1、BSI Standards PublicationFibre optic interconnectingdevices and passive componentsPart 08: Study of optical power blocking measurement methods for adaptors with an optical power blocking shutterPD IEC/TR 62627-08:2016National forewordThis Published Document is the UK implementation of IEC/TR62627-08
2、:2016.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre opticinterconnecting devices and passive components.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publicatio
3、n does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 89225 7ICS 33.180.20Compliance with a British Standard cannot confer immunity froml
4、egal obligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 January 2016.Amendments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENTPD IEC/TR 62627-08:2016IEC TR 62627-08 Edition 1.0 2016-01 TECHNICAL REPORT Fi
5、bre optic interconnecting devices and passive components Part 08: Study of optical power blocking measurement methods for adaptors with an optical power blocking shutter INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.180.20 ISBN 978-2-8322-3119-7 Registered trademark of the International Electrote
6、chnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinsidePD IEC/TR 62627-08:2016 2 IEC TR 62627-08:2016 IEC 2016 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and definitions 7 4 Background to the measure
7、ment method of blocking characteristics for adaptors with an optical power blocking shutter . 7 4.1 Laser safety requirement for optical fibre communication systems 7 4.2 Required performance of the power blocking shutter . 8 4.3 Standard measurement conditions used to determine laser safety for opt
8、ical fibre communication systems 8 5 Measurement methods used in this Technical Report 8 5.1 Background. 8 5.2 Test 8 5.2.1 Measurement set-up 8 5.2.2 Study of dynamic range . 9 5.2.3 Light source and optical detector . 9 5.2.4 Measurement environment . 10 5.3 Measurement of the maximum emitted opti
9、cal power 10 5.4 Measuring system dynamic range . 10 5.5 Measuring the level of optical power blocking . 10 6 Demonstration of measurement . 11 6.1 Common measurement conditions 11 6.2 Measurement set-up . 11 6.2.1 Method 1 . 11 6.2.2 Method 2 . 13 6.3 Dynamic range 14 6.3.1 Method 1 . 14 6.3.2 Meth
10、od 2 . 15 6.3.3 Samples measured 15 6.4 Measurement results . 15 6.5 Study of the factors affecting measurement uncertainty 17 7 Summary . 18 (informative) Observation of emitted light using a visible light source . 19 Annex A(informative) Detailed measured levels of blocking characteristics (Measur
11、ed Annex Bvalues of light quantity shielded by adaptors with an optical power blocking shutter) 20 Bibliography 24 Figure 1 Example of measurement set-up for Method 1 . 9 Figure 2 Example of measurement set-up for Method 2 . 9 Figure 3 Measurement set-up, Method 1 13 Figure 4 Measurement set-up, Met
12、hod 2 14 Figure 5 Comparison between average of optical power blocking and the standard deviations (Type SC, wavelength of 1 310 nm) . 16 PD IEC/TR 62627-08:2016IEC TR 62627-08:2016 IEC 2016 3 Figure 6 Comparison between average of optical power blocking and the standard deviations (Type SC, wavelen
13、gth of 1 550 nm) . 16 Figure 7 Comparison between average of optical power blocking and the standard deviations (Type LC, wavelength of 1 310 nm) 17 Figure 8 Comparison between average of optical power blocking and the standard deviations (Type LC, wavelength of 1 550 nm) 17 Figure A.1 Example of of
14、f-axis emitted visible light (Type LC duplex adaptor with an optical power blocking shutter) 19 Table 1 Common measurement conditions . 11 Table 2 Details of apparatus used for Method 1 . 12 Table 3 Details of apparatus used for Method 2 . 14 Table 4 Adaptors with an optical power blocking shutter 1
15、5 Table B.1 Measured values of optical power blocking (Type SC, measured wavelength of 1 310 nm) . 20 Table B.2 Measured values of optical power blocking (Type SC, measured wavelength of 1 550 nm) . 21 Table B.3 Measured values of optical power blocking (Type LC, measured wavelength of 1 310 nm) for
16、 non-angled PC end face . 21 Table B.4 Measured values of optical power blocking (Type LC, measured wavelength of 1 310 nm) for 8 degree-angled PC end face . 22 Table B.5 Measured values of optical power blocking (Type LC, measured wavelength of 1 550 nm) for non-angled PC end face . 22 Table B.6 Me
17、asured values of optical power blocking (Type LC, measured wavelength of 1 550 nm) for 8 degree-angled PC end face . 23 PD IEC/TR 62627-08:2016 4 IEC TR 62627-08:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS Part 08: Study of opt
18、ical power blocking measurement methods for adaptors with an optical power blocking shutter 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
19、 is to promote international co-operation on all questions 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)
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21、he IEC also participate in this preparation. IEC collaborates 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 nearl
22、y as possible, an international consensus of opinion on the 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
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27、rect 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 Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispen
28、sable 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 patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical commi
