Detection of OAM State with Post Information Processing and Its Application in Communications

doi:10.13190/j.jbupt.2017-094

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2019, Vol. 42 ›› Issue (1): 133-138.doi: 10.13190/j.jbupt.2017-094

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Detection of OAM State with Post Information Processing and Its Application in Communications

ZHAO Sheng-mei^1,2, ZHANG Wen-hao¹, YAO Hao¹, GU Xiao-fan¹, LI Wei¹

1. Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
2. Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing 210003, China

Received:2017-12-27 Online:2019-02-28 Published:2019-03-08

Abstract

Abstract: 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.

Key words: orbital angular momentum, orbital angular momentum detection, orbital angular momentum spectrum, fast Fourier transform

CLC Number:

TN911.22

ZHAO Sheng-mei, ZHANG Wen-hao, YAO Hao, GU Xiao-fan, LI Wei. Detection of OAM State with Post Information Processing and Its Application in Communications[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2019, 42(1): 133-138.

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Detection of OAM State with Post Information Processing and Its Application in Communications

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