利用受激布里渊散射效应补偿激光大气传输过程中的畸变

Laser Propagation in Atmosphere with Stimulated Brillouin Scattering

提出了利用受激布里渊散射的阈值效应主动在非配合、扩展目标上实现小面积信标的方法 ,在不同的大气扰动条件 (C2n=10 - 1 6～ 10 - 1 2 )下 ,对激光的远距离 (10km)补偿传输过程进行了模拟计算 ,获得了到达目标上的相位共轭光的光强分布。分别在不同的实验环境进行了激光补偿传输实验 ,其中激光补偿传输距离最远达到 2 5 0m。实验结果证实了利用受激布里渊散射实现激光大气传输补偿的有效性 ,证明利用阈值效应在目标上主动获得小面积信标的方法是可行的。

The method to realize a beacon of small area on an uncooperative and extended target by using stimulated Brillouin scattering (SBS) threshold effect is presented. The process of laser propagation through 10 km atmospheric path with SBS is simulated in cases of different atmospheric turbulence (C2n=10-16-10-12). The distribution of the phase-conjugate-light on the target was obtained from the simulation. The experiments of laser propagation with SBS are made in cases of different environments. The maximum distance is 250 m. The results indicate that the laser propagation with SBS effect and the method to realize the beacon of small area on the target are feasible.