1、 STD-BSI BS EN b1300-2-iL-ENGL 1778 = LbZibb7 0731b78 Obb W BS EN 61300-2-41:1998 IEC 61300-2-41:1998 BRITISH STANDARD 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
2、 optical fibre connectors The European Standard EN 6130-241:1998 has the status of a British Standard ICs 33.180.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN bL300-2-41-ENGL 1998 = Lb24bbS 073Lb79 TTZ Amd. No. BS EN 61300-2-41:1998 Date Text affected This B
3、ritish Standard, having been prepared under the direction of the Electrotechnicai Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1998 National foreword This British Standard is the English language version of EN 61300-2-41:1998. It is ide
4、ntical with IEC 61300-241:1998. The UK participation in its preparation was entrusted by Technical Committee EPL/86, Fibre optics, to Subcommittee EPUW, interconnecting devices and passive components, which has the responsibility to: - aid enquirers to understand the tea, - present to the responsibl
5、e internationallEuropean committee any enquiries on the inteqmtation, or proposals for change, and keep the UK interests informed; - monitor related intemationai and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on reque
6、st to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, EC 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 s
7、ystems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards nody include an annex which lists normative references to intedonal publications with their corresponding European publications. The British Standards which implement international or European publications referre
8、d to in this document may be found in the BSI Standards Catalogue under the section entitled “Intemational Standards Conespondence 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 contr
9、act 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 of pages This document comprises a front cover, an inside hnt cover, the EN title page, pages 2 to 13 and a back cover.
10、0 BSI 1998 ISBN O 580 30142 7 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61 300-2-41 April 1998 ICs 33.180.20 English version Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-41 : Tests - Screen testing of attenuation of single-mode tu
11、ned non-angled optical fibre connectors (IEC 61 300-2-41 11 998) Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 2-41: Essais - Essais de slection concernant laffaiblissement des connecteurs fibres optiques unimodales non angulaire
12、s accordes (CE1 61 300-2-41 : 1998) Lichtw ellenleiter-Verbindungselemente und passive Bauteile Grundlegende Prf- und Meverfahren Teil 2-41 : Prfungen - Verfahren zur Sortierprfung von justierbaren nicht schrg angeschliffenen Einmoden-LWL- Steckverbindern in Abhngigkeit von der Dmpfung (IEC 61 300-2
13、-41 1998) * * m This European Standard was approved by CENELEC on 1998-04-01. CENELEC members are bound to comply with the CENICENELEC 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
14、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 translation under the responsi
15、bility 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
16、 Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 105
17、0 Brussels 1998 CENELEC - All rights of exploitation in any form and by any means reserved worldwlde for CENELEC members Ref. No. EN 61300-2-41:1998 E Page 2 EN 61300-2-41:1998 Foreword The text of document 86811 041 /Fills, future edition 1 of IEC 61 300-2-41, prepared by SC 868, Fibre optic interc
18、onnecting 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 6 1 300-2-41 on 1 998-04-01 . The following dates were fixed: - latest date by which the EN has to be implemented at national levei by publication of
19、 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) 200 1 -0 1 -0 1 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA
20、has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61 300-2-41 :1998 was approved by CENELEC as a European Standard without any modification. Page 3 EN 61300-2-41:1998 CONTENTS Clause General 1.1 Scope and object . 1.2 General description 1.3 Normative reference
21、 Apparatus . 2.1 Method 1 . 2.2 Method 2 . Procedure . 3.1 Method 1 . 3.2 Method 2 . Details to be specified . 4.1 Method 1 . 4.2 Method 2 . . Annex ZA Normative references to international publications with * * m their corresponding European publications . Page 4 4 4 4 5 5 5 6 6 9 12 12 12 13 O BSI
22、 1998 Page 4 EN 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 1 General 1.1 Scope and object This screen test is prepared
23、for single-mode non-angled optical fibre connectors which are tunable. The purpose of this part of IEC 61300 is to ensure that tuned plugs have been optimally adjusted. The procedures described in this test are applicable for both optical patch cords and pigtail cords. 1.2 General description Attenu
24、ation 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. Tuned connectors are used for the realization of attenuations lower than a cer
25、tain specified value of Lma, in 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 Rmax. in addition, the tuned plug has a key for orienting the plug. The plug shall be
26、 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 ea,-+(= 2XINadj, where Nadl is the adjusting number), where a recommended adjusting number Nadl IS 4, 6 or 8. The screen test method
