1、 IEC 61300-3-39 Edition 2.0 2011-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-39: Examinations and measurements Physical contact (PC) optical connector reference plug selection for return loss m
2、easurements Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 3-39: Examens et mesures Choix dune fiche de rfrence pour connecteur optique contact physique (PC) pour la mesure de laffaiblissement de rflexion IEC61300-3-39:2011 THIS P
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17、 contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 61300-3-39 Edition 2.0 2011-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-39: Examinations and measurements Physi
18、cal contact (PC) optical connector reference plug selection for return loss measurements Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 3-39: Examens et mesures Choix dune fiche de rfrence pour connecteur optique contact physique
19、(PC) pour la mesure de laffaiblissement de rflexion INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 33.180.20 PRICE CODE CODE PRIX ISBN 978-2-88912-778-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Ele
20、ctrotechnique Internationale 2 61300-3-39 IEC:2011 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 5 3 General description 5 3.1 General . 5 3.2 Definitions . 5 3.2.1 Reference plug 5 3.2.2 Acceptance return loss value RLa6 3.3 Reference plug selection Definition and evaluation of the IRL
21、 for a plug . 6 4 Apparatus . 7 5 Procedure 7 5.1 Reference plug selection . 7 5.2 Measurement of minimum acceptable RL of a plug under test 7 5.3 Accuracy considerations 8 6 Details to be specified 8 Annex A (Informative) Measurement of the return loss of physical contact optical connectors using a
22、 reference plug 9 Bibliography 12 Figure 1 Behaviour of the acceptance limit RLain the return loss measurement as a function of the reference plug return loss RLref used in the test the curves are given for several values of allowed RLmgrades 6 Figure 2 Scheme for plug mating in the procedure for th
23、e intrinsic return loss estimation . 7 Figure 3 . 8 Figure A.1 Scheme of two fibres mated in a connection and the resulting refractive index shape 9 Figure A.2 Scheme of two plugs mated against the ideal plug 10 61300-3-39 IEC:2011 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNE
24、CTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-39: Examinations and measurements Physical contact (PC) optical connector reference plug selection for return loss measurements FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organizatio
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34、tention 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 IEC Publication may be the subject of patent rights.
35、 IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61300-3-39 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. This second edition of IEC 61300-3-3
36、9 cancels and replaces the first edition published in 1997 and constitutes a technical revision. Changes from the previous edition are structure of the standard, general description and the Annex. 4 61300-3-39 IEC:2011 The text of this standard is based on the following documents: FDIS Report on vot
37、ing 86B/3274/FDIS 86B/3306/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The list of all parts of IEC 61300 series, published
38、 under the general title Fibre optic interconnecting 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 stability date indicated on the IEC web site under “http
39、:/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. 61300-3-39 IEC:2011 5 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 3-3
40、9: Examinations and measurements Physical contact (PC) optical connector reference plug selection for return loss measurements 1 Scope The objective of this part of IEC 61300 is to select non-angled physical contact (PC) optical connector plugs for use as the reference plug in the return loss RL mea
41、surement and to define an acceptance return loss value RLafor use in plug acceptance testing. This procedure is for use to guarantee a certain return loss value RL when two plugs have been successfully tested against the reference connector when randomly mated. 2 Normative references The following r
42、eferenced documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61300-3-6. Fibre optic interconnecting devices and passive compo
43、nents Basic test and measurement procedures Part 3-6: Examinations and measurements Return loss 3 General description 3.1 General Return loss at mating points of mated non-angled PC optical connectors occurs due to multiple reflections at thin damaged layers on the fibre surface due to the polishing
44、 process. The refractive index of the damaged layers is higher than that of the silica fibre. Due to this consideration, it is possible to derive a simple law for predicting the return loss of a connection formed by mating two plugs, and to define a parameter that characterizes the reflectance behav
45、iour of each single plug. When testing a plug against a reference one, the measured return loss depends on the characteristics of the reference plug used. In order to guarantee that two randomly mated plugs give a return loss greater than a minimum acceptable value RLm, the following steps are neces
46、sary: select the reference plug with well-defined characteristics; set a lower limit, RLa, for the return loss of each plug measured against the reference plug. 3.2 Definitions 3.2.1 Reference plug A reference plug is defined as any plug in a group of plugs (minimum three) that, mated together in ea
47、ch possible combination, give results with a specified value of return loss RLref(see 5.1 for an operative method of reference plug selection). The value for RLrefand the 6 61300-3-39 IEC:2011 relevant tolerance range shall be indicated in the detail specification. However, this value has to be in t
48、he value range of the connectors that are measured with this reference. 3.2.2 Acceptance return loss value RLaTo ensure that any randomly mated plugs give a return loss greater than the allowed RLm, it is necessary to find the limit of the minimum acceptable return loss value RLafor the connector se
49、t (two plugs mated by an adapter) composed of the reference plug and the plug under test. This value is related to the RLrefof the reference plug and to RLmby the following equation: ( )110log 20 6 RL RL)/20RL (RL+=mrefmadB (1) Figure 1 shows the behaviour of RLaas a function of RLref for several RLmvalues. For example, if 35 dB is allowed in random mated connect
