声光耦合同轴大气传输背景中的涡旋光场相位特性研究  

Phase Characteristics of Vortex Optical Fields in Acousto-Optically Coupled Coaxial Atmospheric Transport Background

作　　者：王明军[1,2,3] 刘敏 张佳琳 黄朝军 Wang Mingjun;Liu Min;Zhang Jialin;Huang Chaojun(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China;Xi’an Key Laboratory of Wireless Optical Communication and Network Research,Xi’an 710048,Shaanxi,China;School of Physics and Telecommunication Engineering,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China)

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]西安市无线光通信和网络研究重点实验室,陕西西安710048 [3]陕西理工大学物理与电信工程学院,陕西汉中723001

出　　处：《激光与光电子学进展》2024年第23期114-124,共11页Laser & Optoelectronics Progress

基　　金：国家自然科学基金重大研究计划培育项目(92052106);国家自然科学基金(61771385);陕西省重点产业链创新团队(2024RS-CXTD-12);陕西省高等学校创新团队;西安市重点产业链关键核心技术攻关项目(103-433023062);咸阳市重点研发计划(L2023-ZDYF-QYCX-025);河南省可见光通信重点实验室基金(HKLVLC2023-B05)。

摘　　要：基于声光效应、传输矩阵法和平面角谱展开理论,利用声场改变大气介质折射率,建立了拉盖尔-高斯(LG)光束在声光耦合同轴大气介质中的传输模型,研究了不同声波频率和不同拓扑荷数对LG光束传输特性的影响。结果表明:经平面声场扰动后,大气介质的折射率呈均匀的周期性分布,声源频率不同,折射率分层周期不同;LG光束在分层大气介质中传输时p波的相位分布始终出现中心轴;入射场s波和透射场s波相位分布始终相同,由中心向四周旋转;LG光束的拓扑荷数相反时,s波相位旋转方向相反,p波相位旋转方向相反且相位分布发生改变;声波频率不同导致LG光束传输路径上的折射率分布周期不同,从而影响LG光束传输的相位,改变声波频率可以影响LG光束在声场扰动产生的分层介质中传输的相位特性。研究结果可为后续开展声场对涡旋光传输特性的实验研究提供理论支撑。Based on the acousto-optic effect,transmission matrix method,and planar angular spectral expansion theory,the transmission model of Laguerre-Gaussian(LG)beams in an acousto-optically coupled coaxial atmospheric medium is established,and the acoustic field is used to change the refractive index of the atmospheric medium.Furthermore,effects of different acoustic frequencies and topological charges on the transmission characteristics of LG beams are investigated.Results show that the refractive index of the atmospheric medium is periodically and uniformly distributed after the plane acoustic field is perturbed,and the refractive index stratification period varies for different acoustic source frequencies.The phase distribution of the p-wave always appears on the central axis when LG beam transfers in the layered atmospheric medium.The phase distributions of the s-wave of the incident and transmitted fields remain the same and rotate from the center to the surroundings.The rotational direction of the s-wave phase and p-wave phase are opposite when the topological load of LG beam is opposite,and the phase distribution of p-wave changes.Different acoustic wave frequencies lead to varying refractive index distribution cycles in the transmission path of the LG beam,thereby affecting the phase characteristics of LG beam transmission in the layered medium generated by the acoustic field perturbation.Research results in this paper provide theoretical support for future experimental investigations into the impact of the acoustic field on the transmission characteristics of vortex light.

关 键 词：拉盖尔-高斯光束 分层介质 平面声波 相位 

分 类 号：O426.3[理学—声学]