BS EN 61300-3-30-2003 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Examinations and measurements - Polish angle and fibre po.pdf

1、BRITISH STANDARD BS EN 61300-3-30: 2003 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-30: Examinations and measurements Polish angle and fibre position on single ferrule multifibre connectors The European Standard EN 61300-3-30:2003 has the s

2、tatus of a British Standard ICS 33.180.20 BS EN 61300-3-30:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 February 2003 BSI 20 February 2003 ISBN 0 580 41257 1 National foreword This British Standard is the official English language

3、version of EN 61300-3-30:2003. It is identical with IEC 61300-3-30:2003. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting devices and passive components, which has the responsibility to: A list of

4、 organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standard

5、s Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard do

6、es not of itself confer immunity from legal obligations. 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 deve

7、lopments 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 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication

8、 Amd. No. Date CommentsEUROPEAN STANDARD EN 61300-3-30 NORME EUROPENNE EUROPISCHE NORM January 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35

9、, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-30:2003 E ICS 33.180.20 English version Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 3-30:

10、 Examinations and measurements - Polish angle and fibre position on single ferrule multifibre connectors (IEC 61300-3-30:2003) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures Partie 3-30: Examens et mesures - Angle de la face polie et p

11、osition de la fibre sur lembout des connecteurs multifibres (CEI 61300-3-30:2003) Lichtwellenleiter-Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren Teil 3-30: Untersuchungen und Messungen - Polierwinkel und Faserposition von Mehrfaser-Steckverbindern mit einer Ferrule

12、(IEC 61300-3-30:2003) This European Standard was approved by CENELEC on 2002-12-01. 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 list

13、s 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 translation under the re

14、sponsibility 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, Hungary, Iceland,

15、Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 86B/1747/FDIS, future edition 1 of IEC 61300-3-30, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fi

16、bre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-3-30 on 2002-12-01. 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) 2003-10-

17、01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-12-01 _ Endorsement notice The text of the International Standard IEC 61300-3-30:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN61300330:2003 2 -00316-303 (

18、 3002:IECE) CONTENTS 1 Scope 4 2 Normative references. 4 3 General description 4 4 Apparatus 5 4.1 Ferrule holder . 5 4.2 Positioning stage. 5 4.3 Three-dimensional interferometry 5 5 Procedure 6 5.1 Measurement regions 6 5.2 Method for analysis. 8 6 Details to be specified 10 Annex A (informative)

19、Formula for calculating end face geometry. 12 Annex B (normative) Surface angle sign convention (shown graphically) 13 Annex C (normative) Fibre counting convention (shown graphically). 14 Bibliography . 15 Figure 1 Three-dimensional interferometry analyser . 6 Figure 2 Measurement regions on ferrul

20、e. 7 Figure 3 Multimode fibre core dip regions. 7 Table 1 Ferrule measurement areas 11 Table 2 Multimode core dip areas 11 Page3 EN61300330:2003-00316-3(3002:CEI 03)E 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-30: Examinations and measur

21、ements Polish angle and fibre position on single ferrule multifibre connectors 1 Scope This part of IEC 61300 describes a procedure to assess end face geometry in guide pin based multifibre ferrules and connectors. The primary attributes are fibre position relative to the end face, either undercut o

22、r protrusion, end face angle relative to the guide pin bores, and core dip for multimode fibres. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest

23、edition of the referenced document (including any amendments) applies. None. 3 General description Guide pin based multifibre connectors typically have a rectangular end face with a long axis and a short axis. Ideally a flat polish is desired on the end face with the fibres protruding slightly and a

24、ll in the same plane to assure physical contact of the fibre cores when two connectors are intermated. In practice, the end face typically has two different curvatures across the surface along the long and short axis. Since mated ferrules are aligned by pins in the guide holes, the end face of the f

25、errule must be properly oriented (X and Y angle) with respect to the guide holes to achieve positive contact. The end face angle in the X-axis and the end face angle in the Y-axis are measured by finding the best fit plane based on a percentage of the highest points in a specified region of interest

26、. The highest points typically show the greatest modulation from an interferometric standpoint. This allows for more robust measurements and greater repeatability between different interferometers. The angle of the best fit plane is calculated by comparing it to the reference plane which is perpendi

27、cular to the axis of each guide hole. The fibre protrusion, (+p), or undercut, (p), of the fibres is a planar height defined as the distance between the fibre end face and the best fit planar surface previously described. Core dip is specific to multimode fibres because the large core is softer than

28、 the edge of the fibre and tends to polish away faster. Core dip is calculated by subtracting the average height of the core area from the average height of an annular area near the edge of the fibre. One method is described for this procedure. Analysing the endface with a three-dimensional interfer

29、ometry type surface analyser. Page4 EN61300330:2003 6 -00316-303 ( 3002:IECE) 4 Apparatus Three-dimensional surface analysis by an interferometer system. The apparatus shown in figure 1 consists of a suitable ferrule holder, a positioning stage and a three-dimensional interferometry analyser capable

30、 of analyzing rough surfaces and step heights. 4.1 Ferrule holder The ferrule holder is a suitable device to hold the ferrule in a fixed position, either vertical or horizontal, or in a tilted position in the case of an angled ferrule type. Some method must be used to reference the axis of each guid

