IEC 60793-2-40:2015 is applicable to category A4 optical multimode fibres and the related sub-categories A4a, A4b, A4c, A4d, A4e, A4f, A4g and A4h. 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 finally in fibre optic cables. Table 1 of this document summarizes some of the salient characteristics and applications of these fibres. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:- harmonization of terminology within the IEC 60793-2 series;- added measurement parameters for numerical aperture and fibre geometry. Keywords: category A4 optical multimode fibres, information transmission equipment
IEC 60793-2-40:2009 is applicable to optical fibre categories A4a, A4b, A4c, A4d, A4e, A4f, A4g and A4h. These fibres have a plastic core and plastic cladding and may have step-index, multi-step index, or graded-index profiles. This third edition cancels and replaces the second edition published in 2006 and constitutes a technical revision which defines an enhanced A4a fibre named A4a.2 while the existing A4a fibre has been renamed A4a.1.
IEC 60793-2-40:2021 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. This fifth edition cancels and replaces the fourth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - revision of NA range of A4a.2; - addition of a new subcategory A4i; - deletion of the subcategory A4f and of Annex F.
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