Research for propagation properties of LG beam through Cassegrain antenna system in a turbulent atmosphere

Abstract

In this paper, the propagation properties of the Laguerre-Gaussian (LG) beam passing through Cassegrain antenna system in a turbulent atmosphere have been researched. The accurate analytical function for the diffraction field of LG beam passing through Cassegrain antenna, the average intensity, and the cross-talk among different orbital angular momentum (OAM) modes of LG beam passing through Cassegrain antenna in Kolmogorov turbulent have been derived. The simulation results show that LG beam with ring-like distribution is selected to enhance the emission efficiency of Cassegrain antenna. The cross-talk among different OAM modes can remarkably reduce through using Cassegrain antenna. The analysis process can also apply to accurately analyzing the propagation properties of other kinds of beams through different optical systems in turbulent atmosphere.

Intensity characteristics of hypergeometric-gaussian type II beams in maritime turbulence

“…The propagation of laser beams in diverse random media has received a lot of interest from statistical optics researchers in recent decades because of the growing usage of laser beams in optical communication (Yousefi et al 2015;Li et al 2017;Boufalah et al 2018;Qin et al 2020;Chib et al 2020Chib et al , 2022Zhang et al 2020;Hricha et al 2020;Lu et al 2021;Ebrahim and Belafhal 2021;Xu et al 2022;Liu et al 2023). When we refer to a random media, we mean one that is turbulent or one whose refraction index shows significant spatial changes regarding optical wavelength.…”

Cassegrain antenna using anomalously hollow beams with orbital angular momentum to improve transmission efficiency

“…Some researchers use hollow beams to avoid losing intermediate energy. For example, Laguerre-Gaussian beams (LG), Bessel-Gaussian beams (BG) [11,12] or hollow beams created by conical lenses [13,14], but LG beams is not conducive to remote transmission and BG beams generated using computerized holography have problems with energy loss due to the use of many optical elements [15].…”