利用LCD相位调制获得高效率空心光束  

Gaining of hollow beam with high efficiency by LCD's phase modulation

作　　者：范君柳[1] 冯秀舟[1] 方建兴[1] 

机构地区：[1]苏州大学物理科学与技术学院,苏州215006

出　　处：《激光杂志》2007年第2期31-32,共2页Laser Journal

摘　　要：空心光束由于具有一系列特殊物理性质,所以它在对微观粒子的三维操控技术中占据了极其重要的地位。本文提出采用LCD对入射激光进行相位调制得到高衍射效率空心光束的方法。文章研究了螺旋波的特性,分析了LCD相位调制的原理,在LCD上作出螺旋波的实时纯相位图对入射光进行相位调制,获得具有高衍射效率的空心光束。实验结果表明,采用LCD相位调制方法产生空心光束不但具有实时可调,方便、精确的优点,还具备高衍射效率。A method of how to get hollow beams with high diffraction efficiency by LCD phase modulation is reported in this paper. The characteristic of spiral beam and the principle of LCD phase modulation are discussed, and the incident light was modulated by using the pure phase diagram of spiral beam presented by LCD. The results show that hollow beam with high efficiency can be obtained easily and exactly by using the way we explained. The generation of hollow beam is real - time and adjustable.

关 键 词：螺旋波 LCD相位调制 空心光束 

分 类 号：O439[机械工程—光学工程] O436.1[理学—光学]