摘要
对非均匀近场强度分布影响强激光远场聚焦效果的原因进行了分析。对高能激光窗口进行了二元光学设计。提高了光束强度分布的均匀性,改善了光束质量。介绍了二元光学设计的基本原理,采用随机并行扰动爬山法对窗口的位相分布、变换后的光束强度分布、衍射效率和光束均匀性进行了计算。计算结果表明,基于二元光学设计的激光窗口能有效地改善光束强度分布的均匀性,提高了发射光束的质量。
It is analysed that non-uniform near-field intensity distribution of high power laser influences far-field focusing effects.In order to improving intensity uniformity and beam quality,the method of high power laser window designed with binary optics is mentioned.The basis theory of binary optics design is introduced.The phase distribution of laser window,intensity distribution,diffraction efficiency and uniformity of beam are calculated with the method of stochastic parallel disturb climbing hill.The result indicates that laser window based on binary optical design can improve intensity uniformity and beam quality.
出处
《光学技术》
CAS
CSCD
北大核心
2007年第S1期227-228,231,共3页
Optical Technique
关键词
二元光学
高能激光窗口
随机并行扰动爬山法
衍射效率
光束均匀性
光束质量
binary optics
high power laser window
stochastic parallel disturb climbing hill
diffraction efficiency
beam uniformity
beam quality
