标准摘要
[中文适用范围]： IEC 61300 这部分的目的是测量多端口非波长选择性 MxN 光纤分支设备通道之间光的方向性。方向性定义为从一个输入路径到另一个输入光路的光的比例，通常与前一个输入光路隔离。 [外文原描述]： Applies to measuring the directivity of light between channels of a multiport non-wavelength-selective MxN fibre optic branching device. The directivity is the fraction of light that goes from one input path to another path, normally isolated from each other.
英文名称Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-20: Examinations and measurements - Directivity of fibre optic branching devices