叠加态涡旋光束经旋转随机粗糙表面的频移特性

doi:10.12263/DZXB.20201455

电子学报 ›› 2021, Vol. 49 ›› Issue (10): 1969-1974.DOI: 10.12263/DZXB.20201455

所属专题：无线光通信及其组网技术

• 无线光通信及其组网技术 • 上一篇下一篇

叠加态涡旋光束经旋转随机粗糙表面的频移特性

吕宏, 党磊, 贺蕊

西安工业大学光电工程学院，陕西西安 710021

收稿日期:2020-12-17 修回日期:2021-05-12 出版日期:2021-11-30
- 作者简介:
- 吕宏男，1975年生，山西运城人，现为西安工业大学光电工程学院副教授，主要研究方向为激光大气传输与测控技术. E-mail：lvhong@xatu.edu.cn
  党磊男，1996年生，陕西西安人，现为西安工业大学在读硕士研究生，主要研究方向为无线光通信与测控技术. E-mail：810446385@qq.com
  贺蕊（通信作者）女，1997年生，陕西咸阳人，现为西安工业大学在读硕士研究生，主要研究方向为光场传输与调控. E-mail：2279443946@qq.com
- 基金资助:
- 陕西省自然科学基础研究计划项目资助 (2019JM-470); 陕西省教育厅科研计划资助 (18JS048)

The Characteristics of Frequency Shift of Superposition Vortex Beams Passing through a Rotating Random Rough Surface

LV Hong, DANG Lei, HE Rui

School of Optoelectronic Engineering, Xi’an Technological University, Xi’an, Shaanxi 710021, China

Received:2020-12-17 Revised:2021-05-12 Online:2021-11-30 Published:2021-10-25
- Supported by:
- Supported by the Natural Science Basis Research Plan in Shaanxi Province of China (2019JM-470); sponsered by Research Project of Education Department of Shaanxi Province (18JS048)

摘要/Abstract

摘要：

论文基于涡旋光束传输特性及光散射理论，研究了叠加态涡旋光束经旋转随机粗糙表面的场分布及干涉特性.对拓扑荷值大小相同、符号相反的两束涡旋光进行了叠加生成仿真及实验，利用角谱衍射理论，分析了旋转随机粗糙表面均方根粗糙度对光束传输的影响，数值计算了不同拓扑荷值的叠加态涡旋光束经旋转随机粗糙表面后，与参考光进行干涉得到不同转速下归一化强度值随时间变化的曲线，并通过光强-时间函数间接求得频移量,再反演得到旋转目标的转速.结果表明：通过仿真曲线的周期反演频率，当转速Ω分别为2π/3 rad/s，2π rad/s，10π/3 rad/s时，对应的频移Δf分别为2/3Hz，2Hz，10/3Hz.研究结果可以为叠加涡旋光的调控及应用提供理论参考.

关键词: 叠加态涡旋光束, 旋转随机粗糙表面, 频移, 场分布, 干涉

Abstract:

Based on the transmission characteristics of vortex beams and light scattering theory, the field distribution and interference characteristics of superposition vortex beams passing through the rotating random rough surface are studied. Two vortex beams with the same topological charge value and opposite signs are used for simulation and experiment of superimposition generation. Using angular spectrum diffraction theory, the influence of the root-mean-square roughness of the rotating random rough surface on the beam transmission is analyzed. As the superposition vortex beams with different topological charges pass through the rotating random rough surface and interfere with the reference light, the time-dependent curve of normalized intensity values at different rotational speeds can be obtained through numerical calculation. Then the frequency shift can be indirectly obtained by light intensity-time function and the speed of rotating target can be obtained through inversion. The results show that: the frequency is inverted by the period of the simulation curve, and when the rotational speed Ω is 2π/3 rad/s, 2π rad/s, 10π/3 rad/s, the corresponding frequency shift Δf is 2/3Hz, 2Hz, 10/3Hz, respectively. The results of this research can provide a theoretical reference for the regulation and application of superposition vortex beams.

Key words: superposition vortex beams, rotating random rough surface, frequency shift, field distribution, interference

中图分类号:

TN929.1

吕宏, 党磊, 贺蕊. 叠加态涡旋光束经旋转随机粗糙表面的频移特性[J]. 电子学报, 2021, 49(10): 1969-1974.

LV Hong, DANG Lei, HE Rui. The Characteristics of Frequency Shift of Superposition Vortex Beams Passing through a Rotating Random Rough Surface[J]. Acta Electronica Sinica, 2021, 49(10): 1969-1974.

图/表 7

图1 叠加态涡旋光束光强分布数值模拟图

图2 信号光的光强分布数值模拟图

图3 参考光与信号光叠加的光强分布数值模拟图

图4 涡旋光束探测旋转目标转速实验方案

图5 叠加态涡旋光束光强分布实验结果图

图6 随机粗糙表面不同均方根粗糙度对干涉图样光强分布的影响

图7 不同转速下归一化强度值的时域和频域曲线图

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叠加态涡旋光束经旋转随机粗糙表面的频移特性

The Characteristics of Frequency Shift of Superposition Vortex Beams Passing through a Rotating Random Rough Surface

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