点阵列声源激发大气湍流特性对光波传输闪烁指数特性的影响研究  

Effect of Point-Array Coherent Sound Source on Scintillation Index of Light Wave in Atmospheric Turbulence Transmission

作　　者：王文静 王明军[1,2] Wang Wenjing;Wang Mingjun(School of Automation and Inform ation Engineering,Xi'an University of Technology,Xi'an,Shaanxi 710048,China;Shaanxi Civil-Military Integra tion Key Laboratory of Intelligence Collabora tive Networks,Xi'an,Shaanxi 710126,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]陕西省智能协同网络军民共建重点实验室,陕西西安710126

出　　处：《激光与光电子学进展》2021年第1期97-103,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61771385);国防重点实验室基金(6142404180301);陕西省自然科学基金(2018JQ6094)。

摘　　要：声波运动可以改变周围大气压强,进而影响大气的折射率分布。基于声波的波动方程和叠加原理,结合大气折射率的计算公式,求解出点阵列相干声源激发的人工大气折射率不均匀体的空间分布。基于Rytov近似,给出了点阵列相干声源激发的压强和光波闪烁指数之间的数值关系,分析了点阵列相干声源参数改变对光波闪烁指数的影响。结果表明:声源能激发产生大气折射率不均匀体,引起光波出现光强起伏。声源各个参数的改变,会引起光波闪烁指数出现不同程度的起伏变化。该研究结果初步探索了阵列相干声波激发人工大气折射率不均匀体参数对激光传输特性的影响。The sound wave movement can change the surrounding atmospheric pressure and further affect the atmospheric refractive index distribution. Based on the wave equation and superposition principle of acoustic waves and the calculation formula of atmospheric refractive index,this paper solves the spatial distribution of artificial atmospheric refractive index heterogeneous body excited by point-array coherent sound source. Based on the Rytov approximation,the numerical relationship between the pressure excited by the point-array coherent sound source and the light wave flicker index is given,and the influence of the change of the point-array coherent sound source parameters on the light wave scintillation index is analyzed. The results show that the sound source can excite the uneven refractive index of the atmosphere,causing light intensity fluctuations. Changes in various parameters of the sound source can cause fluctuations in the light wave flicker index to varying degrees. The research results in this paper have preliminary explored the influence of array coherent acoustic waves on the laser transmission characteristics under the condition of artificial atmospheric refractive index heterogeneous body.

关 键 词：大气光学 点阵列相干声源 大气折射率 闪烁指数 

分 类 号：O436[机械工程—光学工程]