1、BRITISH STANDARD BS EN 61300-3-13: 1997 IEC 61300-3-13: 1995 Fibre optic interconnecting devices and passive components Basictest and measurement procedures Part 3.13: Examinations and measurements Control stability of a fibre optic switch The European Standard EN61300-3-13:1997 has the status of a
2、British Standard ICS 33.180.20BSEN61300-3-13:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15November1997 BSI 04-2000 ISBN 0 580 28511 1 National foreword This
3、British Standard is the English language version of EN61300-3-13:1997. It is identical with IEC61300-3-13:1995. The UK participation in its preparation was entrusted by Technical Committee EPL/86, Fibre optics, to Subcommittee EPL/86/2, Interconnecting devices and passive components, which has the r
4、esponsibility 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 and promulgate them in the UK.
5、 A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January1997, 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 during the change over from one
6、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 corresponding European publication
7、s. The British Standards which implement these international or European publications 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 d
8、oes 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 of pages This document comprises a front cover, an in
9、side front cover, pages i and ii, theEN title page, pages 2 to 6 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 cover. Amendments issued since publication Amd. No. Date
10、CommentsBSEN61300-3-13:1997 BSI 02-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 61300-3-13 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61300-3-13 August 1997 ICS 33.180.20 English version Fibre optic interconnecting devices and passive components
11、Basic test and measurement procedures Part 3-13: Examinations and measurements Controlstability of a fibre optic switch (IEC 61300-3-13:1995) Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie3-13: Examens et mesures Stabilit de contr
12、le dun interrupteur pour fibres optiques (CEI61300-3-13:1995) Lichtwellenleiter Verbindungselemente undpassive Bauteile Grundlegende Prf- und Meverfahren Teil3-13: Untersuchungen und Messungen Schaltstabilitt eines faseroptischen Schalters (IEC61300-3-13:1995) This European Standard was approved by
13、CENELEC on1997-07-01. 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 national stan
14、dards 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 language and not
15、ified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland a
16、nd 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-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any
17、means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-13:1997 EEN61300-3-13:1997 BSI 02-2000 2 Foreword The text of the International Standard IEC61300-3-13:1995, prepared by SC86B, Fibre optic interconnecting devices and passive components, of IECTC86, Fibre optics, was submitted to the
18、 formal vote and was approved by CENELEC as EN61300-3-13 on1997-07-01 without any modification. 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 tex
19、t of the International Standard IEC61300-3-13:1995 was approved by CENELEC as a European Standard 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 3 2 Apparatus 3 3 Procedure 4 4 Details to be specified 5 Annex ZA
20、 (normative) Normative references to international publications with their corresponding European publications 6 Figure 1 Test set-up 4 Figure 2 4 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-06-01 l
21、atest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-06-01EN61300-3-13:1997 BSI 02-2000 3 1 General 1.1 Scope and object The purpose of this part of IEC1300 is to measure the change in the optical characteristics of a switch in a given state as the activ
22、ation energy is varied. The measurement is conducted to ensure that the switch states are stable and insensitive to variations in the applied activation energy. 1.2 General description The activation energy is varied about its nominal value while the optical characteristics (attenuation and return l
23、oss) are measured. The activation energy is continuously varied between a minimum and maximum level described in the detail specification. The control stability is determined by measuring the optical characteristics of the switch and expressed as a range between the maximum and minimum values for a
24、number of cycles defined in the detail specification. The control stability will, in general, be different for each different switch state. 1.3 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this section of IEC
25、1300-3. At the time of publication, the edition indicated was valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC1300-3 are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated bel
