摘要
The fundamental algorithm of light beam propagation in high powerlaser system is investigated 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 system with multi-spatial filters and free space, the system can be investigated by the reciprocal rule of operators.
基金
This work was partially supported bythe National Natural Science Foundation of China (Grant No. 69789801)
the Natural Science Foundation of Guangdong Province (Grant No. 970842)
National Hi-Tech Committee.
