Polarization-independent two-dimensional beam steering using liquid crystal optical phased arrays  

作　　者：Liang Wu Xiangru Wang Caidong Xiong Ziqiang Huang Rusheng Zhuo Jiarui Rao Qinggui Tan 吴亮;汪相如;熊彩东;黄子强;卓儒盛;饶家睿;谭庆贵(School of Physical Electronics,University of Electronic Science and Technology of China;School of Optoelectronic Information,University of Electronic Science and Technology of China;Research Institute of Electronic Science and Technology,University of Electronic Science and Technology of China;National Key Laboratory of Science and Technology on Space Microwave)

机构地区：[1]School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China [2]School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China [3]Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China Chengdu 610054, China [4]National Key Laboratory of Science and Technology on Space Microwave, Xi＇an 710100, China

出　　处：《Chinese Optics Letters》2017年第10期81-84,共4页中国光学快报（英文版）

基　　金：supported by the National Science Foundation of China(NSFC)(Nos.61405029,91438108,and61231012);the Shanghai Aerospace Science and Technology(SAST)(No.2015087)

摘　　要：A polarization-independent nonmechanical laser beam steering scheme is proposed to realize continuous two-dimensional（2 D） scanning with high efficiency, where the core components are two polarization-dependent devices, which are called liquid crystal optical phased arrays（LC-OPAs）. These two one-dimensional（1D） devices are orthogonally cascaded to work on the state of azimuthal and elevation steering, respectively. Properties of polarization independence as well as 2D beam steering are mathematically and experimentally verified with a good agreement. Based on the experimental setup, linearly polarized beams with different polarization angles are steered with high accuracy. The measured angular deviations are less than 5 μrad, which is on the same order of the accuracy of the measurement system. This polarization-independent 2 D laser beam steering scheme has potential application for nonmechanical laser communication, lidar, and other LC-based systems.A polarization-independent nonmechanical laser beam steering scheme is proposed to realize continuous two-dimensional（2 D） scanning with high efficiency, where the core components are two polarization-dependent devices, which are called liquid crystal optical phased arrays（LC-OPAs）. These two one-dimensional（1D） devices are orthogonally cascaded to work on the state of azimuthal and elevation steering, respectively. Properties of polarization independence as well as 2D beam steering are mathematically and experimentally verified with a good agreement. Based on the experimental setup, linearly polarized beams with different polarization angles are steered with high accuracy. The measured angular deviations are less than 5 μrad, which is on the same order of the accuracy of the measurement system. This polarization-independent 2 D laser beam steering scheme has potential application for nonmechanical laser communication, lidar, and other LC-based systems.

关 键 词：LC Polarization-independent two-dimensional beam steering using liquid crystal optical phased arrays OPA HWP 

分 类 号：O436.3[机械工程—光学工程]