This paper uses a numerical simulation method to evaluate the propagation performance of the partially coherent flat-topped vortex hollow (FTVH) beam and the Gaussian Schell-model (GSM) beam through atmospheric turbulence along slant links. The atmospheric turbulence is simulated by random phase screens, and the performance of the beam models is evaluated by using scintillation index and signal-to-noise (SNR) on the receiver plane with various simulation conditions and parameters. This paper has shown that there is an optimal coherence length for both the partially coherent FTVH beam and the GSM beam. In different parameter settings, the partially coherent FTVH beam has the best propagation performance at N = 1 M = 1. Compared to the GSM beam, the partially coherent FTVH beam obtains an obvious improvement in SNR. The results show that the partially coherent FTVH beam is able to improve the communication efficiency of an FSOC system.

本文采用数值模拟方法来评估部分相干平顶涡流空心 (FTVH) 光束和高斯谢尔模型 (GSM) 光束通过大气湍流沿倾斜链路的传播性能。通过随机相位屏模拟大气湍流，并通过使用各种模拟条件和参数在接收器平面上使用闪烁指数和信噪比（SNR）来评估波束模型的性能。该论文表明，部分相干 FTVH 波束和 GSM 波束都存在最佳相干长度。在不同的参数设置下，部分相干FTVH光束在N  = 1 M时 传播性能最好= 1. 与GSM波束相比，部分相干FTVH波束在SNR上获得了明显的改善。结果表明，部分相干FTVH波束能够提高FSOC系统的通信效率。