雾的激光退偏振现象的实验研究

Experimental Study on the Laser Depolarization of Fog

用超声波雾化法产生了粒径分布在 5～ 5 0 μm范围的水雾。用He Ne相干光 (0 6 3μm)研究了这些极小水滴的后向散射的退偏度。实验证实 ,这些人造云雾的退偏度对重力有一个特别的依赖方向 ;实验还发现在云雾的退偏现象中 ,含有一种电

Fog with the size of 5-50 μm is simulated with an ultrasonic atomizer. A He-Ne laser source at 0.63 μm is used to investigate the degree of the depolarization of the backscattered wave from those tiny water drop. It is shown that the degree of depolarization characters of those man-made fog have a gravity-dependence in a specified direction, and demonstrated an opto-electronic effect in the depolarization of the fog.