BS EN 61300-3-53-2015 光纤互连器件和无源元件. 基本试验和测量程序. 检查和测量. 基于阶跃折射率多模波导二维远场数据的周围角通量 (EAF) 测量方法 (包括纤维)
Fibre optic interconnecting devices and passive components. Basic test and measurement procedures. Examinations and measurements. Encircled angular flux (EAF) measurement method based on two-dimensional far field data from step index multimode waveguide (