1、BRITISH STANDARD BS EN 61300-2-41: 1998 IEC 61300-2-41: 1998 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-41: Tests Screen testing of attenuation of single-mode tuned non-angled optical fibre connectors The European Standard EN 61300-2-41:19
2、98 has the status of a British Standard ICS 33.180.20BSEN61300-2-41:1998 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1998 BSI 06-1999 ISBN 0 580 30
3、142 7 National foreword This British Standard is the English language version of EN61300-2-41:1998. It is identical with IEC61300-2-41:1998. The UK participation in its preparation was entrusted by Technical Committee EPL/86, Fibre optics, to Subcommittee EPL/86/2, Interconnecting devices and passiv
4、e components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments a
5、nd promulgate them in the UK. 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 number60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time du
6、ring the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corr
7、esponding European publications. The British Standards which implement international or European publications referred to in this document 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
8、 Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary
9、of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 10 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cov
10、er. Amendments issued since publication Amd. No. Date CommentsBSEN61300-2-41:1998 BSI 06-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61300-2-41 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61300-2-41 April 1998 ICS 33.180.20 English version Fibre
11、optic interconnecting devices and passive components Basic test and measurement procedures Part 2-41: Tests Screen testing of attenuation of single-mode tuned non-angled optical fibre connectors (IEC 61300-2-41:1998) Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondament
12、ales dessais et de mesures Partie 2-41: Essais Essais de slection concernant laffaiblissement des connecteurs fibres optiques unimodales non angulaires accordes (CEI 61300-2-41:1998) Lichtwellenleiter-Verbindungselemente und passive Bauteile Grundlegende Prf- und Meverfahren Teil 2-41: Prfungen Verf
13、ahren zur Sortierprfung von justierbaren nicht schrg angeschliffenen Einmoden-LWL- Steckverbindern in Abhngigkeit von der Dmpfung (IEC 61300-2-41:1998) This European Standard was approved by CENELEC on1998-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which sti
14、pulate 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 national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Stand
15、ard 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 language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the nation
16、al electrotechnical committees of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europe
17、n de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-2-41:1998 EEN61300-2-41:1998 BS
18、I 06-1999 2 Foreword The text of document86B/1041/FDIS, future edition1 of IEC61300-2-41, prepared by SC86B, Fibre optic interconnecting devices and passive components, of IECTC86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN61300-2-41 on1998-04-01.
19、The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61300-2-41:1998 was approved by CENELEC as a European Standar
20、d without any modification. Contents Page Foreword 2 1 General 3 1.1 Scope and object 3 1.2 General description 3 1.3 Normative reference 2 2 Apparatus 3 2.1 Method 1 3 2.2 Method 2 4 3 Procedure 4 3.1 Method 1 4 3.2 Method 2 6 4 Details to be specified 9 4.1 Method 1 9 4.2 Method 2 9 Annex ZA (norm
21、ative) Normative references to international publications with their corresponding European publications 10 Figure 1 Method 1: Measurement procedure 5 Figure 2 Method 1: Key direction and measurement procedure 6 Figure 3 Method 2: Measurement set-up 7 Figure 4 Method 2: Key direction 7 Figure 5 Meth
22、od 2: Measurement procedure 8 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1999-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2001-01-01EN61300-2-41:
23、1998 BSI 06-1999 3 1 General 1.1 Scope and object This screen test is prepared for single-mode non-angled optical fibre connectors which are tunable. The purpose of this part of IEC61300 is to ensure that tuned plugs have been optimally adjusted. The procedures described in this test are applicable
24、for both optical patch cords and pigtail cords. 1.2 General description Attenuation in single mode connectors is mainly caused by lateral misalignment of the respective fibre cores. The misalignment is related to lateral offsets of the fibre core centre to the ferrule centre of each connector plug.
25、Tuned connectors are used for the realization of attenuations lower than a certain specified value of L maxin random concatenation in the field. In order to realize this, the plug shall have a lateral offset of fibre core centre to the ferrule centre smaller than a certain specified value of R max .
