1、BSI Standards PublicationFibre optic interconnecting devices and passive components Basic test and measurement proceduresPart 3-50: Examinations and measurements Crosstalk for optical spatial switchesBS EN 61300-3-50:2013Incorporating corrigenda January 2015 and July 2015BS EN 61300-3-50:2013 BRITIS
2、H STANDARDNational forewordThis British Standard is the UK implementation of EN 61300-3-50:2013. It is identical to IEC 61300-3-50:2013, incorporating corrigenda January 2015 and July 2015.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommit
3、tee GEL/86/2, Fibre optic interconnecting devices and passive components.A list of organizations represented on this subcommittee 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
4、 application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 91463 8ICS 33.180.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strateg
5、y Committee on 31 August 2013.Amendments/corrigenda issued since publicationDate Text affectedImplementation of IEC corrigendum January 2015. Figure 3 and Figure 4 updated.Implementation of IEC corrigendum July 2015. 28 February 2015 30 September 2015The start and finish of text introduced or altere
6、d by corrigendum is indicated in the text by tags. Text altered by IEC corrigendum July 2015 is indicated in the text by . EUROPEAN STANDARDEN 61300-3-50NORME EUROPENNEEUROPISCHE NORMJuly 2013CENELECEuropean Committee for Electrotechnical StandardizationComit Europen de Normalisation Electrotechniqu
7、eEuropisches Komitee fr Elektrotechnische NormungManagement Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. EN 61300-3-50:2013 EICS 33.180.20English versionFibre optic interconnecting d
8、evices and passive components -Basic test and measurement procedures -Part 3-50: Examinations and measurements -Crosstalk for optical spatial switches(IEC 61300-3-50:2013)Dispositifs dinterconnexion et composants passifs fibres optiques -Procdures fondamentales dessais et de mesures -Partie 3-50: Ex
9、amens et mesures -Diaphonie relative aux commutateurs spatiaux optiques(CEI 61300-3-50:2013)Lichtwellenleiter -Verbindungselemente und passive Bauteile -Grundlegende Prf- und Messverfahren -Teil 3-50: Untersuchungen und Messungen -bersprechen bei rumlichen Umschaltern fr Lichtwellenleiter(IEC 61300-
10、3-50:2013)This European Standard was approved by CENELEC on 2013-06-21. CENELEC members are bound to comply 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 bibliog
11、raphical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 respon
12、sibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland
13、, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.BS EN 61300-3-50:2013EN 61300-3-
14、50:2013 - 2 -ForewordThe text of document 86B/3593/FDIS, future edition 1 of IEC 61300-3-50, prepared by IEC/TC 86B“Fibre optic interconnecting devices and passive components” of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61300-3-50:2013.The
15、 following dates are fixed: latest date by which the document has to beimplemented at national level bypublication of an identical nationalstandard or by endorsement(dop) 2014-03-21 latest date by which the nationalstandards conflicting with thedocument have to be withdrawn(dow) 2016-06-21Attention
16、is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights.Endorsement noticeThe text of the International Standard IEC 61300-3-50:2013 was approved by CENE
17、LEC as a European Standard without any modification.In the official version, for Bibliography, the following notes have to be added for the standards indicated:IEC 62074-1 NOTE Harmonised as EN 62074-1.IEC 61300-3-29 NOTE Harmonised as EN 61300-3-29.IEC 60876-1 NOTE Harmonised as EN 60876-1.BS EN 61
18、300-3-50:2013EN 61300-3-50:2013 - 2 -ForewordThe text of document 86B/3593/FDIS, future edition 1 of IEC 61300-3-50, prepared by IEC/TC 86B“Fibre optic interconnecting devices and passive components” of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC a
19、s EN 61300-3-50:2013.The following dates are fixed: latest date by which the document has to beimplemented at national level bypublication of an identical nationalstandard or by endorsement(dop) 2014-03-21 latest date by which the nationalstandards conflicting with thedocument have to be withdrawn(d