27、s 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, when they are randomly concatenated to each other. Two methods are described for screen testing the assembled tu
28、ned connectors: - method 1: attenuation measurement method with a reference plug and a standard adjust- ment plug; method 2: fibre core position measurement method with optical instruments. - 1.3 Normative reference The following normative document contains provisions which, through reference in thi
29、s text, constitute provisions of this pari of IEC 61300. 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 IEC 61300 are encouraged to investigate the possibility of applying the most recent e
30、dition of the normative document indicated below. Members of iEC and IS0 maintain registers of currently valid international Standards. IEC 61 300-3-4,- Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-4: Examinations and measurements - Atte
31、nuation 1) To be published. *- * vi Page 5 EN 61300-2-41:1998 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,. 0,3 pm is recommended for
32、 the value of R, for single-mode fibre. 2.1.6 Standard adjustment plug PA: the standard adjustment plug has a relatively large lateral offset Rad,. 1 pm to 2 pm is suggested for single-mode fibre. The direction of the fibre core to the ferrule centre shall coincide with the keying direction with a s
33、mall error of less than 5“. 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 Nad, orientation each separated by Gad, One of the Nad, orientation shall be equal to the key direction of the connect
34、or. A low attenuation less than 0,l di3 shall be obtained when the two reference plugs are connected with the adjustment adaptor in every Nad, orientation. 2.1.8 Reference adaptor AR: a low attenuation less than 0,l dB shall be obtained when the two reference plugs are connected with the reference a
35、daptor. 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 ferrule with sub-micrometer order. The axis of the alignme
36、nt 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 centre of the objective plug ferrule. The processing unit s
37、hall 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 than 400 is recommended for the measurement of the fibre core centre. In addition, the processing unit shall be e
38、quipped 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 Page 6 EN 61300-2-41:1998 3 Procedure 3.1 Method 1 The surface of plug ferrules and alignment sleeves shall be cleaned before test using a du
39、st 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 IEC 61300-3-4. Unless otherwise stated in the detail specification, the conditions of
40、the attenuation measurement are as follows: - - optical source: laser diode. measurement condition: at ambient condition; 3.1.1 Measure attenuation Lo of an objective plug using the reference plug and the reference adaptor, and confirm the measured value Lo (see figure 1). This value should be less
41、than a specified value of L, If Lo is greater than L, 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 keying direction which is th
42、e key direction of the standard adjustment plug (see figure 2a). Measure the power Po (see figure 2c). 3.1.3 Repeat the following procedure Nadj - 1 times: disconnect the objective plug from the standard adjustment plug and rotate it by Oadj, Connect the objective plug to the standard adjustment plu
43、g so that the key direction of the objective plug becomes 0, (= N x Oadj) from the keying direction (see figure 2b). Measure the power P, (see figure 2c). 3.1.4 Confirm Po is the largest compared to P, ., PN, ., and PNadj-, and the objective plug passes the test. If Po is not the largest, then the o
44、bjective plug does not pass the test. SIE IEC Figure la Page 7 EN 61300-2-41:1998 pi n 063/98 Patch cord DUT D pout SIE Pigtail cord DUT (pigtail cord) D pout Objective plug IEC 064/98 Lo = -10 log (POutlPln) Figure 1 b Figure 1 - Method 1 : Measurement procedure STD-BSI BS EN bL300-2-4L-ENGL 1998 L
45、bZibb7 0731b87 O79 Page 8 EN 61300-2-411998 Keying direction Keying direction of objective plug Objective plug IEC 065/98 A WON . beNadj-i IEC 066198 Figure 2a Figure 2b DUT Pigtail cord PO, pl, . PN, . , PNadj-1 SIE IEC 067198 Figure 2c Figure 2 - Method 1 : Key direction and measurement procedure
46、* * v) STD-BSI BS EN bL300-2-4L-ENL L998 II Lb24bb9 73Lb TU5 m Page 9 EN 61300-2-41:1998 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 condition shall be maintained during the test. Even microscopic dust affec
47、ts 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 contacting the alignment feature shall be twice larger than the diameter of the
48、 ferrule. 3.2.1 Affix the ferrule of the objective plug in the alignment feature (see figure 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 objective plug can be observed on the video monitor through the microscop
49、e. Rotate the plug so that its key direction coincides with some pre-defined direction (keying direction) of the alignment feature (see figure 4a). Measure the position Q, of the fibre core centre using the processing unit and video monitor (see figure 5a). 3.2.2 Repeat the following procedure Nadj - 1 times: rotate the plug by dad, so that its key direction becomes 8, (= N x from the keying direction of the alignment feature (see figure 4b). Measure the position QN of the fibre core centre using the processing unit and video monitor (see figure 5
