Average Capacity of OAM-Multiplexed FSO System with Vortex Beam Propagating Through Non-Kolmogorov Turbulence

作     者：Hua Tang Wei Xu Guohua Wu 

作者机构：School of Electronics and Information Engineering Beihang University Schoolof Electronic Engineering Beijing University of Posts and Telecommunications 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2016年第13卷第10期

页      面：153-159页

核心收录：

学科分类：070207[理学-光学] 080704[工学-流体机械及工程] 07[理学] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0803[工学-光学工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 61225003) National Natural Science Foundation of China (Grant No. 61101005 and No. 61471051) Beijing Higher Education Young Elite Teacher Project 

主　　题：laguerre-gaussian beam non-kolmogorov turbulence multiple topological charges average capacity 

摘      要：The propagation of vortex beam in atmospheric turbulence is of significant importance in theoretical study and practical applications. Based on extended Huygens-Fresnel integral and the Rytov approximation, the average capacity of orbital angular momentum(OAM)-multiplexed Laguerre-Gaussian(LG) beam propagating through non-Kolmogorov turbulence is presented, and the analytical expression of spiral spectrum of LG beam has been deduced. The average capacity of FSO system is numerically calculated and the influence of exponent parameter, transmission height, structure constant, wavelength, outer scale and inner scale on average capacity are also analyzed in detail. Outcomes show that smaller structure constant, outer scale, higher transmission height and larger wavelength, inner scale are conducive to improve average capacity in different extent. Results acquires in this paper have potential application value in optical communication within non-Kolmogorov turbulence.