31、e hole and the average perpendicular angle to them, which shall be considered the ideal end face angle. This will typically entail the use of guide pins inserted into the guide holes or similar devices to transfer the axis of each guide hole to a measurable surface angle. 4.2 Positioning stage The f

32、errule holder is fixed to the positioning stage, which shall enable the ferrule holder to be moved to the appropriate position. The stage shall have enough rigidity so as to allow measurement of the ferrule end face with the required accuracy. 4.3 Three-dimensional interferometry The three-dimension

33、al interferometry analyser shall have the ability to measure the fibre heights on the ferrule end face with an accuracy of better than 50 nm. The analyser shall consist of a microscope unit, a surface data processing unit and a monitor. The microscope unit shall consist of an interference microscope

34、, a phase shift actuator, an image detector and a frame grabber. The interference microscope equipped with an objective is arranged so as to view the end face of the ferrule. The surface data processing unit shall be able to process the surface height information so as to measure the radius of curva

35、ture in the X and Y axis, the angle of the end face in the X and Y axis and the protrusion or undercut of the fibres from the best fit planar surface. A flatness deviation shall be calculated to determine if the connector has too great a curvature to consider the surface a plane. The monitor shall d

36、isplay the measured and calculated surface profiles along each axis. Page5 EN61300330:2003-00316-3(3002:CEI 03)E 7 IEC 2664/02 Figure 1 Three-dimensional interferometry analyser 5 Procedure 5.1 Measurement regions The following regions shall be defined on the ferrule end face for the measurement. a)

37、 Region of interest (ROI): the ROI is set on the ferrule surface and defined by a rectangular region having a long axis (X axis) of length, L, and a short axis (Y axis) of height, H; The region of interest is chosen to cover the intended contact zone of the ferrule end face when the ferrules are mat

38、ed. The region of interest shall be centred on the fibre array. See figure 2. Refer to table 1 for measurement areas to be used for different connectors. b) Extracting region: the extracting region, which includes the fibre end face regions and the associated adhesive regions, are defined by circles

39、 having a diameter E, centred on each fibre; c) Fitting region: the fitting region is the region of interest excluding the extracting regions and is the data set used in making calculations for the ferrule surface. It is assumed that the surface points on the ferrule outside the fitting region will

40、be lower than the surface points in the fitting region. d) Averaging region: the averaging region is set on the fibre surfaces to be used to calculate the fibre height, and is defined by a circle having a diameter F. The averaging region is different for singlemode (SM) fibres and multimode (MM) fib

41、res. e) To assess core dip in MM fibres, two averaging regions are used. The first is the core fitting region with a diameter D core . The second region is an annular area bound by a maximum annular ring of diameter D maxand a minimum annular ring of D min . See figure 3. Refer to table 2 for measur

42、ement areas. Page6 EN61300330:2003 8 -00316-303 ( 3002:IECE) Guide holes Averaging region Extracting region ROI region of interest Y-axis X-axis L H F E IEC 2665/02 Figure 2 Measurement regions on ferrule D max.Maximum annular region D min.Minimum annular regionD coreCore fitting region Multimode fi

43、ber IEC 2666/02 Figure 3 Multimode fibre core dip regions Page7 EN61300330:2003-00316-3(3002:CEI 03)E 9 5.2 Method for analysis 5.2.1 Affix the ferrule in the ferrule holder so that the end face is held sufficiently steady with respect to the interferometer. 5.2.2 Focus the microscope and/or the sam

44、ple until the fringes are in position to scan the surface. 5.2.3 Map the surface of the ferrule. To create data set “A”, use only the pixels contained within the ROI. ROI “A“ 5.2.4 Create data set “B” by removing the extraction regions around the fibres. “B“ 5.2.5 Create surface “C” by fitting a bip

45、ara- bolic curve to data set “B”. (See Annex A for a suggested curve fitting routine.) “C“ 5.2.6 Create data set “D” by subtracting surface “C” from data set “B”. “D“ 5.2.7 Create data set “E” by removing the highest 3 % of all pixels in data set “D”. This removes any small points that are extremely

46、 high compared to the others. It is assumed these will break off when the connectors contact. NOTE Points are selected as a percentage of the total area which includes pixels for which heights could not be determined. “E“ Page8 EN61300330:2003 01 -00316-303 ( 3002:IECE) 5.2.8 Create data set “F” by

47、identifying the highest 20 % of all pixels in data set “E”. NOTE Points are selected as a percentage of the total area which includes pixels for which heights could not be determined. “F“ 5.2.9 Create data set “G” by eliminating all pixels from data set “A” except for those identified in data set “F

48、”. “G“ 5.2.10 Fit a plane to data set “G” and use the plane to calculate X and Y angles using the average of the guide pin bore axis as a reference. (See Annex B for end face angle sign conventions.) “Add” the extraction regions back in. Calculate the fibre heights as the distance normal to the plan

49、e at the corresponding fibre centre locations. (See Annex C for fibre counting conventions.) “E + Plane“ 5.2.11 Create surface “H” by fitting a biparabolic curve to data set “G”. Calculate the flatness deviation. To find the flatness deviation, first draw a plane through the points where the biparabolic curve intersects a projection of the region of interest. Flatness deviatio