基于外差干涉的涡旋光水下传输相位测量

罗鑫; 陈强珅; 袁晨源; 朱启华; 张航; 冯国英

doi:10.11884/HPLPB202436.240027

基于外差干涉的涡旋光水下传输相位测量

doi: 10.11884/HPLPB202436.240027

1.
四川大学电子信息学院激光微纳工程研究所，成都 610065
2.
中国工程物理研究院激光聚变研究中心，四川绵阳 621900
3.
成都理工大学，成都 610059

基金项目: 国家重点研发计划项目(2022YFB3606304)；国家自然科学基金项目(U2230129)

详细信息

作者简介:
罗　鑫，2021222050028@stu.scu.edu.cn

通讯作者:
冯国英，guoing_feng@scu.edu.cn。

中图分类号: TB87.1
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- 文章访问数: 165
- HTML全文浏览量: 55
- PDF下载量: 34
- 被引次数: 0
出版历程
- 收稿日期: 2024-01-20
- 修回日期: 2024-05-08
- 录用日期: 2024-05-08
- 网络出版日期: 2024-05-11
- 刊出日期: 2024-05-11

Phase measurement of vortex beam after underwater transmission based on heterodyne interference

1.
Institute of Laser and Micro/Nano Engineering, College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
2.
Laser Fusion Research Center, CAEP, Mianyang 621900, China
3.
Chengdu University of Technology, Chengdu 610059, China

摘要

摘要: 涡旋光束在湍流介质中传输时，光束相位会受到湍流运动的影响产生畸变。采用了一种基于外差干涉的点像元相位提取方法，通过采集各个点在一个周期内的干涉条纹获得的相对相位，重构出涡旋光束经过水下湍流传输后的相位分布。通过功率谱反演法生成随机相位屏，完成不同湍流强度下涡旋光束的传输仿真，结果表明光束相位畸变随着湍流强度的增大而增加。搭建了实验装置，实现了水下环境的涡旋光传输及相位测量。实验结果表明，当涡旋光在存在湍流的水下传输时，其复振幅分布经历了较为复杂的传输过程，强度分布及相位均存在畸变，所采用的方法能精确测量出涡旋光的复杂相位分布，有效完成涡旋光的拓扑荷数识别。
- 涡旋光 /
- 水下湍流 /
- 外差干涉 /
- 随机相位屏 /
- 相位测量
Abstract: When a vortex beam propagates in a turbulent medium, the phase will be distorted by the influence of turbulent motion. In this paper, a point pixel phase extraction method based on heterodyne interference is proposed. By collecting the relative phase of each point's interference fringes in a period, the phase distribution of a vortex beam is reconstructed after its turbulent transmission under water. The random phase screen is generated by the power spectrum inversion method, and the transmission simulation of the vortex beams under different turbulence is completed. The result shows that the distortion increases with the increase of turbulence intensity. An experimental device was built to realize the phase measurement of vortex beams in underwater environments. The experimental results show that when a vortex beam is transmitted in turbulent water, its complex amplitude distribution undergoes a relatively complicated transmission process, and its intensity distribution and phase are distorted. The method proposed in this paper can accurately measure the complex phase distribution of a vortex beam and effectively identify its topological charges.
- vortex beam /
- underwater turbulence /
- heterodyne interference /
- random phase screen /
- phase measurement

HTML全文

图 1 基于机械移频外差干涉的相位测量示意图

Figure 1. Schematic diagram of phase measurement based on mechanical frequency-shift heterodyne interferometry

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图 2 传输模型及仿真结果

Figure 2. Propagation model and simulated results

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图 3 方法原理、干涉条纹、包裹相位及重建结果

Figure 3. Methods principle, interference fringes, wrapping phase and reconstruction result

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图 4 两种方法相位测量结果

Figure 4. Phase measurement of vortex beams by two methods

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图 5 涡旋光相位测量结果及OAM展开谱

Figure 5. Phase measurement and spread spectra of vortex beams

下载: 全尺寸图片幻灯片

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