26、ow. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 875-1:1992, Fibre optic branching devices Part1: Generic specification. 2 Apparatus The following apparatus and equipment are required to perform this measurement. 2.1 Optical source (S) The source shall be
27、 sufficiently stable over the time required to perform the measurements. The source shall be capable of producing the spectral characteristics defined in the detail specification (both wavelength and spectral width). 2.2 Excitation unit (E) This is a special launch fibre or imaging system designed t
28、o achieve the required launch conditions. 2.3 Branching device (BD) This is a four-port branching device capable of being used at the wavelength of the optical source and has known transfer coefficients at that wavelength. 2.4 Temporary Joint (TJ) This is a method, device or mechanical fixture for t
29、emporarily aligning two fibre ends into a reproducible, low-loss joint. It may, for example, be a precision V-groove vacuum chuck, micro manipulator, or a fusion or mechanical splice. The stability of the temporary joint shall be compatible with the measurement precision required. 2.5 Detector A det
30、ector shall be used which has sufficient dynamic range to make the measurement. The detector shall be linear over the optical power levels expected to be encountered. Any detector non-linearity contributes directly to measurement error. The detector shall have a sufficient active area and be placed
31、sufficiently close to the output to capture all of the light emitting from the output fibre of the switch to be measured. 2.6 Reference fibre (RF) A fibre of the same type as the pigtail fibre of the specimen. When required, its length, dimensional and optical parameters shall be specified in the de
32、tail specification.EN61300-3-13:1997 4 BSI 02-2000 3 Procedure The measurement is made by comparing the light transmitted through the component and that reflected from the component along the incident path with the optical power incident on the component and along the fibre. This is accomplished thr
33、ough repeated measurements which may be facilitated by the use of automated data acquisition. 3.1 Pre-condition the specimen as specified. 3.2 Configure the measurement as shown inFigure 1. When setting up this measuring arrangement, care should be taken to interconnect all fibre components and inte
34、rfaces so that the return loss from these interfaces is high and stable. Procedures to reduce the reflected power from the detectors (D 1 ) and (D 3 ) and the temporary joints (TJ) to an acceptable level shall be used and specified in the detail specification. 3.3 Measure the transfer coefficients o
35、f the branching device BD in accordance with IEC875-1. The source(S) for these measurements shall be the same as that used in the measurement set-up ofFigure 1. 3.4 After ensuring the stability and repeatibility of the measurement set-up, record power levels P 1 , P 2 , andP 3 . 3.5 Remove the fibre
36、 length L 1from the set-up and replace it with the pigtailed component assembly as shown inFigure 2. The device under measurement (DUT) shall be assembled in accordance with the manufacturers instructions. Particular attention should be given to the cleaning instructions and to the use of any requir
37、ed index matching materials. 3.6 After ensuring the stability of the temporary joints, record, and( is ideally unchanged fromP 3 ). 3.7 Calculate the return loss using the following formula: Figure 1 Test set-up Figure 2 (1) P 1 P 2 P 3 P 3EN61300-3-13:1997 BSI 02-2000 5 3.8 Calculate the attenuatio
38、n using the following formula: 3.9 The activation energy is continuously varied between a minimum and maximum value as defined in the detail specification. While the activation energy is varied, record the maximum and minimum values of a and a r . 3.10 The control stability for a particular switch s
39、etting is given by: where the maximum and minimum values of a and a rare over all N cycles. 4 Details to be specified The following details, as applicable, shall be specified in the detail specification: Source (S) characteristics Excitation unit (E) Launch conditions Detector (D) characteristics Br
40、anching device requirements Fibre lengths (L 1 , L 2 ) Temporary joint (TJ) Preconditioning procedure Allowable added loss due to temporary joints Performance requirements (control stability of return loss, attenuation) Number of cycles Switch state measured Deviations from this measuring procedure.
41、 (2) %a =| a (max) a (min) | (3) %a r=| a r(max) a r(min) | (4)EN61300-3-13:1997 6 BSI 02-2000 Annex ZA (normative) Normative references to international publications with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from oth
42、er publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or
43、 revision. For undated references the latest edition of the publication referred to applies (including amendments). NOTEWhen an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60875-1 1992 Fibr
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