摘要
本文对激光束穿过参数变化的紊流剪切层引起的光束退化进行了系统的实验研究,发现紊流剪切层的扩展率随马赫数的增大而迅速减小,但密度比对扩展率只有较小的影响。用电子照相系统作远场测量,发现Strehl比随剪切层两侧折射率差的增加而减小,随光束直径的加大而减小,随下游距离的增加而减小。
The dogradation of laser beam through turbulent shearing layers has been experimentally studied with a variety of parameters. The near field measurement results showed that the growth rates of shearing layers decreased dramaticlly with increasing Mach number and were only weakly dopondont on the density ratio. The optical far field measurement results showed that Strehl ratio decreased with increasing refractive index change across the shearing layers, with increasing growth rate, with increasing distance downstream of the nozzle exit and with incresing beam diameter.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1990年第4期198-204,共7页
Chinese Journal of Lasers
