Laser beam expanding technology based on liquid crystal spatial light modulator

Ying-kui LI; Ji QI; Jie ZHANG; Xiao-long NI; Zhi LIU; Yang YANG

doi:10.3788/YJYXS20183309.0764

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Laser beam expanding technology based on liquid crystal spatial light modulator

Material and Device | 更新时间：2020-07-06

- Laser beam expanding technology based on liquid crystal spatial light modulator
- Chinese Journal of Liquid Crystals and Displays Vol. 33, Issue 9, Pages: 764-771(2018)
- 作者机构：
  
  1.中国航空工业集团公司洛阳电光设备研究所, 河南洛阳 471023
  2.长春理工大学空间光电技术研究所, 吉林长春 130022
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20183309.0764
  CLC： TN212
- Received：08 June 2018，
  
  Accepted：19 July 2018，
  
  Published：05 September 2018
- 稿件说明：
移动端阅览
Ying-kui LI, Ji QI, Jie ZHANG, et al. Laser beam expanding technology based on liquid crystal spatial light modulator[J]. Chinese journal of liquid crystals and displays, 2018, 33(9): 764-771.
DOI：

Ying-kui LI, Ji QI, Jie ZHANG, et al. Laser beam expanding technology based on liquid crystal spatial light modulator[J]. Chinese journal of liquid crystals and displays, 2018, 33(9): 764-771. DOI： 10.3788/YJYXS20183309.0764.

摘要

由于激光器发出的光束通常在毫米量级，然而在激光测距、激光通信、激光全息等领域中需要较宽的光束，因此需要对激光束进行准直扩束。本文提供了一种基于LC-SLM的变倍率激光扩束方法，利用LC-SLM产生透镜的波阵面。由计算机数值模拟出焦距不同的变焦透镜相位调制图，将其加载到LC-SLM上，利用焦距不同的变焦透镜相位调制图的灰度信号来控制LC-SLM外加电压变化，实现了基于LC-SLM的变焦透镜功能。根据伽利略望远镜形式的扩束系统，本文利用LC-SLM的变焦透镜功能与匹配透镜配合，搭建了基于LC-SLM的变倍率激光扩束系统，实现对激光束的变倍扩束。实验结果表明，该系统实现了2

~10

连续变倍率激光扩束。系统结构简单、精度高、响应速度快，具有很大的实用价值。

Abstract

It needs a wider beam in laser ranging

laser communication

laser holography and so on

but the laser beam is in the millimeter scale

therefore

collimating and expanding the beam of the laser beam is needed. This article provides a variable-rate laser beam expanding method based on LC-SLM. Using LC-SLM to produce the wavefront of a lens

The phase modulation graph of the zoom lens with different focal length is simulated by the computer. It is loaded on the LC-SLM

and the change of the LC-SLM applied voltage is controlled by the gray signal of the phase modulation graph of the zoom lens with different focal length. The function of the zoom lens based on the LC-SLM is realized. According to the beam expansion system of Galileo telescope

in this paper

a variable rate laser beam expansion system based on LC-SLM is built by using the function of the zoom lens of LC-SLM and the matched lens to achieve the multiplex beam expansion of the laser beam. Experimental results show that the system realizes continuous variable rate laser beam expanding at 2

~10

. The system has simple structure

high accuracy and fast response speed

and has great practical value. It is of great practical value.

关键词

Keywords

references

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Related Institution

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State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University

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