基于液晶偏振光栅的大口径激光光束扫描系统  

Large-aperture laser beam scanning system based on liquid crystal polarization grating

作　　者：刘禹彤 曹宗新 李子凡 龚君豪 毛红敏[1] 张大伟[2] 赵元安[3] 洪瑞金[2] 樊丽娜 曹召良 LIU Yutong;CAO Zongxin;LI Zifan;GONG Junhao;MAO Hongmin;ZHANG Dawei;ZHAO Yuanan;HONG Ruijin;FAN Lina;CAO Zhaoliang(Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China;School of Optical-Electronical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Laboratory of Thin Film Optics,Shanghai Institute of Optics and Fine Mechanics,Shanghai 201800,China)

机构地区：[1]苏州科技大学物理科学与技术学院江苏微纳热流技术与能源应用重点实验室,江苏苏州215009 [2]上海理工大学光电信息与计算机工程学院,上海200093 [3]中国科学院上海光学精密机械研究所薄膜光学实验室,上海201800

出　　处：《应用光学》2024年第3期557-567,共11页Journal of Applied Optics

基　　金：“十四五”江苏省重点学科资助(2021135);吉林省科技厅重点研发项目(20220203033SF)。

摘　　要：非机械式激光光束扫描系统具有体积小、重量轻、易集成等优势,在激光雷达、激光武器和激光通信等领域具有较大的应用前景,其通光口径决定着设备的工作距离、扫描精度和目标摧毁能力。基于液晶偏振光栅设计了一种全电控制的大口径激光光束扫描系统。采用液晶偏振光栅和液晶空间光调制器的协同工作方式,实现光束的大角度连续扫描;设计了光束扫描系统,并重点分析了级联液晶偏振光栅组的控制策略,给出了具体控制方法。最后,进行了激光光束的初步扫描实验,实现了70 mm口径光束在−16.575°~16.575°的偏转。该研究结果为激光光束的非机械式扫描控制提供了技术支撑,并在大口径激光扫描系统应用方面进行了初步探索。The non-mechanical laser beam scanning system has advantages such as small size,light weight,and easy integration,and has great application prospects in fields such as LIDAR,laser weapons,and laser communication.Its aperture determines the working distance,scanning accuracy,and target destruction ability of the equipment.A fully electrically controlled large aperture laser beam scanning system based on a liquid crystal polarization grating was designed.Based on a liquid crystal polarization grating assosiated with a liquid crystal spatial light modulator,the large-angle continuous scanning of the beam was achieved.A beam scanning system and focused on analyzing the control strategy of cascaded liquid crystal polarization grating groups was designed,providing specific control methods.Finally,a preliminary scanning experiment of the laser beam was conducted,achieving a deflection of the 70 mm aperture beam at−16.575°~16.575°.The research results provide technical support for the non-mechanical scanning control of laser beams,and make preliminary exploration in the application of large-aperture laser scanning systems.

关 键 词：激光 液晶偏振光栅 非机械式扫描 大口径 级联控制 

分 类 号：TN249[电子电信—物理电子学]