PDF Standards IEC 61300-3-53 Ed. 1.0 b:2015
Fibre optic interconnecting devices and passive components – Basic test and measurement procedures – Part 3-53: Examinations and measurements – Encircled angular flux (EAF) measurement method based on two-dimensional far field data from step index multimode waveguide (including fibre)
standard by International Electrotechnical Commission, 02/05/2015