26、 In addition, the tuned plug has a key for orienting the plug. The plug shall be assembled so that the direction of its fibre core centre to its ferrule centre coincides with its keying direction with an adjusting error less than a specified value adj (=2;/N adj , where N adjis the adjusting number)
27、, where a recommended adjusting number N adjis4,6 or8. The screen test methods described in the subsequent procedure are able to identify plugs having the desired tuning performance. The tests ensure that the plugs passing this test have attenuations lower than L maxwhen they are randomly concatenat
28、ed to each other. Two methods are described for screen testing the assembled tuned connectors: method 1: attenuation measurement method with a reference plug and a standard adjustment plug; method 2: fibre core position measurement method with optical instruments. 1.3 Normative reference The followi
29、ng normative document contains provisions which, through reference in this text, constitute provisions of this part of IEC61300. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC61300 are
30、encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and meas
31、urement procedures Part3-4: Examinations and measurements Attenuation 1) . 2 Apparatus 2.1 Method 1 2.1.1 Optical source S 2.1.2 Excitation unit E 2.1.3 Detector D 2.1.4 Temporary joints TJ 2.1.5 Reference plug PR: the reference plug has a lateral offset less than a certain value of R r .0,34m is re
32、commended for the value of R rfor single-mode fibre. 2.1.6 Standard adjustment plug PA: the standard adjustment plug has a relatively large lateral offset R adj .14m to24m is suggested for single-mode fibre. The direction of the fibre core to the ferrule centre shall coincide with the keying directi
33、on with a small error of less than5. 2.1.7 Standard adjustment adaptor AA: the standard adjustment adaptor has a keying mechanism which enables the adaptor to couple to the objective plug in N adjorientation each separated by adj.One of the N adjorientation shall be equal to the key direction of the
34、 connector. A low attenuation less than0,1dB shall be obtained when the two reference plugs are connected with the adjustment adaptor in every N adjorientation. 2.1.8 Reference adaptor AR: a low attenuation less than0,1dB shall be obtained when the two reference plugs are connected with the referenc
35、e adaptor. 1) To be published.EN61300-2-41:1998 4 BSI 06-1999 2.2 Method 2 2.2.1 Visible light source VS 2.2.2 Precise alignment feature AF or V-groove: the precise alignment feature or V-groove shall have enough rigidity and precision so as to measure the fibre core centre of an objective plug ferr
36、ule with sub-micrometer order. The axis of the alignment feature or the V-groove shall coincide with that of a microscope. 2.2.3 Microscope unit MS: the microscope unit shall consist of a microscope and a processing unit. The microscope shall have enough magnification to observe the fibre core centr
37、e of the objective plug ferrule. The processing unit shall have the ability to magnify the feature of the ferrule end face obtained with the microscope so that the fibre core can be observed on a video monitor. A total magnification greater than400 is recommended for the measurement of the fibre cor
38、e centre. In addition, the processing unit shall be equipped with a measurement function which measures the position of the fibre core centre on the video monitor. 2.2.4 Video monitor M 2.2.5 Temporary joints TJ 3 Procedure 3.1 Method 1 The surface of plug ferrules and alignment sleeves shall be cle
39、aned before test using a dust free cleaner. The clean condition shall be maintained during the test. Even microscopic dust affects the accuracy of the test. The measurement method of attenuation shall comply with the insertion method (B) of IEC61300-3-4. Unless otherwise stated in the detail specifi
40、cation, the conditions of the attenuation measurement are as follows: measurement condition: at ambient condition; optical source: laser diode. 3.1.1 Measure attenuation L 0of an objective plug using the reference plug and the reference adaptor, and confirm the measured value L 0(seeFigure 1). This
41、value should be less than a specified value of L max.If L 0is greater than L max , then the objective plug does not pass the test. 3.1.2 Connect the objective plug to the standard adjustment plug using the standard adjustment adaptor so that the key direction of the objective plug coincides with the
42、 keying direction which is the key direction of the standard adjustment plug (seeFigure 2a). Measure the power P 0(seeFigure 2c). 3.1.3 Repeat the following procedure N adj 1 times: disconnect the objective plug from the standard adjustment plug and rotate it by adj.Connect the objective plug to the
43、 standard adjustment plug so that the key direction of the objective plug becomes N(=N adj ) from the keying direction (seeFigure 2b). Measure the power P N(seeFigure 2c). 3.1.4 Confirm P 0is the largest compared to P 1 ,., P N , ., and P Nadj1 , and the objective plug passes the test. If P 0is not
44、the largest, then the objective plug does not pass the test.EN61300-2-41:1998 BSI 06-1999 5 Figure 1 Method 1: Measurement procedureEN61300-2-41:1998 6 BSI 06-1999 3.2 Method 2 The surface of plug ferrules and an alignment feature shall be cleaned before the test using a dust free cleaner. The clean
45、 condition shall be maintained during the test. Even microscopic dust affects the accuracy of the test. When an objective plug ferrule is fixed in the alignment feature, the portion of the ferrule shall be precisely in contact with the surface of the alignment feature. The length of the ferrule cont
46、acting the alignment feature shall be twice larger than the diameter of the ferrule. 3.2.1 Affix the ferrule of the objective plug in the alignment feature (seeFigure 3). Connect the opposite end of the objective plug cord to the visible light source. Adjust light power so that the fibre core of the
47、 objective plug can be observed on the video monitor through the microscope. Rotate the plug so that its key direction coincides with some pre-defined direction (keying direction) of the alignment feature (seeFigure 4a). Measure the position Q 0of the fibre core centre using the processing unit and
48、video monitor (seeFigure 5a). 3.2.2 Repeat the following procedure N adj1 times: rotate the plug by adjso that its key direction becomes N(= N adj ) from the keying direction of the alignment feature (seeFigure 4b). Measure the position Q Nof the fibre core centre using the processing unit and video
49、 monitor (seeFigure 5b). 3.2.3 Calculate the ferrule centre position Q Fof the objective plug using the data of the positions Q 0 , Q 1 , ., Q N., and Q Nadj1of the rotated fibre core centre (seeFigure 5c). Figure 2 Method 1: Key direction and measurement procedureEN61300-2-41:1998 BSI 06-1999 7 3.2.4 Calculate the lateral offset R of the fibre core to the ferrule centre of the objective plug (seeFigure 5c). If the lateral offset of R is larger than the specified value of R m
