BS EN 61300-3-34-2009 Fibre optic interconnecting ndevices and passive components n— Basic test and measurement nprocedures — nPart 3-34 Examinations and measurements — nAttenuatio.pdf

1、Fibre optic interconnectingdevices and passive components Basic test and measurementprocedures Part 3-34: Examinations and measurements Attenuation of random mated connectorsBS EN 61300-3-34:2009raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Brit

2、ish StandardsNational forewordThis British Standard is the UK implementation of EN 61300-3-34:2009. It isidentical to IEC 61300-3-34:2009. It supersedes BS EN 61300-3-34:2002which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/86, Fibre optics, to Subcom

3、mittee GEL/86/2, Fibre optic interconnectingdevices and passive components.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct ap

4、plication. BSI 2009ISBN 978 0 580 60774 5ICS 33.180.20BRITISH STANDARDBS EN 61300-3-34:2009Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 April 2009. Amendment

5、s issued since publicationAmd. No. Date Text affectedEUROPEAN STANDARD EN 61300-3-34 NORME EUROPENNE EUROPISCHE NORM March 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Sec

6、retariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-34:2009 E ICS 33.180.20 Supersedes EN 61300-3-34:2002English version Fibre optic interconnecting devices and passive compon

7、ents - Basic test and measurement procedures - Part 3-34: Examinations and measurements - Attenuation of random mated connectors (IEC 61300-3-34:2009) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures - Partie 3-34: Examens et mesures - A

8、ffaiblissement d laccouplement de connecteurs quelconques (CEI 61300-3-34:2009) Lichtwellenleiter -Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 3-34: Untersuchungen und Messungen - Dmpfung von wahlfrei zusammengefgten Steckverbindern (IEC 61300-3-34:2009) Thi

9、s European Standard was approved by CENELEC on 2009-02-01. 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. Up-to-date lists and bibliographical ref

10、erences 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 responsibility of a CENELEC

11、 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ice

12、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61300-3-34:2009EN 61300-3-34:2009 - 2 - Foreword The text of document 86B/2767/FDIS, future edition 3 of IEC 61

13、300-3-34, prepared 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 61300-2-34 on 2009-02-01. This European Standard supersedes EN 61300-3-34:2002. Changes from EN 61300

14、-3-34:2002 are to reconsider launch conditions for multimode fibres. 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) 2009-11-01 latest date by which the national standards con

15、flicting with the EN have to be withdrawn (dow) 2010-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-3-34:2009 was approved by CENELEC as a European Standard without any modification. _ BS EN 61300-3-34:2009- 3 - EN 61300-3-34:2009 Anne

16、x ZA (normative) Normative references to international publications with their corresponding European publications 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 editi

17、on of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 61300-1 -1)Fibre optic interconnecting devices and passive compone

18、nts - Basic test and measurement procedures - Part 1: General and guidance EN 61300-1 20032)IEC 61300-3-1 -1)Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-1: Examinations and measurements - Visual examination EN 61300-3-1 20052)1)Undated

19、reference. 2)Valid edition at date of issue. BS EN 61300-3-34:2009 2 61300-3-34 IEC:2009(E) CONTENTS 1 Scope.5 2 Normative references .5 3 General description 5 3.1 Test methods 5 3.2 Precautions .6 4 Apparatus.6 4.1 Source (S).6 4.2 Launch conditions (E)7 4.3 Detector (D) 7 5 Procedure 7 5.1 Method

20、 1 .7 5.2 Method 2 .10 5.3 Analysis of results .13 6 Details to be specified 13 Figure 1 “Reference” patchcord measurement Method 1 .8 Figure 2 Test patchcord measurement Method 1.8 Figure 3 Test matrix for measurement method 1 10 Figure 4 “Reference” patchcord measurement Method 2 .11 Figure 5 Test

