SANS 61300-3-34-2009 Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 3-34 Examinations and measurements - Attenuation of ran.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22552-0 SANS 61300-3-34:2009Edition 3IEC 61300-3-34:2009Edition 3SOUTH AFRICAN NATIONAL STANDARD Fibre optic interconnecting devices and p

4、assive components Basic test and measurement procedures Part 3-34: Examinations and measurements Attenuation of random mated connectors This national standard is the identical implementation of IEC 61300-3-34:2009 and is adopted with the permission of the International Electrotechnical Commission. P

5、ublished by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 61300-3-34:2009 Edition 3 IEC 61300-3-34:2009 Edition 3 Table of changes Change No. Date Scope National foreword This South African standa

6、rd was approved by National Committee SABS SC 74A, Communication technology Fibre optics, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March 2009. This SANS document supersedes SANS 61300-3-34:2

7、002 (edition 2). IEC 61300-3-34Edition 3.0 2009-01INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-34: Examinations and measurements Attenuation of random mated connectors INTERNATIONAL ELECTROTECHNICAL COMMISSION MICS 33.

8、180.20 PRICE CODEISBN 2-8318-1022-8 Registered trademark of the International Electrotechnical Commission SANS 61300-3-34:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 2 61300-3-34 IEC:2009(E) CONTENTS FOREWORD.3 1 Scope.5 2 Normative

9、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 1 .7 5.2 Method 2 .10 5.3 Analysis of results .13 6 Details to be specified 13 Figure 1 “Reference” patchcord measurement

10、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 patchcord measurement Method 2.11 Figure 6 Test matrix for measurement method 2 12 SANS 61300-3-34:2009This s tandard may

11、only be used and printed by approved subscription and freemailing clients of the SABS .61300-3-34 IEC:2009(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-34: Examinations and measurements Attenu

12、ation of random mated connectors FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions

13、concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”).

14、 Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborat

15、es closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the

16、 relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that

17、 the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the ma

18、ximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsi

19、ble for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical

20、committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publi

21、cations. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

22、patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61300-3-34 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components of IEC technical committee 86: Fibre optics. This third edition canc

23、els and replaces the second edition published in 2001. It constitutes a technical revision. Changes from the previous edition of the document are to reconsider launch conditions for multimode fibres. The text of this standard is based on the following documents: FDIS Report on voting 86B/2767/FDIS 8

24、6B/2800/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. SANS 61300-3-34:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 4 61300-3-34 IEC:2009(E) This

25、 publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 61300 series, published under the general title, Fibre optic interconnecting devices and passive components Basic test and measurement procedures can be found on the IEC website. The committee

26、 has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised

27、edition, or amended. A bilingual version of this publication may be issued at a later date. SANS 61300-3-34:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61300-3-34 IEC:2009(E) 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENT

28、S BASIC TEST AND MEASUREMENT PROCEDURES Part 3-34: Examinations and measurements Attenuation of random mated connectors 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 refere

29、nces 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 amendments) applies. IEC 61300-1, Fibre optic interconnecting dev

30、ices 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 measurements Visual examination 3 General description 3.1 Test met

31、hods Two test methods are described for measuring the attenuation of random mated optical connectors. Both provide 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

32、 patchcords, and any adaptors, must be chosen at random to ensure that the measurements provide a statistically unbiased 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 “refer

33、ence” plugs and all of the remaining plugs are tested against them. The result is based on 360 measurements as indicated 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 wou

34、ld be relied on to maintain process control. However, in the event of a dispute, Method 1 shall act as the reference 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 patc

35、hcords being nominated as a “reference” plug. All plugs of the remaining 10 patchcords are then tested against each of the five “reference” plugs. This produces 100 measurements as indicated in the test matrix shown in Figure 6. SANS 61300-3-34:2009This s tandard may only be used and printed by appr

36、oved subscription and freemailing clients of the SABS . 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 or supplier produced products. In this case, as indicated above, Method 2 may be

37、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 comparative measurements are made. It is not intended that the terms should imply specially

38、 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 do not affect the measurement. Cladding modes shall be stripped as a function of th

39、e 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 stability performance of the test equipment shall be 0,05 dB or 10 % of the attenuation

40、 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 singlemode. 3.2.4 To achieve consistent results, clean and inspect all connectors

41、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 Apparatus 4.1 Source (S) The source consists of an optical emitter, the means to connec

42、t 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 product standard; Spectral width: filtered LED 150 nm FWHM; Spectral width: LD 10 nm

43、 FWHM. For multimode fibres, broadband sources such as an LED shall be used. SANS 61300-3-34:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .61300-3-34 IEC:2009(E) 7 For singlemode fibres either an LED or LD may be used. NOTE The interfer

44、ence of modes from a coherent 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 impos

45、sible to achieve stable 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 speci

46、fied in accordance with 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

47、all light emitted by the 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 ref

48、erenced to a power level 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

49、 detector 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 measuring the power level exiting from the DUT at the wavelength being measured. 5 Procedure 5.1 Method 1 5.1.1 Randomly choose 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 c