EN 61755-1-2006 en Fibre optic connector optical interfaces Part 1 Optical interfaces for single mode non-dispersion shifted fibres - General and guidance (Incorporating corrigendu.pdf

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1、BRITISH STANDARDBS EN 61755-1:2006Incorporating corrigendum no. 1Fibre optic connector optical interfaces Part 1: Optical interfaces for single mode non-dispersion shifted fibres General and guidanceThe European Standard EN 61755-1:2006 has the status of a British StandardICS 33.180.20g49g50g3g38g50

2、g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61755-1:2006This British Standard was published under the authority of the Standards Policy and Strategy Com

3、mittee on 31 May 2006 BSI 2007ISBN 0 580 48308 8National forewordThis British Standard was published by BSI. It is the UK implementation of EN 61755-1:2006, incorporating corrigendum December 2006. It is identical with IEC 61755-1:2005.The UK participation in its preparation was entrusted by Technic

4、al Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Interconnecting devices and passive components.A list of organizations represented on GEL/86/2 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are r

5、esponsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date Comments16920 Corrigendum No. 128 February 2007 Change to EN foreword and addition of Annex ZA.EUROPEAN STANDARD EN 61755-1 NORME E

6、UROPENNE EUROPISCHE NORM March 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in

7、 any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61755-1:2006 E ICS 33.180.20 Incorporating corrigendum December 2006English version Fibre optic connector optical interfaces Part 1: Optical interfaces for single mode non-dispersion shifted fibres - General and guidance

8、Interfaces optiques avec connecteurs pour fibres optiques Partie 1: Interfaces optiques pour fibres monomodales dispersion non dcale - Gnralits et lignes directrices Optische Schnittstellen von Lichtwellenleiter-Steckverbindern Teil 1: Optische Schnittstellen von nicht-dispersionsverschobenen Einmod

9、enfasern - Allgemeines und Leitfaden This European Standard was approved by CENELEC on 2006-02-01. 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.

10、Up-to-date lists and bibliographical references concerning such national 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 translati

11、on under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France,

12、 Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 86B/2217/FDIS, future edition 1 of IEC 61755-1, prepared

13、by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61755-1 on 2006-02-01. The following dates were fixed: latest date by which the EN has to be implemented at national lev

14、el by publication of an identical national standard or by endorsement (dop) 2006-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61755-1

15、:2005 was approved by CENELEC as a European Standard without any modification. _ EN 61755-1:2006 2 3 EN 61755-1:2006 CONTENTS Introduction 4 1 Scope 6 2 Normative references .6 3 Terms and definitions .6 4 Document structure 8 5 Datum target 9 6 Test methods .9 7 Optical interface grades9 8 Key para

16、meters10 9 Materials 12Bibliography .13 Figure 1Relationship between optical interface standards and interface standards.5 Figure 2 Lateral offset and angular misalignment versus attenuation for a typical non-dispersion shifted single mode fibre .11 Figure 3 High index layer refractive index and thi

17、ckness versus return loss for a typical non-dispersion shifted single mode fibre 11 Table 1 Multi-part document structure 8 Table 2 Single mode attenuation grades at 1 310 nm and 1 550 nm (dB) 10 Table 3 Single mode return loss grades at 1 310 nm and 1 550 nm (dB).10 Table 4 Examples of allowable en

18、d face condition versus return loss single mode fibre .12 Annex ZA (normative) Normative references to international publications with their corresponding European publications .14 EN 61755-1:2006 4 Introduction 0.1 Overview An optical interface standard is a multi-part collection of the physical an

19、d mechanical requirements necessary in order to comply with the optical functionality specifications for a defined interface between two optical fibres. It consists of those essential features that are functionally critical to the optical attenuation and return loss performance of an optical interfa

20、ce in the mated condition. This standard provides general information on singlemode optical interfaces, defining the location of the fibre core in relation to the datum target and the following key parameters: lateral offset, end face separation, end face angle, end face high index layer condition.

21、It also defines standardised test methods where appropriate. The subsequent parts of this series contain those optical interfaces that have been standardised for international use. Each interface contains the essential information to ensure that products conforming to the standard will work together

22、 repeatedly to a known level of optical performance without the need for compatibility testing or cross checking. It is important to emphasise that standard optical interfaces are intended to be used with IEC standards of various categories, which already include: interface standards; test and measu

23、rement methods; performance standards; reliability standards; quality assurance standards. Interface standards provide all the essential information about a given product type or family necessary to ensure that all products compliant with the interface standard will mate/de-mate. Test and measuremen

24、t methods give a prescribed approach to the way in which key parameters that need to be assessed are evaluated. Performance standards use these methods to define a set of conditions indicative to a known system location against which a product can be evaluated on a once off basis to prove that its d

25、esign and manufacture are capable of satisfying the necessary criteria. Reliability standards are intended to provide the user and manufacturer with a set of tools for assessing the ability of the product to continue to meet the required criteria over a given or known period of time. Alternatively t

26、hey may give a means by which the life expectancy of the product can be estimated. Quality assurance standards describe the mechanisms/methods which can be used to ensure that a product is manufactured to a consistent level of quality, i.e. they allow the manufacturer to demonstrate that a product w

27、hich has been shown to meet a prescribed performance standard can continue to be manufactured such that the 10th, 100th, 1 000th etc. product will be the same as the first. 5 EN 61755-1:2006 The two basic performance parameters that characterise the optical interface are attenuation and return loss.

