Analysis of the spatial distribution of luminous intensity at the fibre output

摘要

A method based on weakly guiding approximation which allows calculation of luminous intensity in step-index fibre was proposed. The calculation shows that spatial distribution of luminous intensity is rotationally symmetrical and has a discrete character. The quantity and values of emission angles depend on the normalized frequency of a fibre. Values of luminous intensity depend on the position and radiant power distribution of the light source.