JIS C61300-3-20-2009 光纤连接器和无源组件.基础试验和测量过程.第3-20部分:检查和测量.纤维光学分路器件的方向性
Fiber optic interconnecting devices and passive components -- Basic test and measurement procedures -- Part 3-20: Examinations and measurements -- Directivity of fiber optic branching devices