by considering the device type of passive optical components. Then, at the second stage, relevant tests are refined by considering known failure mechanisms for each device. Each set of relevant tests for a particular device and for a particular known failure mechanism is

25、 obtained by this procedure. After that, suitable test conditions should be selected. 3 Typical failure points A typical passive optical component consists of different parts (the optical element, the package, the pigtail, joints, etc.) as shown in Figure 2. Each passive component exhibits failures

26、that can be referred to these parts and that can be common for a large class of devices: failure mode, failure mechanisms, failure effects; a set of relevant tests is shown in Table 1. Table 2 is more specific for each device type. 4 Failure modes and known failure mechanisms For any component under

27、 consideration, a potential failure mode and effect analysis (PFMEA) should be carried out. Table 2 shows selected relevant tests by the procedure of Figure 1 for known failure mechanism or failure effects for each type of commercially available and testable devices. It must be emphasized that the l

28、ist of known failure mechanisms and failure effects is not exhaustive. If new technology and new passive components become commercially available, they should be added to Table 2. Relevant tests are listed with the failure effect and the dominant known failure mechanism. As other relevant tests or m

29、ethods of failure mode excitation become known, these should also be added in a supplementary table and published. Page4 EN620053:2001 BSI07200162005-3 IEC:2001 5 5 Criteria for the choice of stress conditions Step stress method The severity and the duration of the test are the main sensitive points

30、 in reliability estimations. The severity indicated for the test by the references is mainly intended for quality evaluation and may be not sufficient for accelerated ageing tests. “Insufficient” means that failures or observable degradation may occur in an unacceptably long time (too low accelerati

31、on). On the other hand, the use of too high acceleration could result in failure mechanisms that are not typical for the devices in their usual operating environments. A feasible way to identify failure mechanisms and to establish bounds for the test severity is the step stress method: a significati

32、ve sample of devices, possibly after product screening, is aged at an increasing level of stress, starting from the operating conditions. Each testing condition is performed for a relatively short time (for instance 150 h); after that, temperature and/or humidity is increased. The severity increase

33、should be high enough to avoid “memory effects“ (ageing behaviour in one step is independent from ageing in the previous ones) but without causing an atypical failure mechanism (at least at the first steps). In some cases, the degradation rates are recorded at each step. It is possible to extrapolat

34、e a preliminary relationship between degradation with temperature and/or humidity. If the degradation rates of more severe conditions are not consistent with an extrapolated acceleration law, this can also mean that a new failure mechanism has been induced. The results of step stress testing can be

35、used to corroborate the results of the extended reliability assessment programme, but they cannot be considered as a conclusive reliability evaluation. Page5 EN620053:2001 BSI07200162005-3 IEC:2001 6 All tests Filter 1 Device type Filter 2 Known failure mechanism Set of relevant tests IEC 180/01 Fig

36、ure 1 Choice of relevant tests Butt joint Fibre to package interface Fusion splicing Connector Optical element Sealing Beam conversion system Receptacle joint IEC 181/01 Figure 2 Typical constituent parts and failure points Page6 EN620053:2001 BSI07200162005-3 IEC:2001 7 Table 1 Typical constituent

37、parts and associated failure Category Constitu- ent parts Failure mode Known failure mechanisms Failure effect Relevant test IEC reference Deterioration of adhesive Detachment of physical contact Fibre bending Fibre break Endface mechanical damage Endface break Vibration Shock Cold Dry heat Damp hea

38、t Temperature humidity cycle Change of temperature 61300-2-1 61300-2-9 61300-2-17 61300-2-18 61300-2-19 61300-2-21 61300-2-22 Rematable joint connector Insertion loss in- crease Reflection increase Particle contamination of endface Dust melt at high power transmission Maximum input power Dust 61300-

39、2-14 61300-2-27 Fatigue of latch Inability to mate Mechanical interface Recep- tacle joint Insertion loss in- crease Dust inserted Dust Vibration Shock Cold Dry heat Damp heat Temperature humidity cycle Change of temperature 61300-2-1 61300-2-9 61300-2-17 61300-2-18 61300-2-19 61300-2-21 61300-2-22

40、Fibre bending Fibre break Fusion splicing Insertion loss in- crease Reflection increase Refractive index change by stress Refractive index change Deterioration of adhesive Displacement of connection point Endface degradation Detachment of physical contact Fibre bending Fibre break Butt joint (fibre

41、to optical element) Insertion loss in- crease Reflection increase Deterioration of index matching material Change of refractive index Optical interface Beam conversion system Insertion loss in- crease Displacement Change of initial beam angle Hermetic seal Loss of hermeticity Deterioration of hermet

42、ic material Crack of hermetic seal Packaging Fibre to package interface Insertion loss in- crease Fibre bending Changing loss Vibration Shock Cold Dry heat Damp heat Temperature humidity cycle Change of temperature 61300-2-1 61300-2-9 61300-2-17 61300-2-18 61300-2-19 61300-2-21 61300-2-22 Page7 EN62

43、0053:2001 BSI072001260-503 EI:C0021 8 Table 2 Failure mode and known failure mechanisms for passive optical components Optical components Failure mode Known failure mechanisms Failure effect Relevant test IEC reference Deterioration of adhesive Displacement of connection point Endface degradation De

44、tachment of physical contact Insertion loss increase Fibre bending Fibre break Mechanical splice Reflection increase Deterioration of matching material Change of refractive index Insertion loss increase Fibre bending Fibre break Splices Fusion splice Reflection increase Refractive index change by st

45、ress Change of refractive index Vibration Retention Torsion/twist Bending moment Shock Torque strength Cold Dry heat Temperature humidity cycle Change of temperature Cable nutation Tensile strength 61300-2-1 61300-2-4 61300-2-5 61300-2-7 61300-2-9 61300-2-15 61300-2-17 61300-2-18 61300-2-21 61300-2-

46、22 61300-2-35 61300-2-6 Deterioration of adhesive Detachment of PC Fibre bending Fibre break Endface degradation Finish/polish, for example due to repeated mating/handling and/or scratches Fatigue of lock Inability to mate Loose screw Displacement of physical contact Vibration Mating durability Rete

47、ntion Torsion/twist Bending moment Shock Torque strength Cold Dry heat Temperature humidity cycle Change of temperature Cable nutation 61300-2-1 61300-2-2 61300-2-4 61300-2-5 61300-2-7 61300-2-9 61300-2-15 61300-2-17 61300-2-18 61300-2-21 61300-2-22 61300-2-35 Alignment sleeve crack Displacement of

48、physical contact Screen testing 61300-2-24 Connectors Insertion loss increase Reflection increase Unmatable Dust Dust melt at high power transmission Maximum input power Dust 61300-2-14 61300-2-27 Page8 EN620053:2001 BSI072001260-503 EI:C0021 9 Table 2 Failure mode and known failure mechanisms for p

49、assive optical components (continued) Optical components Failure mode Known failure mechanisms Failure effect Relevant test IEC reference Deterioration of adhesive Fused region break Insertion loss increase Reflection increase Refractive index change by stress Change of refractive index Splitting ratio change Refractive index change of fused fibre by stress Wavelength characteristics change Fused type PDL increase Ref