强激光与粒子束, 2005, 17 (6): 849, 网络出版: 2006-04-28
反射式液晶光阀用于激光束空间整形可行性研究
Feasibility study of liquid crystal light valve on beam-shaping
反射式液晶光阀 空间整形 振幅调制 位相调制 Liquid crystal light valve Beam-shaping amplitude modulation Phase modulation Spatial transmission
摘要
从理论和实验两方面对一种反射式液晶光阀(LCOS)的调制特性进行了研究.着重研究了在高功率激光系统中,反射式液晶光阀作为空间整形器件面临的一些应用问题,特别是它的各种调制特性、整形能力以及对于光束质量的影响.研究发现,与透射式液晶光阀相比,反射式液晶光阀有着明显的优势,效率达到42%,远远优于透射式液晶光阀10%的效率,从而能够实现系统的大幅度简化,是一种非常有潜力的空间光调制器件.
Abstract
A novel method of beam shaping by liquid crystal light valve (LCOS) is introduced in this paper. The incident phase modulation and spatial transmission properties of a shaped beam are studied, as well as the modulation characteristics of the liquid crystal light valve. There is no any additional phase modulation on the shaped beam when a LCOS is used as the beam shaper. A Garssian beam has successfully been converted to a square flattop super-Gaussian beam by use of a LCOS. The results show that the LCOS of a liquid crystal projector working as a programmable spatial light amplitude modulation is feasible. An officiency of 42% can be achieved.
丁磊, 赵润昌, 李明中, 隋展, 贾伟, 唐晓东. 反射式液晶光阀用于激光束空间整形可行性研究[J]. 强激光与粒子束, 2005, 17(6): 849. DING Lei, ZHAO Run-chang, LI Ming-zhong, SUI Zhan, JIA Wei, TANG Xiao-dong. Feasibility study of liquid crystal light valve on beam-shaping[J]. High Power Laser and Particle Beams, 2005, 17(6): 849.