%0 Journal Article
%A GU Xiao-fan
%A LI Wei
%A YAO Hao
%A ZHANG Wen-hao
%A ZHAO Sheng-mei
%T Detection of OAM State with Post Information Processing and Its Application in Communications
%D 2019
%R 10.13190/j.jbupt.2017-094
%J Journal of Beijing University of Posts and Telecommunications
%P 133-138
%V 42
%N 1
%X In order to effectively improve the detection efficiency of orbital angular momentum (OAM), we propose an OAM detection method based on post information processing. In the proposed detection method, a Mach-Zehnder interferometer is applied, and two doves are placed in each arm of the interferometer, where one is setup to 0 degree, and the other is rotated from 0 to 180 degree. The interference beam is received and the fast Fourier transform (FFT) is operated on the received signal. In the FFT domain, each OAM component is separated, named OAM spectrum. Numerical simulation results show that it is separable for one OAM mode, and multiplexed OAM mode by the proposed OAM detection method. Different from the general OAM separation method, the proposed method can obtain the OAM information by summarizing the total energy during a period in FFT domain. And the performance of the communication system can be improved by using this detection method.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2017-094