摘要
分析了球壳激光窗口附加相移产生的原因 :窗口本身光路长度不等、窗口材料的热和弹光效应引起的折射率和应变分布不均。用差分法计算了光波阵面附加相移的分布 ,结果表明 ,窗口参数的选择对光束位相分布影响较大。考虑热和弹光效应 ,依据远场光斑中心峰值的大小 ,得到较佳的窗口参数 ,减小了附加相移对光束质量的影响。
WT5”BZ]Analysis of phase difference of spherical laser window is presented, which includes unequality of optical path caused by window itself and disuniformity of refration index and strain caused by thermal and photoelastic effects. The distribution of phase difference is calculated with differential method. It indicates that choice of window parameters influence the distribution of phase serious. The optimal parameters of laser window can be given based on thermal and photoelastic effects according to center intensity of far field beam to minimize the influence on beam quality. [WT5”HZ]
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2000年第6期681-684,共4页
High Power Laser and Particle Beams
基金
国防预研基金资助课题
关键词
球形窗口
附加相移
折射率
应变
spherical window
phase difference
refration index
strain
