液晶闪耀光栅波前相位测量方法  

Wave-Front Measurement Approach of Liquid-Crystal Blazed Gratings

作　　者：郑春艳[1] 杨若夫[1] 徐林[1] 孔令讲[2] 敖明武[1] 杨平[3] 黄子强[1] 吴健[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054 [2]电子科技大学电子工程学院,四川成都610054 [3]中国科学院光电技术研究所自适应光学重点实验室,四川成都610209

出　　处：《中国激光》2011年第10期175-180,共6页Chinese Journal of Lasers

基　　金：国家"十一五"预研项目(H04010201)资助课题

摘　　要：电控液晶光栅在卫星激光通信、激光雷达的光束指向应用中具有体积小、光束灵活可控的优势。而获取电控液晶光栅对光波前的相位调制分布则是评价液晶光栅性能的关键。提出液晶光栅调制波前相位的共轭移相干涉测量技术,通过实验对比验证了实测远场分布与近场相位计算远场分布的一致性,由此可实现由近场相位测量的光束指向控制新方法。Electronically controlled liquid-crystal gratings have advantages such as small volume and agile optical beam steering in satellite laser communication and laser radar.However,the key issue for performance evaluation of liquid-crystal gratings is to obtain the modulated beam wavefront by it.Conjugation phase shifting interferometry measuring liquid-crystal gratings wavefront is presented.In the experiment,the measured far-field intensity is in accordance with the theoretic analysis on near-field wavefront.This technology shows a new beam steering control method with near-field wavefront measurement.

关 键 词：测量 波前相位 共轭移相干涉仪 液晶光栅 

分 类 号：TN247[电子电信—物理电子学]