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偏振相移与相位共轭结合的散射光聚焦技术研究

Focusing of scattering light by combining polarization phase shifting and digital optical phase conjugation

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摘要

散射介质对光的随机散射作用是制约其光学聚焦和成像的重要因素, 光学相位共轭技术能够通过对散射光场共轭还原实现透过散射介质的光学聚焦和成像, 其中散射光场相位的获取是共轭还原的核心。阐述了偏振相移的基本原理, 将偏振相移与相位共轭技术相结合, 设计了新的基于偏振相移的数字光学相位共轭系统。采用633 nm的HeNe激光器作为系统光源, 毛玻璃作为散射介质开展散射光聚焦实验研究。实验结果表明: 该装置能够成功实现透过散射介质的光学聚焦, 其中聚焦点与背景光强的比值可达约400倍。

Abstract

The random scattering effect of scattering medium on light is an important factor that restricts its optical focusing and imaging. The optical phase conjugation technique can realize optical focusing and imaging through the scattering medium by conjugate reduction of scattered light field, where the acquisition of scattered light field phase is the core of conjugate reduction. We expounded the basic principle of polarization phase shift, combined the polarization phase shift with the phase conjugation technique, and designed a novel digital optical phase conjugation system based on polarization phase shift. A 633 nm HeNe laser was used as the system light source, and frosted glass was used as the scattering medium to conduct scattered light focusing experiments.The experimental results show that the device can successfully achieve optical focusing through the scattering medium, and the ratio of the focal point to the background light intensity can reach about 400 times.

Newport宣传-MKS新实验室计划
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中图分类号:O436.1

DOI:10.5768/jao201940.0101011

所属栏目:光电系统与工程

基金项目:国家重点研发计划(2016YFC1401203); 国家自然科学基金青年科学基金(61505140); 天津市自然科学基金(18JCYBJC17100)

收稿日期:2018-09-17

修改稿日期:2018-11-01

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作者单位    点击查看

张 凯:天津大学 海洋科学与技术学院, 天津 300072
薛 彬:天津大学 海洋科学与技术学院, 天津 300072
王志洋:天津大学 海洋科学与技术学院, 天津 300072
吴翰钟:天津大学 海洋科学与技术学院, 天津 300072

联系人作者:张凯(txzhangkai@tju.edu.cn)

备注:张凯(1993-), 男, 硕士研究生, 主要从事光学成像方面的研究。

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引用该论文

ZHANG Kai,XUE Bin,WANG Zhiyang,WU Hanzhong. Focusing of scattering light by combining polarization phase shifting and digital optical phase conjugation[J]. Journal of Applied Optics, 2019, 40(1): 63-67

张 凯,薛 彬,王志洋,吴翰钟. 偏振相移与相位共轭结合的散射光聚焦技术研究[J]. 应用光学, 2019, 40(1): 63-67

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