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1、BRITISH STANDARD BS EN 61300-3-7:2001 IEC 61300-3-7:2000 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-7: Examinations and measurements Wavelength dependence of attenuation and return loss The European Standard EN 61300-3-7:2001 has the statu
2、s of a British Standard ICS 33.180.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-3-7:2001 This British Standard, having been prepared under the direction
3、 of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2001 BSI 05-2001 ISBN 0 580 37305 3 National foreword This British Standard is the official English language version of EN 61300-3-7:2001. It is identical with IEC
4、61300-3-7:2000. The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/2, Interconnecting devices and passive components, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on re
5、quest to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from bo
6、th systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European pu
7、blications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. User
8、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, o
9、r proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. T
10、he BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARDEN 61300-3-7 NORME EUROP
11、ENNE EUROPISCHE NORMFebruary 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC -All rights of exploitation in an
12、y form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-3-7:2001 E ICS 33.180.20 English version Fibre optic interconnecting devices and passive components - Basic test and measurement procedures Part 3-7: Examinations and measurements - Wavelength dependence of attenuation
13、 and return loss (IEC 61300-3-7:2000) Dispositifs dinterconnexion et composants passifs fibres optiques - Mthodes fondamentales dessais et de mesures Partie 3-7: Examens et mesures - Affaiblissement et pertes par rflexion en fonction de la longueur donde (CEI 61300-3-7:2000) Lichtwellenleiter - Verb
14、indungselemente und passive Bauteile - Grundlegende Prf- und Meverfahren Teil 3-7: Untersuchungen und Messungen - Wellenlngenabhngigkeit von Dmpfung und Rckstreudmpfung (IEC 61300-3-7:2000) This European Standard was approved by CENELEC on 2001-01-01. CENELEC members are bound to comply with the CEN
15、/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 bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to
16、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 responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official v
17、ersions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffiel
18、dun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 86B/1386/FDIS, future edition 1 of IEC 61300-3-7, prepared by SC 86B, Fibre optic interconnecting devices and passive components, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC paralle
19、l vote and was approved by CENELEC as EN 61300-3-7 on 2001-01-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop)2001-10-01 latest date by which the national standards conflict
20、ing with the EN have to be withdrawn(dow)2004-01-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-3-7:2000 was approved by CENELEC
21、 as a European Standard without any modification. _ Page 2 EN 6130037:2001 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? BSI 05-2001 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-
22、7: Examinations and measurements Wavelength dependence of attenuation and return loss 1 Scope The purpose of this part of IEC 61300 is to measure the wavelength dependence of attenuation and return loss at the same time, in a single mode fibre optic device under test, DUT, except for dense wavelengt
23、h division multiplexing (DWDM) components, when it is inserted into a fibre optic cable. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61300. For dated references, subsequent amend- ments t
24、o, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61300 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the
25、normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60874-14-9, Connectors for optical fibres and cables Part 14-9: Fibre optic connector type SC-APC tuned 8 terminated on single mode fibre type B1 Detail specification IEC
26、 60874-14-10, Connectors for optical fibres and cables Part 14-10: Fibre optic pigtail or patch cord connector type SC-APC untuned 8 terminated on single mode fibre type B1 Detail specification IEC 61300-1, Fibre optic interconnecting devices and passive components Basic test and measurement procedu
27、res Part 1: General and guidance IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation IEC 61300-3-6, Fibre optic interconnecting devices and passive components Basic test and measurement pr
28、ocedures Part 3-6: Examinations and measurements Return loss 1) _ 1) “A consolidated edition 1.2 exists (1999) that includes IEC 61300-3-6 (1997), its amendment 1 (1998) and its amendment 2 (1999). Page 3 EN 6130037:2001 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006,
29、 Uncontrolled Copy, (c) BSI ? BSI 05-2001 3 General description The measurement is made by comparing the incident optical power transmitted through the component with the output optical power and the optical power reflected along the input path over the specified wavelength range. Return loss is the
30、 ratio of the power incident on, or entering the DUT, to the total power reflected by the DUT, expressed in dB. Return loss is a positive number. There are two methods for this measurement. The first method is the optical spectrum analyser or OSA method. This method is the reference method. The othe
