反射式液晶空间光调制器电控光束偏转

Zhao Xiangjie; Zhang Dayong; Luo Yongquan

doi:10.3788/HPLPB20122406.1324

Volume 24 Issue 06

May 2012

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Article Navigation > High Power Laser and Particle Beams > 2012 > 24(06): 1324-1328

Su Jian, Zeng Zhi, Liu Yue, et al. Monte Carlo simulation of muon radiation environment in China Jinping Underground Laboratory[J]. High Power Laser and Particle Beams, 2012, 24: 3015-3018. doi: 10.3788/HPLPB20122412.3015

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Zhao Xiangjie, Zhang Dayong, Luo Yongquan. 反射式液晶空间光调制器电控光束偏转[J]. High Power Laser and Particle Beams, 2012, 24: 1324-1328. doi: 10.3788/HPLPB20122406.1324

Citation:

Zhao Xiangjie, Zhang Dayong, Luo Yongquan. 反射式液晶空间光调制器电控光束偏转[J]. High Power Laser and Particle Beams, 2012, 24: 1324-1328. doi: 10.3788/HPLPB20122406.1324

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反射式液晶空间光调制器电控光束偏转

doi: 10.3788/HPLPB20122406.1324

1.
Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China

Received Date: 2011-06-20
Rev Recd Date: 2012-03-06
Publish Date: 2012-06-15

Abstract

Abstract

为获得较大的光束电控偏转范围，使用空间分辨力高达8 m的反射式液晶空间光调制器实现了对入射632 nm激光的电控偏转。利用双光束共焦干涉方法测量了液晶空间光调制器的电控相位延迟特性，最大相移量可达3。根据二元光学理论和器件的电控相位延迟特性，设计了周期台阶相位模式和相应的加载灰度图，以最大衍射效率实现对入射光束的闪耀电控偏转。结果表明：相位模式台阶数为8时，可以实现10 mrad的光束偏转，闪耀级次衍射效率可达46%。利用二元光学的衍射模型对影响衍射效率的关键因素进行了分析，认为器件较低的填充因子和周期台阶模式相位重置点诱导的指向矢回程区是限制光束衍射效率的主要因素。
- binary optics,
- spatial light modulator,
- interference pattern,
- laser beam deflection,
- diffraction efficiency

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