1、 IEC 61300-3-34 Edition 3.0 2009-01 INTERNATIONAL STANDARD Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-34: Examinations and measurements Attenuation of random mated connectors IEC 61300-3-34:2009(E) THIS PUBLICATION IS COPYRIGHT PROTECTED C
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9、03 00 IEC 61300-3-34 Edition 3.0 2009-01 INTERNATIONAL 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 M ICS 33.180.20 P
10、RICE CODE ISBN 2-8318-1022-8 Registered trademark of the International Electrotechnical Commission 2 61300-3-34 IEC:2009(E) CONTENTS FOREWORD.3 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
11、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 Method 1 .8 Figure 2 Test patchcord measurement Method 1.8 Figure 3 Test matrix for measurement method 1 10 Figure 4 “Reference” patchco
12、rd measurement Method 2 .11 Figure 5 Test patchcord measurement Method 2.11 Figure 6 Test matrix for measurement method 2 12 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
13、: Examinations and measurements Attenuation 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 intern
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22、 IEC Publication or any other IEC Publications. 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
23、 IEC Publication may be the subject of 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
24、: Fibre optics. This third edition cancels 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
25、: FDIS Report on voting 86B/2767/FDIS 86B/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. 4 61300-3-34 IEC:2009(E) This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list
26、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 has decided that the contents of this publication will remain unchanged until the maint
27、enance 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 edition, or amended. A bilingual version of this publication may be issued at a later da
28、te. 61300-3-34 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 connectors 1 Scope This part of IEC 61300 describes the procedure required to measure the statistical dis
29、tribution 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 references, only the edition cited applies. For undated references, the latest edition of the referenced doc
30、ument (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, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-
31、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 provide an estimate of the expected average performance that a group of patchcords (including adaptors, if
32、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 unbiased estimate. Method 1 describes the procedure based on the use of 10 patchcords (20 optical conn
33、ectors) 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 indicated in the test matrix shown in Figure 3. Method 1 is intended to be part of a design approval ex
34、ercise 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 reference measurement method. Method 2 describes a procedure based on the measurement of 15 patchcords. Fiv
35、e 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 each of the five “reference” plugs. This produces 100 measurements as indicated in the test matrix show
36、n in Figure 6. 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 used as an alternative option. NOTE In th
37、is 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 chosen or manufactured components, such
38、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 the fibre coating. 3.2.2 Precautions shall
39、be taken to ensure the position of the fibres in the test remains fixed between the measurement of P 1and P 2to 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 to be measured, whichever is the lower
40、 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 and adaptors prior to measurement. Visu
41、al 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 connect to it and associated drive electronic
42、s. 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 FWHM. For multimode fibres, broadband
43、sources such as an LED shall be used. 61300-3-34 IEC:2009(E) 7 For singlemode fibres either an LED or LD may be used. NOTE The interference 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
44、 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 launch conditions using coherent sources for multimode measurements. Consequently, lasers, including OTDR sources, should be avoided in favou
45、r of LEDs or other incoherent sources for measuring multimode components. 4.2 Launch conditions (E) The launch condition shall be specified 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.
46、 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 the connector plug. In addition to meeting the stability and resolution requirements, the detector shall have the following characteristics: Lin
47、earity: 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 level of 23 dBm at the operational wavelength. Where the connection to the detector is broken between the measurement of P 1 and P 2 , the measure
48、ment 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 to achieve this. The precise characteristics of the detector shall be compatible with the measurement requirements. The dynamic range of the
49、 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 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
