BS EN 61300-3-42-2008 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-42 Examinations and nmeasurements — Attenuation of.pdf

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1、BRITISH STANDARDBS EN 61300-3-42:2008Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-42: Examinations and measurements Attenuation of single mode alignment sleeves and or adaptors with resilient alignment sleevesICS 33.180.20g49g50g3g38g50g51g6

2、0g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61300-3-42:2008This British Standard was published under the authority of the Standards Policy and Strategy Commi

3、ttee on 29 August 2008 BSI 2008ISBN 978 0 580 54578 8National forewordThis British Standard is the UK implementation of EN 61300-3-42:2008. It is identical to IEC 61300-3-42:2007.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86

4、/2, Fibre optic interconnecting devices and passive components.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

5、Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsEUROPEAN STANDARD EN 61300-3-42 NORME EUROPENNE EUROPISCHE NORM May 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normal

6、isation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-42:2008 E ICS 33.180.20 English vers

7、ion Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-42: Examinations and measurements - Attenuation of single mode alignment sleeves and or adaptors with resilient alignment sleeves (IEC 61300-3-42:2007) Dispositifs dinterconnexion et compo

8、sants passifs fibres optiques - Procdures fondamentales dessais et de mesures - Partie 3-42: Examens et mesures - Affaiblissement apport par les manchons dalignement et/ou les raccords quips de manchons dalignement lastiques unimodaux (CEI 61300-3-42:2007) Lichtwellenleiter -Verbindungselemente und

9、passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 3-42: Untersuchungen und Messungen - Dmpfung von Einmoden-Zentrierhlsen und/oder Adaptern mit gefederten Zentrierhlsen (IEC 61300-3-42:2007) This European Standard was approved by CENELEC on 2008-03-01. CENELEC members are bound to comply

10、 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 standards may be obtained on application to the Central Secre

11、tariat 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 notified to the Central Secretariat has the same status as t

12、he official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, P

13、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 86B/2600/FDIS, future edition 1 of IEC 61300-2-42, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the I

14、EC-CENELEC parallel vote and was approved by CENELEC as EN 61300-2-42 on 2008-03-01. 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) 2008-12-01 latest date by which the nation

15、al standards conflicting with the EN have to be withdrawn (dow) 2011-03-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-2-42:2007 was approved by CENELEC as a European Standard without any modification. _ BS EN 61300-3-42:2008 2 CONTENTS 1

16、 Scope.4 2 Normative references .4 3 General description 4 3.1 Attenuation4 3.2 Precautions in measuring attenuation5 4 Apparatus.5 4.1 Launch conditions and source (S) .5 4.2 Power meter (D)5 4.3 Reference plugs (RP) 6 4.4 Reference adaptors (Ar) 6 4.5 Mode filter (mf)6 5 Procedure 6 5.1 Pre-condit

17、ioning 6 5.2 Visual inspection .7 5.3 Attenuation measurement7 5.4 Procedure for measuring 8-position adaptor attenuation:.7 6 Details to be specified 8 Annex A (informative) Example results sheet .9 Bibliography10 Figure 1 Measurement of P07 Figure 2 Measurement of P17 Figure A.1 Example of results

18、 sheet.9 Table 1 Preferred source and launch conditions.5 Table 2 Preferred power-meter parameters6 BS EN 61300-3-42:2008 3 Annex ZA (normative) Normative references to international publications with theircorresponding European publications11FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENT

19、S BASIC TEST AND MEASUREMENT PROCEDURES Part 3-42: Examinations and measurements Attenuation of single mode alignment sleeves and or adaptors with resilient alignment sleeves 1 Scope This part of IEC 61300 describes the method to measure the attenuation of single mode adaptors with resilient sleeves

20、 and the attenuation of resilient sleeves. 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 edition of the referenced document (including any amen

21、dments) applies. IEC 61300-1:2003 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 1: General and guidance IEC 61300-3-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations and m

22、easurements Visual examination IEC 61300-3-35 PAS, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-35: Examinations and measurements Fibre optic cylindrical connector endface visual inspection IEC 61754 (all parts), Fibre optic connector interf

23、aces IEC 61755-3 (all parts) Fiber optic connector optical interfaces Part 3: Optical interface 3 General description 3.1 Attenuation Attenuation is intended to give a value for the decrease of useful power, expressed in decibels, resulting from the insertion of a device under test (DUT), within a l

24、ength of optical fibre cable. The DUT may have more than two optical ports (multiple adaptors). However, since an attenuation measurement is made across only two ports, the DUTs in this standard shall be described as having two ports. The reference method for measuring attenuation is with an optical

25、 power meter. The measured attenuation is a result of the lateral offset between the fibre cores of the used connectors and the interaction between sleeve geometry and ferrule outer diameter. BS EN 61300-3-42:2008 4 3.2 Precautions in measuring attenuation The following test precautions shall be tak

26、en. The power in the fibre shall not be at a level high enough to generate non-linear scattering effects. A recommended level is less than 0 dBm. The position of the fibres in the test should be fixed between the measurement of P0and P1to avoid changes in attenuation due to bending loss. The relativ

27、e rotation of the 2 plugs during the test shall be less than 5 4 Apparatus 4.1 Launch conditions and source (S) Unless otherwise specified, the launch condition shall be in accordance with Annex B of IEC 61300-1. The source unit consists of an optical emitter, the associated drive electronics and fi

28、bre pigtail (if any). The preferred source and launch conditions are given in Table 1 below. Table 1 Preferred source and launch conditions Number Type Centre wavelengthnm Spectral width nm Stabilityat 23 oC dB/h Launch conditions (Annex B, IEC 61300-1) Source type S4 Single-mode 1 310 30 120 0,05 B

