Research on Scattering Characteristics of Hypersonic Target With Plasma Turbulence Flow by Synthetic Double Laguerre–Gaussian Beam

Based on the hypersonic plasma model and the random phase screen theory, this study aimed to calculate the intensity and phase distribution of the scattering field when a double vortex beam passes through atmospheric turbulence and plasma targets. The results demonstrate that the combined double vortex beam exhibits superior retention of orbital angular momentum (OAM) energy compared to a general vortex beam, owing to the influence of turbulence and plasma target scattering. Furthermore, the scintillation coefficient of the laser scattering field is affected by the topological charge difference of the vortex light itself and the splitting of the light spot. It decreases initially and then increases as the topological charge difference of the double vortex beam increases. Moreover, by utilizing the scintillation index (SI) to calculate and analyze the bit error rate of the scattered field, a double vortex optical beam with a lower topological charge difference exhibits improved target detection performance. These findings offer a theoretical foundation for studying the detection of hypersonic plasma turbulence targets and investigating the "blackout" issues related to plasma sheath.