21、 patchcord measurement Method 2.11 Figure 6 Test matrix for measurement method 2 12 BS EN 61300-3-34:200961300-3-34 IEC:2009(E) 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-34: Examinations and measurements Attenuation of random mated conn

22、ectors 1 Scope This part of IEC 61300 describes the procedure required to measure the statistical distribution and mean attenuation for random mated optical connectors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referen

23、ces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61300-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 1: General and guidance IEC 61300-3-1, Fib

24、re optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations and measurements Visual examination 3 General description 3.1 Test methods Two test methods are described for measuring the attenuation of random mated optical connectors. Both provid

25、e an estimate of the expected average performance that a group of patchcords (including adaptors, if applicable) selected from a batch will exhibit when utilised in an optical system. The patchcords, and any adaptors, must be chosen at random to ensure that the measurements provide a statistically u

26、nbiased estimate. Method 1 describes the procedure based on the use of 10 patchcords (20 optical connectors) and 10 adaptors. In this case all of the plugs are sequentially used as “reference” plugs and all of the remaining plugs are tested against them. The result is based on 360 measurements as in

27、dicated in the test matrix shown in Figure 3. Method 1 is intended to be part of a design approval exercise that may involve one or more suppliers. Once approval is achieved, Method 2 would be relied on to maintain process control. However, in the event of a dispute, Method 1 shall act as the refere

28、nce measurement method. Method 2 describes a procedure based on the measurement of 15 patchcords. Five patchcords are selected as “reference” patchcords, with one plug on each of the patchcords being nominated as a “reference” plug. All plugs of the remaining 10 patchcords are then tested against ea

29、ch of the five “reference” plugs. This produces 100 measurements as indicated in the test matrix shown in Figure 6. BS EN 61300-3-34:2009 6 61300-3-34 IEC:2009(E) It is recognised that the number of measurements required by Method 1 may be excessive for day-to-day routine checking of either in-house

30、 or supplier produced products. In this case, as indicated above, Method 2 may be used as an alternative option. NOTE In this measurement method, the terms “reference” plug or “reference” patchcord are used to define those components chosen at random from a batch, against which a number of comparati

31、ve measurements are made. It is not intended that the terms should imply specially chosen or manufactured components, such as those used, for example, in screen testing. 3.2 Precautions The following test requirements shall be met: 3.2.1 Precautions shall be taken to ensure that the cladding modes d

32、o not affect the measurement. Cladding modes shall be stripped as a function of the fibre coating. 3.2.2 Precautions shall be taken to ensure the position of the fibres in the test remains fixed between the measurement of P1and P2to avoid changes in attenuation due to bending losses. 3.2.3 The stabi

33、lity performance of the test equipment shall be 0,05 dB or 10 % of the attenuation to be measured, whichever is the lower value. The stability shall be maintained over the measurement time and operational temperature range. The required measurement resolution shall be 0,01 dB for both multimode and

34、singlemode. 3.2.4 To achieve consistent results, clean and inspect all connectors and adaptors prior to measurement. Visual examination shall be undertaken in accordance with IEC 61300-3-1. 3.2.5 The power in the fibre shall be at a level that does not generate non-linear scattering effects. 4 Appar

35、atus 4.1 Source (S) The source consists of an optical emitter, the means to connect to it and associated drive electronics. In addition to meeting the stability and power level requirements, the source shall have the following characteristics: Centre wavelength: as detailed in the performance and pr

36、oduct standard; Spectral width: filtered LED 150 nm FWHM; Spectral width: LD 10 nm FWHM. For multimode fibres, broadband sources such as an LED shall be used. BS EN 61300-3-34:200961300-3-34 IEC:2009(E) 7 For singlemode fibres either an LED or LD may be used. NOTE The interference of modes from a co

37、herent source will create speckle patterns in multimode fibres. These speckle patterns give rise to speckle or modal noise and are observed as power fluctuations, since their characteristic times are longer than the resolution time of the detector. As a result, it may be impossible to achieve stable

