IEC 62496-2-1-2011 Optical circuit boards - Part 2-1 Measurements - Optical attenuation and isolation《光学电路板.第2-1部分 测量.光纤衰减和隔离》.pdf

1、 IEC 62496-2-1 Edition 1.0 2011-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical circuit boards Part 2-1: Measurements Optical attenuation and isolation Cartes circuits optiques Partie 2-1: Mesures Affaiblissement et isolation optiques IEC 62496-2-1:2011 THIS PUBLICATION IS COPYRIGHT PROTECTED

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16、 Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62496-2-1 Edition 1.0 2011-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical circuit boards Part 2-1: Measurements Optical attenuation and isolation Cartes circuits optiques Partie 2-1: Mesures Affaiblissement et isolation optiques INTERNATIONAL

17、ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE V ICS 33.180.01 PRICE CODE CODE PRIX ISBN 978-2-88912-572-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 62496-2-1 IEC:2011 CONTENTS FOREWOR

18、D . 4 1 Scope . 6 2 Normative references . 6 3 Precautions 6 4 Apparatus . 7 4.1 Launch conditions and source (S) . 7 4.2 Power-meter (D) 7 4.3 Optical fibre (OF) 8 4.4 Mode filter (MF) . 8 4.5 Optical direction changing device (OD) 9 4.6 Temporary joint (TJ) 9 5 Procedure 10 5.1 Pre-conditioning 10

19、 5.2 Visual inspection . 11 5.3 Connectivity inspection 11 5.4 OCB configurations and measurement methods 11 5.5 Attenuation measurement with a power-meter . 13 5.5.1 General . 13 5.5.2 Cut-back method . 13 5.5.3 Insertion method (A) 15 5.5.4 Insertion method (B) 23 5.6 Isolation measurement with a

20、power-meter 25 5.6.1 Insertion method (C) 26 5.6.2 Insertion method (D) 31 5.7 Mirror loss measurement . 32 6 Details to be specified 33 Bibliography 34 Figure 1 Launch apparatus for butt-joint connection, (a) without OD, (b) with OD 10 Figure 2 Cut-back method Configuration A 14 Figure 3 Cut-back m

21、ethod Configuration B 15 Figure 4 Insertion method (A) Configuration A 16 Figure 5 Insertion method (A), multi port sequential measurements Configuration A 17 Figure 6 Insertion method (A) Configuration B 18 Figure 7 Insertion method (A) Configuration C-1 . 19 Figure 8 Insertion method (A) Configura

22、tion C-2 . 20 Figure 9 Insertion method (A) Configuration D 21 Figure 10 Insertion method (A) Configuration E . 22 Figure 11 Insertion method (A) Configuration E . 23 Figure 12 Insertion method (B) Configuration A . 24 Figure 13 Insertion method (B) Configuration C-1 . 25 Figure 14 Insertion method

23、(C) Configuration A 26 Figure 15 Insertion method (C) Configuration B 27 Figure 16 Insertion method (C) Configuration C-1 . 28 62496-2-1 IEC:2011 3 Figure 17 Insertion method (C) Configuration D 29 Figure 18 Insertion method (C) Configuration E 30 Figure 19 Insertion method (C) Configuration E 31 Fi

24、gure 20 Insertion method (D) Configuration A 32 Figure 21 Mirror loss measurement 33 Table 1 Preferred source and launch conditions . 7 Table 2 Preferred launching and receiving fibres . 8 Table 3 Measurement methods of attenuations 11 Table 4 Measurement methods of isolations 12 4 62496-2-1 IEC:201

25、1 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL CIRCUIT BOARDS Part 2-1: Measurements Optical attenuation and isolation FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC Natio

26、nal Committees). 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, Public

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35、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. IEC shall not be held responsible for identifying any or all such patent rights. I

36、nternational Standard IEC 62496-2-1 has been prepared by IEC technical committee 86: Fibre optics. The text of this standard is based on the following documents: FDIS Report on voting 86/396/FDIS 86/401/RVD Full information on the voting for the approval of this standard can be found in the report o

37、n 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 of the IEC 62496 series, published under the general title Optical circuit boards can be found on the IEC website. 62496-2-1 IEC:2011 5 The committee has de

38、cided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site 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 amen

39、ded. 6 62496-2-1 IEC:2011 OPTICAL CIRCUIT BOARDS Part 2-1: Measurements Optical attenuation and isolation 1 Scope IEC 62496-2-1 describes the various methods to measure the optical attenuation and isolation of optical circuit boards (OCBs). 2 Normative references The following referenced documents a

40、re indispensable 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 60793-2-10, Optical fibres - Part 2-10: Product specifications - Sectional specif

41、ication for category A1 multimode fibres IEC 60793-2-50, Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres IEC 60825-1, Safety of laser products Part 1: Equipment classification and requirements IEC 61300-1, Fibre optic interconnecting device

42、s and passive components Basic test and measurement procedures Part 1: General and guidance IEC 61300-3-1:2003, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations and measurements Visual examination IEC 61300-3-4, Fibre optic inter

43、connecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation IEC 62496-1:2008, Optical circuit boards Part 1: General IEC 62614, Fibre optics Launch condition requirements for measuring multimode attenuation ISO 3599, Vernier cal

44、lipers reading to 0,1 and 0,05 mm ISO 6906, Vernier callipers reading to 0,02 mm 3 Precautions The requirements of IEC 60825-1 and the following test requirements shall be met. The position of the fibres in the test should be fixed during the measurement to avoid changes in attenuation caused by ben

45、ding loss. 62496-2-1 IEC:2011 7 4 Apparatus 4.1 Launch conditions and source (S) For multimode measurements, a restricted launch, not an overfilled launch, shall be used. Encircled flux, which is given in IEC 62614, shall be available for the purposes of launching fibre qualification in case of a 50

46、 or 62,5 graded index launch fibre. The required launch conditions can be achieved by including appropriate equipment inside the light source, or by applying mode filters on or in series with the launch cord. For single-mode measurements, the launch condition shall be in accordance with Annex B of I

47、EC 61300-1. The source unit consists of an optical emitter, the associated drive electronics and fibre pigtail. Preferred source and launch conditions are given in Table 1. Table 1 Preferred source and launch conditions No. Type Centre wavelength nm Spectral width nm Stability at 23 o C dB/h Output

48、power Launch conditions Source type S1 Multimode 660 30 30 0,05 aTBD Laser diode or LED S2 Multimode 780 30 30 0,05 aTBD Laser diode or LED S3 Multimode 850 30 30 0,05 aIEC 62614 Laser diode or LED S4 Multimode 980 30 30 0,05 aTBD Laser diode or LED S5 Multimode 1 300 30 30 0,05 aIEC 62614 Laser diode or LED S6 Single-mode 1 310 30 10 0,05 aIEC 61300-1, Annex B.2.2 Laser diode or LED S7 Single-mode 1 550 30 10 0,05 aIEC 61300-1, Annex B.2.2 Laser diode or LED a The source output power shall be 20 dB above the minimum measured power level. NOTE 1 Due to their long coheren