20、ow) 2016-06-21Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights.Endorsement noticeThe text of the International Standard IEC 61300-3-50:2
21、013 was approved by CENELEC as a European Standard without any modification.In the official version, for Bibliography, the following notes have to be added for the standards indicated:IEC 62074-1 NOTE Harmonised as EN 62074-1.IEC 61300-3-29 NOTE Harmonised as EN 61300-3-29.IEC 60876-1 NOTE Harmonise
22、d as EN 60876-1.BS EN 61300-3-50:2013- 3 - EN 61300-3-50:2013Annex ZA (normative)Normative references to international publicationswith their corresponding European publicationsThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its app
23、lication. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
24、Publication Year Title EN/HD YearIEC 61300-1 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures -Part 1: General and guidanceEN 61300-1 -IEC 61300-3-2 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedure
25、s -Part 3-2: Examinations and measurements -Polarization dependent loss in a single-mode fibre optic deviceEN 61300-3-2 -BS EN 61300-3-50:2013 4 61300-3-50 IEC:2013 CONTENTS 1 Scope . 5 2 Normative references . 5 3 General description 5 4 Apparatus . 6 4.1 Light source S . 6 4.2 Temporary joint TJ 7
26、 4.3 Terminations T 7 4.4 Detector D . 7 5 Measurement procedure . 7 5.1 General . 7 5.2 Test set-up 7 5.3 Measurement of P1. 8 5.4 Measurement of P2. 8 5.5 Measurement of Pi(i=3 to N) . 9 5.6 Measurement for other input ports . 9 6 Calculation . 9 6.1 Calculation of crosstalk for specified port pai
27、rs 9 6.2 Calculation of total crosstalk for a specified output port . 10 6.3 Crosstalk of M x N fibre optic switch 10 6.4 Total crosstalk of M x N fibre optic switch 10 7 Details to be specified 10 7.1 Light source 10 7.2 Temporary joint . 11 7.3 Terminations . 11 7.4 Detector 11 7.5 DUT 11 7.6 Othe
28、rs . 11 Bibliography 12 Figure 1 Crosstalk for N x 1 optical switch . 6 Figure 2 Measurement set-up of crosstalk for 1 x N optical switch . 6 Figure 3 Measurement setup of P18 Figure 4 Measurement set-up of P2. 9 BS EN 61300-3-50:2013 2 61300-3-50 IEC:2013 CONTENTS 1 Scope . 5 2 Normative references
29、 . 5 3 General description 5 4 Apparatus . 6 4.1 Light source S . 6 4.2 Temporary joint TJ 7 4.3 Terminations T 7 4.4 Detector D . 7 5 Measurement procedure . 7 5.1 General . 7 5.2 Test set-up 7 5.3 Measurement of P1. 8 5.4 Measurement of P2. 8 5.5 Measurement of Pi(i=3 to N) . 9 5.6 Measurement for
30、 other input ports . 9 6 Calculation . 9 6.1 Calculation of crosstalk for specified port pairs 9 6.2 Calculation of total crosstalk for a specified output port . 10 6.3 Crosstalk of M x N fibre optic switch 10 6.4 Total crosstalk of M x N fibre optic switch 10 7 Details to be specified 10 7.1 Light
31、source 10 7.2 Temporary joint . 11 7.3 Terminations . 11 7.4 Detector 11 7.5 DUT 11 7.6 Others . 11 Bibliography 12 Figure 1 Crosstalk for N x 1 optical switch . 6 Figure 2 Measurement set-up of crosstalk for 1 x N optical switch . 6 Figure 3 Measurement setup of P18 Figure 4 Measurement set-up of P
32、2. 9 BS EN 61300-3-50:201361300-3-50 IEC:2013 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-50: Examinations and measurements Crosstalk for optical spatial switches 1 Scope This part of IEC 61300 describes the procedure to measure the cross
33、talk of optical signals between the ports of a multiport M x N (M input ports and N output ports) fibre optic spatial switch. The crosstalk is defined as the ratio of the optical power at an output port which comes from the unconnected input port, to the optical power at the output port which comes
34、from the connected input port. 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 reference
35、d document (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 61300-3-2, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Pa
36、rt 3-2: Examinations and measurements Polarization dependent loss in a single-mode fibre optic device 3 General description The general meaning of crosstalk is the ratio of an undesired signal power to a desired signal power. The crosstalk of N x 1 (N input ports and one output port) fibre optic spa
