1、BSI Standards Publication Fibre optic interconnecting devices and passive components Part 08: Study of optical power blocking measurement methods for adaptors with an optical power blocking shutter PD IEC/TR 62627-08:2016National foreword This Published Document is the UK implementation of IEC/TR 62
2、627-08:2016. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Fibre optic interconnecting devices and passive components. A list of organizations represented on this committee can be obtained on request to its secretary. Thi
3、s publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 89225 7 ICS 33.180.20 Compliance with a British Standard cannot conf
4、er immunity from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 January 2016. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD IEC/TR 62627-08:2016 IEC TR 62627-08 Edition 1.0 20
5、16-01 TECHNICAL REPORT Fibre 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 th
6、e International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside PD 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
7、4 Background to the measurement 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 det
8、ermine laser safety for optical 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
9、of the maximum emitted optical 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
10、.1 Method 1 . 14 6.3.2 Method 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 block
11、ing characteristics (Measured Annex B values 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 Figu
12、re 4 Measurement set-up, Method 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
13、deviations (Type SC, wavelength 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)
14、 17 Figure A.1 Example of off-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 opti
15、cal power blocking shutter 15 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
16、 wavelength of 1 310 nm) for 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 P
17、C end face . 22 Table B.6 Measured 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 COMP
18、ONENTS Part 08: Study of optical 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 Co
19、mmittees). The object of IEC 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 Ava
20、ilable Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). 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
21、organizations liaising with the 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 techni
22、cal matters express, as nearly 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
23、 National Committees in that sense. While all reasonable efforts are made to ensure that 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 uniform
24、ity, IEC National Committees undertake to apply IEC Publications transparently to the maximum 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) IE
25、C itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure
26、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 committees and IEC National Committees for any personal injury, property damage or other damage of any
27、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 Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the refere
28、nced 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 patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The mai
29、n task of IEC technical committees 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“
30、. IEC TR 62627-08, which is a 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 fol
31、lowing documents: Enquiry draft 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.
32、A list of all parts in the IEC 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
33、IEC website 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 date. IMPORTANT The colour inside logo
34、on the cover page of this publication 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
35、years, optical communication 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
36、. For the purpose of blocking 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 Devel
37、opment Association (OITDA) Technical 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 o
38、f optical power blocking measurement 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 o
39、n singlemode fibre (SMF) and 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 reference
40、s, the latest edition of the 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 blo
41、ck optical power emitted from 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 opt
42、ical power and the other type blocks dust ingress. Products that focus on optical power blocking may have a metal shutter. 3.2 optical power blocking attenuation a bcalculated by measuring the maximum emitted optical power when the shutter is fully open (or the shutter is removed) (P 0max ) and the
43、maximum emitted optical power when the shutter is closed (P 1max ) ( ) dB log 10 0max 1max 10 b = P P a (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
44、safety of laser products are defined in IEC 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 62
45、627-08:2016 IEC 2016 manufacturers sometimes 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, th
46、e optical power allowed to be seen by the naked 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
47、 of 500 mW to 10,2 mW. 4.3 Standard measurement 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 apertu
48、re diameter of 7 mm is used at a measurement 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 use
49、d in this Technical Report 5.1 Background The 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 system
