大气瞬态受激喇曼散射阈值的研究  

Threshold of Transient Stimulated Raman Scattering of Atmosphere

作　　者：刘炎焱[1] 王俊波[1] 乐时晓[1] 

机构地区：[1]成都电子科技大学应用物理所

出　　处：《电子科技大学学报》1995年第4期422-425,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家高技术计划激光技术领域资助

摘　　要：从理论上研究了强激光脉冲及其序列通过分层均匀大气的瞬态受激喇曼散射ＴＳＲＳ效应，计算了大气中不同脉冲结构参数的强激光传输产生ＴＳＲＳ的阈值光强。计算表明，由于大气多数的非均匀性，只有当脉冲重复频率大于１０倍（远大于用均匀大气模型的结论）海平面大气的横向弛豫时间时，可忽略大气的记忆效应，用单脉冲的ＴＳＲＳ理论代替脉冲序列计不阈值光强。This Paper studies the transient stimulated Raman scattering(SRS)producted by a pulsetrain or an individual pulse of high power laser propagation through atmopshere.The threshold intensity of the train of high power laser or a individual pulse,producting the SRS through uniform atmosphere,iscalculated with different parameters of the train or pulse.the results show that the parameters of the pulsetrain laser affect the threshold intensity.The longer the repetition time of pulse is ,or the shorter the pulse width is,the higher the threshold is.in the up-link propagation,the effects can be neglected when the pulse-repetitional-frequence is lower than 6 MHz.

关 键 词：瞬态 阈值 受激喇曼散射 脉冲序列 

分 类 号：O437.3[机械工程—光学工程]