37、tial switches is shown in Figure 1. For an N x M (N input ports and M output ports) fibre optic switch, the crosstalk is the same as that for an N x 1 optical switch but expanded across M output ports. A fibre optic switch is basically bidirectional, i.e. a 1 x N (1 input port and N output ports) op
38、tical switches can operate as an N x 1 (N input ports and 1 output port) switch. The crosstalk for an N x 1 optical switch is measured as a 1 x N optical switch, as shown in Figure 2. When the input port for a 1 x N optical switch is connected to a light source, the crosstalk for a transmitting outp
39、ut port versus an isolated output port is the ratio of output power of these two output ports, expressed in decibels. Crosstalk is a negative value in dB. Do not use “isolation” in place of “crosstalk” as the two have a different values and meanings. The meaning of isolation is the optical loss for
40、a port pair intended to block transmission, i.e. for which loss is nominally infinite. Isolation is a positive value in dB. Crosstalk is a negative value in dB. NOTE 1 For WDM devices, crosstalk is defined as the value of the ratio between the optical power of the specified signal and all noise, as
41、defined in IEC 62074-1 11. The crosstalk for WDM devices is generally used as _ 1Numbers in square brackets refer to the Bibliography. BS EN 61300-3-50:2013 6 61300-3-50 IEC:2013 not simply “crosstalk”, but “some prefix” crosstalk, such as adjacent channel crosstalk, total crosstalk and so on. The m
42、easurement method of crosstalk for DWDM devices are described in IEC 61300-3-29 2. N 1 optical switchPort 1 (signal 1)Port 2 (signal 2)Port n (signal n)Common port (signal 1, and the sum of signals (2 n) as noise) IEC 959/13 Figure 1 Crosstalk for N x 1 optical switch 1 N optical switchLight source
43、Port 1 (transmitting port)Port 2 (isolated port)Port n (isolated port)Optical detector 1 Optical detector n . . . IEC 960/13 Figure 2 Measurement set-up of crosstalk for 1 x N optical switch For single mode fibre optic switches, the crosstalk may depend on the polarization state of the input light.
44、A polarization state change system (PSCS; a polarization controller or a polarization scrambler) should be used with a light source. In this case, the crosstalk is generally defined as the maximum value of the measured crosstalk for all polarization states of the input light. For multi-mode fibre op
45、tic switches, the launch mode of input light shall be in accordance with IEC 61300-1. Since, in practice the crosstalk levels of fibre optic switches can be very small, (of the order of under 70 dB), the measurement can be degraded by several factors. Therefore, this procedure is designed to either
46、circumvent these factors, or to point them out so that adequate care can be taken and the right choice of test apparatus made. Factors which can degrade a measurement of crosstalk include: the coupling of ambient light into measurement channels; the reflection of light from the ends of fibre pigtail
47、s; the light carried in cladding modes; the uncertainty of the power meter at low light levels; the fibre pigtail lengths since light can scatter (Rayleigh scattering) along the pigtails. 4 Apparatus 4.1 Light source S The light source is pigtailed or connected to a launch optical fibre compatible w
48、ith the input port of the device under test (DUT). It is also designed and conditioned to achieve the required launch conditions as stated in IEC 61300-1. For measurements of DUTs which are not inherently broadband in optical performance, the spectral output of the light source shall be characterize
49、d not only in the vicinity of the operating wavelength range by means of full BS EN 61300-3-50:2013 6 61300-3-50 IEC:2013 not simply “crosstalk”, but “some prefix” crosstalk, such as adjacent channel crosstalk, total crosstalk and so on. The measurement method of crosstalk for DWDM devices are described in IEC 61300-3-29 2. N 1 optical switchPort 1 (signal 1)Port 2 (signal 2)Port n (signal n)Common port (signal 1, and the sum of signals (2 n) as noise) IEC 95