29、.2.2 LED NOTE For this measurement method an LED is chosen to avoid influences of polarisation sensitivity of the measurement set up. 4.2 Power meter (D) The power-meter unit consists of an optical detector, the mechanism for connecting to it and associated detection electronics. The connection to t

30、he detector will be with an adaptor that accepts a connector plug of the appropriate design. The measurement system shall be stable within specified limits over the period of time required to measure P0and P1. For measurements where the connection to the detector must be broken between the measureme

31、nt of P0and P1, the measurement repeatability shall be within 0,02 dB. A detector with a large sensitive area may be used to 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 measur

32、ing the power level exiting from the DUT at the wavelength being measured. The preferred power-meter parameters are given below in Table 2. BS EN 61300-3-42:2008 5 Table 2 Preferred power-meter parameters Number Type Linearity dB Accuracy D2 Single-mode 0,02 (from 30 dBm to 40 dBm) 5 % NOTE 1 In ord

33、er to ensure that all light exiting the fibre is detected by the power meter, the sensitive area of the detector and the relative position between it and the fibre should be compatible with the numerical aperture of the fibre. NOTE 2 The power-meter stability should be 0,02 dB over the measurement t

34、ime 4.3 Reference plugs (RP) Reference plugs are required to form complete connector assemblies in all of the test methods, the reference plugs become in effect a part of the DUT during the measurement of attenuation. Reference plugs shall be as specified in this clause. The maximum attenuation betw

35、een two reference plugs shall be 0,03 dB when measured in 8 positions, in a reference adaptor. The reference plugs shall be of the same interface family from the IEC 61754 series. Endface geometry as specified in the IEC 61755-3 series for cylindrical ferrules (Part 3 optical interface) shall be met

36、. Care should be taken to ensure that influence on the measured attenuation is only a result of the lateral offset between the fibre cores. Additional attenuation caused by mode field diameter mismatch and angular misalignment shall be avoided by ensuring that the reference plugs are terminated on t

37、he cable sourced from the same cable sample, using plugs with angular misalignment 0,2. The OD (outer diameter) of the ferrule of the reference plugs shall be in agreement with the IEC 61755-3 series for cylindrical ferrules. For 2,5 mm ferrules the OD shall be minimum 2,498 5mm and maximum 2,499 5

38、mm. For 1,25 mm ferrules the OD shall be minimum 1,248 5mm and maximum 1,249 5 mm. 4.4 Reference adaptors (Ar) Reference adaptors are required to test the reference connectors. Reference adaptors are adaptors of superior performance selected from the population of normal adaptors by the process in 5

39、.4. Reference adapters will give lower loss than average when used with reference connectors. Reference adaptors shall meet all dimensional requirements as stated in the relevant connector interface standard of the IEC 61754 series. 4.5 Mode filter (mf) For single-mode measurements the mode filter s

40、hall include at least two metres of fibre with two loops of 50 mm diameter placed in the cord attached to the source. 5 Procedure 5.1 Pre-conditioning The optical interfaces of the DUT shall be clean and free from any debris likely to affect the performance of the test and any resultant measurements

41、. Clean dry air shall be used to remove free particles from mating surfaces on the inside of the adaptor and outside of the connector housing. The inside of the sleeve shall be cleaned according to the manufacturers instructions. BS EN 61300-3-42:2008 6 The DUT shall be allowed to stabilize at room

42、temperature for at least 1 h prior to testing. NOTE Care should be exercised throughout the test to ensure that mating surfaces are not contaminated with oil or grease. It is recognized that bare fingers can deposit a film of grease. 5.2 Visual inspection The optical interfaces shall be free from de

43、fects or damage which may affect the performance of the test and any resultant measurements. It is recommended that a visual inspection of the optical interfaces of the DUT is made in accordance with IEC 61300-3-1 prior to the start of the test. The end faces of the reference plugs shall be examined

44、 according to IEC 61300-3-35 PAS. Clean dry air shall be used to remove free particles from mating surfaces on the inside of the adaptor and outside of the connector housing. The inside of the sleeve shall be cleaned according the manufacturers instructions. 5.3 Attenuation measurement Two measureme

45、nts of power are required for each measurement of attenuation, A, with a power meter where P1 is the measurement of power with the DUT in the circuit and P0 is the measurement of power without the DUT in the circuit. P0is measured with the test patch cord connected between the detector and the lead

46、from the temporary joint with the reference plug (RP) (see Figure 1). P0 TJ RP S mf D Figure 1 Measurement of P0The DUT and another reference plug are added, to measure P1(see Figure 2). TJ P1RPS mfD DUTRPFigure 2 Measurement of P1The attenuation is then calculated: 01log10PPA = dB 5.4 Procedure for

47、 measuring 8-position adaptor attenuation: The measurement over 8 positions is according to the 3, 6, 9 and 12 oclock position of the alignment sleeve. The tolerance on these positions is +/- 10 degrees. A cleaning stick might be used to place the slit of the alignment sleeve in the required positio

48、n. After the first four measurements the adaptor is reversed and the sleeve is placed again in the positions 3,6,9 and 12 oclock. In each position both reference plugs are inserted and the measured attenuation is recorded. For each adaptor a total of 8 measurements are taken. All results should be r

49、ecorded. Annex A provides an example. BS EN 61300-3-42:2008 7 After the first four measurements, both ferrule end faces are inspected for damage that may degrade the performance of these reference plugs. When the end faces meet the requirements of the relevant document (default document is IEC 61300-3-35 PAS) the next adaptor might be measured. If they do not meet the end face requirements replace them with new reference plugs. 6 Details to be specified Type of a