29、ttees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC TR 62627-08, which is a
30、 Technical Report, has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. PD IEC/TR 62627-08:2016IEC TR 62627-08:2016 IEC 2016 5 The text of this Technical Report is based on the following documents: Enquiry dra
31、ft Report on voting 86B/3931/DTR 86B/3945/RVC Full information on the voting for the approval of this Technical Report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IE
32、C 62627 series, published under the general title Fibre optic interconnecting devices and passive components, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under “http:/webs
33、tore.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 date. IMPORTANT The colour inside logo on the cover page of this pub
34、lication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. PD IEC/TR 62627-08:2016 6 IEC TR 62627-08:2016 IEC 2016 INTRODUCTION In recent years, optical communication
35、networks have made greater use of optical fibre amplifiers and distributed Raman amplifiers. Optical communication equipment usually has an adaptor on the front of the board as an optical input/output terminal. These adaptors sometimes emit 100 mW or higher optical power. For the purpose of blocking
36、 such optical power, an adaptor with an optical power blocking shutter is sometimes used. This Technical Report details the proposed methods to evaluate the efficacy of these adaptor shutters. This Technical Report is based on Optoelectronic Industry and Technology Development Association (OITDA) Te
37、chnical Paper (TP), TP19/CN-2014, Investigation of examinations and measurements Light-blocking performance of optical adaptor with shutter. PD IEC/TR 62627-08:2016IEC TR 62627-08:2016 IEC 2016 7 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS Part 08: Study of optical power blocking meas
38、urement methods for adaptors with an optical power blocking shutter 1 Scope This part of IEC 62627, which is a Technical Report, describes two methods used to measure the blocking characteristics of adaptors with an optical power blocking shutter. This document focuses on singlemode fibre (SMF) and
39、two wavelengths, 1 310 nm and 1 550 nm. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
40、referenced document (including any amendments) applies. Void. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 adaptor with an optical power blocking shutter adaptor defined in IEC 61274-1 that has a shutter to block optical power emitted from
41、 its aperture Note 1 to entry: An adaptor with a shutter may have a structure such that the shutter automatically moves to block the aperture when the outer plug is removed. There are two commercially available types of optical adaptors with shutters: one type blocks optical power and the other type
42、 blocks dust ingress. Products that focus on optical power blocking may have a metal shutter. 3.2 optical power blocking attenuation abcalculated by measuring the maximum emitted optical power when the shutter is fully open (or the shutter is removed) (P0max) and the maximum emitted optical power wh
43、en the shutter is closed (P1max) ( )dBlog 100max1max10b=PPa (1) 4 Background to the measurement method of blocking characteristics for adaptors with an optical power blocking shutter 4.1 Laser safety requirement for optical fibre communication systems The safety of laser products are defined in IEC
44、60825-1 which prescribes the acceptable optical power as the laser safety class. IEC 60825-2, a subdivision standard, provides the safety standards for optical fibre communication systems. Optical communication equipment PD IEC/TR 62627-08:2016 8 IEC TR 62627-08:2016 IEC 2016 manufacturers sometimes
45、 use an adaptor with an optical power blocking shutter to comply with these laser safety standards. 4.2 Required performance of the power blocking shutter IEC 60825-2, hazard level 3B, limits optical power at 1 550 nm to 500 mW. However, hazard level 1, the optical power allowed to be seen by the na
46、ked eye or with a magnifying scope, is limited to 10,2 mW. If equipment manufacturers ensure laser safety only by using an adaptor with an optical power blocking shutter, the required level of optical power blocking for the shutter is 17 dB, i.e. the ratio of 500 mW to 10,2 mW. 4.3 Standard measurem
47、ent conditions used to determine laser safety for optical fibre communication systems IEC 60825-2 defines the measurement conditions used to determine the hazard level of optical fibre communication systems. For wavelengths greater than 1 400 nm, an aperture diameter of 7 mm is used at a measurement
48、 distance of 28 mm from the radiating end of the optical fibre. For wavelengths less than or equal to 1 400 nm, the aperture diameter is also 7 mm, but the measurement distance is 70 mm from the radiating end of the optical fibre. 5 Measurement methods used in this Technical Report 5.1 Background Th
49、e following two methods have been studied. Method 1: measuring with an aperture diameter of 7 mm, an integrating sphere and an optical detector. Method 2: measuring with an optical detector only, having an aperture diameter of less than 7 mm. In this Technical Report only the 1 310 nm and 1 550 nm wavelengths have been focused upon as these are the ones most commonly used for optical fibre communication systems. 5.2 Test 5.2.1 Measurement set-up The measurement