28、 Each parameter places different physical constraints on the optical interface. Environmental conditions also affect the performance of the optical interface and it may require definition of physical and mechanical requirements to ensure that the performance specified is maintained over the environm

29、ental extremes defined in a particular performance standard. Manufacturing materials and processes also affect the optical interface and therefore the standard has been designed to allow manufacturers to demonstrate compliance with the standard while still permitting the maximum of manufacturing dif

30、ferentiation. The relationship between, and suitability of, materials specified in Part 3 documents for different performance categories as specified in IEC 61753-1 will be defined, e.g. zirconia ferrule material can be applied in all environmental categories, while the polymer material specified fo

31、r some rectangular ferrules may only be applicable for category C. Optical interface standards define sets of prescribed conditions, which must be maintained in order to satisfy the requirements for the attenuation and return loss performance in a randomly mated pair of fibres of the same type. 0.2

32、Hierarchical relationship The hierarchical relationship between optical interface standards and interface standards is shown in Figure 1. Optical interface: Part 1 General and guidance Optical interface: Part 2 Fibre to fibre, e.g. lateral and angular offset excluding fibre support mechanisms Optica

33、l interface: Part 3 Fibre support mechanisms and material properties, e.g. in the case of ferrules, effects of dome offset, fibre undercut and fibre position necessary to meet the performance requirements of Part 2 Connector interface Connector mating dimensions, e.g. effects of spring force, etc. I

34、EC 2531/05Figure 1 Relationship between optical interface standards and interface standards EN 61755-1:2006 6 FIBRE OPTIC CONNECTOR OPTICAL INTERFACES Part 1: Optical interfaces for single mode non-dispersion shifted fibres General and guidance 1 Scope This part of IEC 61755 covers singlemode optica

35、l interfaces. It includes references, document structure details, definitions, preferred grades and the rules under which an optical interface is created. This standard defines the location of the fibre core in relation to the datum target and the following key parameters: lateral offset, end face s

36、eparation, end face angle, end face high index layer condition. It also defines standardised test methods where appropriate. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For und

37、ated references, the latest edition of the referenced document (including any amendments) applies. IEC 61300 (all parts), Fibre optic interconnecting devices and passive components Basic test and measurement procedures IEC 61753-1, Fibre optic interconnecting devices and passive components - Part 1:

38、 General and guidance for performance standard 1IEC 61754 (all parts), Fibre optic connector interfaces 3 Terms and definitions For the purposes of this document the following terms and definitions apply: 3.1 angular misalignment losses attenuation losses associated with each of the two fibres being

39、 angularly displaced from the point of alignment where lowest attenuation occurs 3.2 angularly orientable connector keyed connector the construction of which is such that once the fibre has been permanently fixed in the connector, the fibre core may be rotated with respect to the key. The rotation s

40、hould cause the fibre core to move to a predetermined angular position with respect to a line, which begins at the optical datum target and passes through the keying feature _ 1To be published. 7 EN 61755-1:2006 3.3 contact area total surface area of the optical interface which is intended to be in

41、contact when two identical optical interfaces are brought together under a set of prescribed conditions 3.4 end face boundary conditions surface conditions that exist at the optical interface after all termination processes have been completed 3.5 end face separation losses attenuation losses associ

42、ated with an axial separation of the two fibres from the point of alignment where lowest attenuation occurs 3.6 fibre axis eccentricity radial and angular polar position of the fibre axis in cylindrical co-ordinate system of the connector relative to the assumed datum target 3.7 fibre axis tilt angl

43、e position tilt angle position of the fibre axis in the cylindrical co-ordinate system of the connector relative to the assumed horizontal fibre axis in the z direction 3.8 fixed connector keyed connector the construction of which is such that the position of the fibre core may not be translated or

44、rotated with respect to the key or the optical datum target once the fibre has been permanently fixed in the connector 3.9 high index layer compacted region at the fibre end face where the refractive index is often higher than that of an unpolished cleaved fibre 3.10 lateral offset losses attenuatio

45、n losses associated with a lateral displacement of the two fibres from the point of alignment where lowest attenuation occurs 3.11 mode field diameter Gaussian model beam waist diameter, also sometimes referred to as the mode field spot diameter (the diameter where the radial field amplitude of the

46、fundamental mode decreases to 1/e of its maximum at the optical fibre axis) 3.12 mode field ratio losses attenuation losses associated with the interaction of different mode field diameters for the “transmit” and “receive” fibres 3.13 multiple path interference interference caused when light of the

47、same wavelength constructively or destructively interferes with itself through a series of paths at the optical interface EN 61755-1:2006 8 3.14 optical interface standard set of prescribed, measurable conditions which must be met in order to satisfy the require-ments for attenuation and return loss

48、 performance and environmental stability in a mated pair of fibres 3.15 optical port window in an optical component through which optical energy enters and/or exits 3.16 optical datum target theoretical datum point on a connector interface where the optical fibre core centre or centre of the optical

49、 waveguide should be positioned 3.17 pit permanent non-linear feature caused by surface damage during polishing or handling 3.18 scratch permanent linear surface feature derived from polishing or handling 3.19 translationally orientable connector keyed or unkeyed connector the construction of which is such that the fibre core may be caused to move translationally to within a prescribed distance from the optical datum target and then permanently fixed 4 Document structure Thi