光纤多模发射条件第1部分:测量多模衰减的发射条件要求

[中文适用范围]： 本部分IEC 62614描述了用于测量无源组件和已安装电缆设备中多模衰减的发射条件要求。本文档涉及的光纤类型包括A1-OMx类别，其中x = 2、3、4和5（50 µm/125 µm），以及A1-OM1（62.5 µm/125 µm）多模光纤，如IEC 60793-2-10中所规定。详细说明的标称测试波长为850 nm和1300 nm。本文档也适用于其他多模类别和/或其他波长的多模衰减测量，但其他类别和波长的源条件未在此定义。这些要求的目的是： • 确保使用不同类型测试设备时现场测量的一致性； • 确保使用不同类型测试设备时工厂测量的一致性； • 确保现场测量与工厂测量的一致性。 本文档描述了使用具有受控环绕通量（EF）的光源进行光衰减测量的发射条件要求。 [外文原描述]： IEC 62614-1:2020 describes the launch condition requirements used for measuring multimode attenuation in passive components and in installed cable plants. In this document, the fibre types that are addressed include category A1-OMx, where x = 2, 3, 4 and 5 (50 µm/125 µm), and A1-OM1 (62,5 µm/125 µm) multimode fibres, as specified in IEC 60793-2-10. The nominal test wavelengths detailed are 850 nm and 1 300 nm. This document can be suitable for multimode attenuation measurements for other multimode categories and/or other wavelengths, but the source condition for other categories and wavelengths are not defined here. The purpose of these requirements is as follows: - to ensure consistency of field measurements when different types of test equipment are used; - to ensure consistency of factory measurements when different types of test equipment are used; - to ensure consistency of field measurements when compared with factory measurements. This document describes launch condition requirements for optical attenuation using sources with a controlled encircled flux (EF). This first edition cancels and replaces IEC 62614, published in 2010, and constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 62614: a) increase of the value of the uncertainty attenuation variation coefficient Y for 50 µm core fibre at 1 300 nm, due to launch conditions, to twice the previous value; b) changes to 3.4, 5.6, including Table 5, and some references to remain consistent with IEC 61280-4-1:2019; c) changes to multimode fibre references to be consistent with IEC 60793-2-10:2019.