标准摘要
[中文适用范围]： 本部分 IEC 60793 适用于 A4 类多模光纤及其相关子类别 A4a、A4b、A4c、A4d、A4e、A4g、A4h 和 A4i。这些光纤具有塑料芯和塑料包层，可能具有阶跃折射率、多阶跃折射率或渐变折射率剖面。这些光纤用于信息传输设备和其他采用类似光传输技术的应用，以及光纤电缆中。表1总结了这些光纤的一些显著特性和应用。 [外文原描述]： IEC 60793-2-40:2021 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. 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.
英文名称Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres