Gerçekcioğlu Hamza, Baykal Yahya
J Opt Soc Am A Opt Image Sci Vis. 2021 Jun 1;38(6):862-868. doi: 10.1364/JOSAA.424523.
Minimization of the on-axis scintillation index of sinusoidal Gaussian beams is investigated by using the modified Rytov method in weak atmospheric turbulence for uplink/downlink of aerial vehicle-satellite laser communications. Among the focused cosh-Gaussian (cosh-G), cos-Gaussian (cos-G), annular, and Gaussian beams, a suitable displacement parameter for a cosh-G beam is determined that will minimize the scintillation index in uplink and downlink configurations. Then, for both uplink and downlink, the variations of the scintillation index against the propagation distance, source size, and zenith angle are examined and compared among themselves to show the optimum beam that possesses the minimum scintillation index. Sinusoidal Gaussian beams that are focused at the receiver and obtained by employing the appropriate displacement parameter, which we name the optimum beams, are recommended to obtain smaller intensity fluctuations in atmospheric wireless optical communication systems operating in vertical links in weak turbulence.
利用修正的Rytov方法，研究了在弱大气湍流条件下，用于飞行器 - 卫星激光通信上行链路/下行链路的正弦高斯光束轴上闪烁指数的最小化问题。在聚焦双曲余弦高斯（cosh - G）光束、余弦高斯（cos - G）光束、环形光束和高斯光束中，确定了一个适合cosh - G光束的位移参数，该参数将使上行链路和下行链路配置中的闪烁指数最小化。然后，针对上行链路和下行链路，研究并比较了闪烁指数随传播距离、源尺寸和天顶角的变化情况，以展示具有最小闪烁指数的最佳光束。建议在弱湍流垂直链路中运行的大气无线光通信系统中，采用适当的位移参数聚焦于接收器并获得的正弦高斯光束（我们称之为最佳光束），以获得较小的强度波动。