38、 launch conditions using coherent sources for multimode measurements. Consequently, lasers, including OTDR sources, should be avoided in favour of LEDs or other incoherent sources for measuring multimode components. 4.2 Launch conditions (E) The launch condition shall be specified in accordance with

39、 Annex B of IEC 61300-1. 4.3 Detector (D) The detector consists of an optical detector, the means to connect to it and associated electronics. The connection to the detector will be an adaptor that accepts a connector plug of the appropriate design. The detector shall capture all light emitted by th

40、e connector plug. In addition to meeting the stability and resolution requirements, the detector shall have the following characteristics: Linearity: multimode 0,25 dB (over 5 dBm to 60 dBm); singlemode 0,1 dB (over 5 dBm to 60 dBm). NOTE The power meter linearity shall be referenced to a power leve

41、l of 23 dBm at the operational wavelength. Where the connection to the detector is broken between the measurement of P1 and P2, the measurement repeatability shall be within 0,05 dB or 10 % of the attenuation to be measured, whichever is the lower value. A large sensitive area detector may be used t

42、o achieve this. The precise characteristics of the detector shall be compatible with the measurement requirements. The dynamic range of the power meter shall be capable of measuring the power level exiting from the DUT at the wavelength being measured. 5 Procedure 5.1 Method 1 5.1.1 Randomly choose

43、10 patchcords for testing. Label the plugs under test sequentially from 1a through to 10b (i.e. 1a 1b, 2a 2b, 3a 3b.10a 10b). 5.1.2 Randomly choose 10 adaptors. Label each adaptor sequentially 1 through 10. 5.1.3 Insert patchcord 1a 1b into the measurement system as shown in Figure 1. Using plug 1a

44、as the “reference” plug, measure the power P1. BS EN 61300-3-34:2009 8 61300-3-34 IEC:2009(E) SE D“Reference” patchcordPlug1bPlug1aP1IEC 2557/01Figure 1 “Reference” patchcord measurement Method 1 5.1.4 Insert test patchcord 2a 2b and adaptor 1 into the system as shown in Figure 2 and measure the tra

45、nsmitted power P2. Adaptor 1“Reference” patchcord Test patchcordSEPlug1aPlug2aDP2Plug2bPlug1bIEC 2558/01Figure 2 Test patchcord measurement Method 1 5.1.5 Calculate the loss of the mated connector pair 1a/2a and adaptor 1, using the following equation: Insertion loss = 10 log (P1/P2) (A L) (1) where

46、 A is fibre attenuation per kilometre; L is length of the test patchcord in km. NOTE The product A L may be ignored for both singlemode and multimode 50/125 m and 62,5/125 m where the patchcord length is small, i.e. 10 m. 5.1.6 Enter the insertion loss value into the test matrix shown in Figure 3. 5

47、.1.7 Reverse the test patchcord 2a 2b and measure the transmitted power P2to obtain the insertion loss of the mated connector pair 1a/2b, using adaptor 1. 5.1.8 Repeat step 5.1.6. BS EN 61300-3-34:200961300-3-34 IEC:2009(E) 9 5.1.9 Maintaining plug 1a and adaptor 1 as the “reference” configuration,

48、replace test patchcord 2a 2b by patchcord 3a 3b. 5.1.10 Measure the transmitted power P2. 5.1.11 Repeat steps 5.1.9 and 5.1.10 until all of the plugs of the remaining test patchcords have been tested against the “reference” plug 1a. 5.1.12 When step 5.1.11 has been completed, reverse the “reference”

49、 patchcord so that plug 1b becomes the “reference” plug. 5.1.13 Measure the insertion loss of all test plugs against the “reference” plug 1b and adaptor 1. 5.1.14 When step 5.1.13 has been completed, replace the “reference” plug and adaptor so that plug 2a and adaptor 2 becomes the “reference” configuration. 5.1.15 Measure the insertion loss of all test plugs against “reference” plug 2a and adaptor 2. 5.1.