高功率激光系统鬼光束光控制技术研究

通过理论计算与实验研究,详细分析了鬼光束(ghost beam)的传输与变换规律.研究了高功率激光系统中鬼光束聚焦形成的鬼点(ghost image)的位置与规避方法,在某高功率激光装置预放大系统中通过角度倾斜与透镜迎光面的选择等措施,成功避开了鬼点对各种光学元件带来的损伤,同时融合了笔形光束与反激光的控制技术,提高了系统输出信噪比,获得了稳定可靠的系统输出特性.

Research of the Techniques of Suppressing the Ghost Beam in High Power Solid State Laser System

The propagation and translation of the ghost beam in the high power laser system were analyzed in detail by theoretical calculation and experiments.The position of ghost image and the mitigating measures were studied in the preamplifier system of high power laser facility.A number of mitigating measures,which included tilting of lenses and choosing the meeting-surface of lenses,were implemented to avoid the risks of optic damage from the ghost image.And with the technology of suppressing the pencil-beam and back laser,the steady and reliable output with the improved SNR was gotten.