Fundamental algorithm and computational codes for the light beam propagation in high power laser system

摘要

The fundamental algorithm of light beam propagation in high power laser system is investi- gated and the corresponding computational codes are given. It is shown that the number of modulation ring due to the diffraction is related to the size of the pinhole in spatial filter (in terms of the times of diffraction limitation, i. e. TDL) and the Fresnel number of the laser system; for the complex laser sys- tem with multi-spatial filters and free space, the system can be investigated by the reciprocal rule of op- erators.