The distortion of the laser beam caused by atmospheric turbulence has always been a major impediment in free space optical communication (FSOC) system. The atmospheric turbulence is mainly from the changes of the random refractive index in the atmosphere and leads to the random distribution of beam intensity. A phase-conjugate beam can effectively correct this type of deformation. In our research, by degenerate four-wave mixing (DFWM) method, a phase-conjugate beam is generated through a methyl orange doped polyvinyl alcohol solution to correct the mirror-reflected beam through a turbulence promoter. In comparison with the mirror-reflected beam, the phase-conjugate beam has a better near-Gaussian intensity distribution. The results show that the phase-conjugate beam has a positive effect on the correction of distortion caused by turbulence.

大气湍流引起的激光束畸变一直是自由空间光通信（FSOC）系统的主要障碍。大气湍流主要来自大气中随机折射率的变化，导致光束强度的随机分布。相位共轭梁可以有效地校正这种变形。在我们的研究中，通过简并四波混合（DFWM）方法，通过甲基橙掺杂的聚乙烯醇溶液产生相位共轭光束，以通过湍流促进剂校正镜面反射光束。与镜面反射光束相比，相位共轭光束具有更好的近高斯强度分布。结果表明，相位共轭光束对湍流引起的畸变校正具有积极作用。