相位共轭补偿大气传输中SBS的阈值效应对目标上光强分布的影响

Influence of Threshold Effect of Stimulated Brillouin Scattering on Light Intensity Distribution of a Target

提出了在用非线性光学技术补偿激光大气传输过程中，利用受激布里渊散射（ＳＢＳ）的阈值效应可以在非配合目标上主动获得小面积的信标光斑。从理论上证明了在存在大气湍流的情况下，阈值效应对目标上信标光强分布的影响。最后分别就最初目标上的光斑是由两个强反射光点组成的光斑和是一个大面积的强度连续分布的光斑的情况进行了实验研究，实验结果与理论相符合。

We present a method to obtain a beacon light point on an uncooperative target by means of the threshold effect of stimulated Brillouin scattering. The influence of the threshold effect on the light intensity distribution on the target is theoretically demonstrated. The experiment is made in the cases of two speckles on the target and a large area light spot on the target. The experimental result agrees with theory.