31、r method is the optical power meter method. Except for what is indicated below, the measurement procedures for the wavelength dependence of attenuation and return loss are identical to the corresponding procedures detailed in IEC 61300-3-4 and IEC 61300-3-6. The methods for measuring the attenuation
32、 and return loss refer to typical methods described in IEC 61300-3-4 and IEC 61300-3-6. Page 4 EN 6130037:2001 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? BSI 05-2001 4 Apparatus 4.1 Device under test (DUT) The DUT has two optical port
33、s. The ports may be terminated with pigtails or with connectors. Reference plugs with pigtails, and as required, reference adapters, shall be added to those ports with connector terminations so as to form complete connector assemblies with pigtails. 4.2 Reference branching device (RBD) The configura
34、tion of the reference branching device is 1X2 or 2X2. If its configuration is 2X2, one port of the reference branching device shall be terminated to have no reflection. The splitting ratio of the reference branching device shall be stable with wavelength. It shall also be insensitive to polarization
35、. The wavelength dependence of transmission attenuation shall be low enough to allow the minimum wavelength dependence of return loss to be measured. The polarization sensitivity of transmission attenuation shall be less than one-tenth of the wavelength dependency of attenuation to be measured. The
36、directivity should be at least 10 dB higher than the maximum return loss to be measured. 4.3 Optical spectrum analyser (OSA) The optical spectrum analyser measures the output power at every wavelength over the specified wavelength range. The optical spectrum analyser typically consists of a diffract
37、ion grating, an optical detector, the associated electronics and an optical connector. The wavelength resolution can be variable but shall be specified. The polarization sensitivity shall be less than one-tenth of the wavelength dependency of attenuation to be measured. Where, during the sequence of
38、 measurements, an optical spectrum analyser is disconnected and reconnected, the coupling efficiency for the two measurements shall be maintained. 4.4 Broadband source (BBS) The broadband source is a light source which has enough output power in the chosen wavelength band. The broadband source may b
39、e a LED or an amplified spontaneous emission of an optical fibre amplifier. Its output power shall be stable. The wavelength bandwidth shall be wide enough for the wavelength dependency of attenuation and return loss to be measured. The stability of optical output power shall be better than ?0,05 dB
40、 over the measuring period. 4.5 Detector (D) The detector consists of an optical detector, the associated electronics and means for connecting to an optical fibre. The optical connection may be a receptacle for an optical connector, a fibre pigtail or a bare fibre adapter. The detector shall be line
41、ar. Since all of the measurements are differential, however, it is not necessary that the calibration be absolute. Care should be taken to suppress the reflected power from the detector, D, during the measurement. Where, during the sequence of measurements, a detector is disconnected and reconnected
42、, the coupling efficiency for the two measurements shall be maintained. Use of a large area detector to capture all of the light emanating from the fibre is recommended. Page 5 EN 6130037:2001 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 02:24:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
43、? BSI 05-2001 4.6 Variable wavelength source (VWS) The variable wavelength source is a light source which can select a specific output wavelength. The stability at the operating wavelength shall be better than 0,05 dB over the measuring period. The variable wavelength source may consist of a broadba
44、nd source and an adjustable wavelength selective element, e.g. a wavelength tunable filter or fibre Bragg grating or a coherent wavelength-tunable source, etc. The centre wavelength shall be accurate enough to measure the wavelength dependency. The side mode suppression ratio (SMSR) of the variable
45、wavelength source shall be high enough for the wavelength dependency of attenuation and return loss to be measured. The bandwidth of the adjustable wavelength selective element shall be narrow enough for the wavelength dependency of attenuation and return loss to be measured. Care must be taken to s
46、ee that coherent interference effects are avoided. Unless otherwise specified, launch conditions shall be in accordance with annex B of IEC 61300-1. 4.7 Temporary joint (TJ) A temporary joint is a joint that is made to connect the DUT into the measurement circuit. Examples of temporary joints are co
47、nnectors, splices, vacuum chucks or micro manipulators. The loss of the temporary joint shall be stable and the TJ should have a return loss at least 20 dB greater than the maximum return loss to be measured. Where, during the sequence of measurements, a temporary joint is disconnected and reconnect
48、ed, the coupling efficiency for the two measurements shall be maintained. It is necessary to ensure that temporary joints are refractive index matched or fusion spliced so as to minimize reflections between the fibre end faces. 4.8 Angled PC connector (APC) The angled PC connector shall satisfy the
49、requirements of IEC 60874-14-9 or IEC 60874-14-10. 4.9 Terminator (T) Fibre terminations marked T shall have a high return loss. Three types of terminations are suggested: angled fibre ends; the application of an index material to the fibre end; attenuation in the fibre, for example with a mandrel wrap. Where attenuation is used as a termination, it may be applied between components. The fibre termination shall have a return loss at least 20 dB greater than the maximum return loss to b