Propagation dynamics and crosstalk of orbital angular momentum beams influenced by supersonic wind-induced environmental disturbance
Propagation dynamics and crosstalk of orbital angular momentum beams influenced by supersonic wind-induced environmental disturbance
复制标题
超音速风致环境扰动影响轨道角动量束的传播动力学和串扰
DOI：
10.1364/oe.470734
复制
发表时间：
2022
期刊：
影响因子：
3.8
通讯作者：
Xiquan Fu
中科院分区：
文献类型：
--
作者：
Xianwei Huang;Teng Jiang;Wei Tan;Suqin Nan;Yanfeng Bai;Xiquan Fu
在机载光通信中，风诱导的近场气流是影响涡旋光束传播的重要因素，在基于轨道角动量（OAM）模式的光通信中存在不同轨道角动量模式之间的串扰。本文研究了涡旋光束在超音速风致随机环境中的传播。首先通过风洞实验对风致相位模型进行了验证，利用该相位模型分析了涡旋光束在超音速风条件下的传播，并详细讨论了涡旋光束的螺旋频谱畸变。结果表明，较大的风速和边界层厚度会增大OAM光束的畸变和螺旋谱扩展。研究了超声速风对多路涡旋光束的影响，给出了拓扑电荷间隔对多路涡旋光束的影响。我们的研究结果为评估随机气流环境对机载条件下基于oam的通信性能的影响提供了有力的工具。
Near field airflow induced by wind is an important factor influencing vortex beams propagation under airborne optical communication, and the cross-talk among different orbital angular momentum (OAM) modes occurs in OAM-based optical communication. In this paper, the propagation of vortex beams through a supersonic wind-induced random environment is investigated. The wind-induced phase model is firstly validated by wind tunnel experiment, with the phase model, vortex beams propagation under supersonic wind condition is analyzed, and the spiral spectrum distortion is discussed in detail. It is demonstrated that the larger wind velocity and boundary-layer thickness leads to the enhanced distortion and spiral spectrum expansion of OAM beams. The behavior of multiplexed vortex beams influenced by supersonic wind is also studied, and the effect of the topological charge interval is given. Our results may provide a powerful tool to estimate the effect of a random airflow environment on OAM-based communication performance under airborne condition.