Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-20: Examinations and measurements - Directivity of fibre optic branching devices
光纤互连器件和无源元件.基本试验和测量程序.第3-20部分:检查和测量.光纤分支器件的方向性
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.