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

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.