DANSK DS/EN IEC 60793-2-40 PDF

This part of IEC 60793 is applicable to category A4 optical multimode fibres and the related subcategories A4a, A4b, A4c, A4d, A4e, A4g, A4h and A4i. These fibres have a plastic core and plastic cladding and may have step-index, multi-step index or graded-index profiles. The fibres are used in information transmission equipment and other applications employing similar light transmitting techniques, and in fibre optic cables. Table 1 summarizes some of the salient characteristics and applications of these fibres. Table 1 – Characteristics and applications of category A4 fibres Sub-category Core diameter (µm) Cladding diameter (µm) Numerical aperture Naff e Operating wave-length(s) (nm) Applications A4a A4a.1 A4a.2 a 1 000 0,50 0,53 650b Digital audio A4b a 750 0,50 650 Industrial A4c a 500 0,50 650 Sensor A4d a 1 000 0,30 650 Digital A4e ≥ 500 750 0,25 650 Digital A4f c c c c c A4g 120 490 0,190 650 850 1 300 Data A4h 62,5 245d 0,190 850 1 300 Data A4i 55 490 0,24 850 Industrial interface, automobile, and industrial, sensor and sensor data transmission audio- visual interface and data trans- mission audio- visual interface and data trans- mission trans- mission trans- mission; primarily used in ribbon structures data trans- mission a Typically 15 µm to 35 µm smaller than the cladding diameter. b Other potential wavelengths for A4a fibre are described in Annex K. c This sub-category is outdated and therefore no more specified. d Cladding diameters of 490 µm and 750 µm are also possible. e Naff is numerical aperture measured by far field pattern method. In addition to the applications shown in Table 1, other applications for A4 fibres include, but are not restricted to, the following: support for short reach, high bit-rate systems in telephony, distribution and local networks, carrying data, voice and/or video services and on-premises intrabuilding and interbuilding fibre installations, including local area networks (LANs), private branch exchanges (PBXs), video, various multiplexing uses and miscellaneous related uses, such as consumer electronics and industrial and mobile networks. Three types of requirements apply to A4 fibres: • general requirements, as defined in IEC 60793-2; • specific requirements common to category A4 multimode fibres covered in this document and which are given in Clause 4;• particular requirements applicable to individual fibre sub-categories and implementations or specific applications which are defined in this document, in the normative family specification annexes.