Optical Orbital Angular Momentum Demultiplexing and Channel Equalization by Using Equalizing Dammann Vortex Grating. (21st June 2017)

• Record Type: Journal Article
• Authors: Su, Mingyang; Liu, Junmin; He, Yanliang; Chen, Shuqing; Li, Ying
• Other Names: Chatterjee Ashok Academic Editor.
• Is Part Of: Advances in condensed matter physics. Volume 2017(2017)
• Publication Date: 2017-06-21
• Subjects: Condensed matter -- Periodicals; Condensed matter; Periodicals; 530.41
• DOI: 10.1155/2017/6293910
• Languages: English
• ISSNs: 1687-8124

Abstract

Abstract : A novel equalizing Dammann vortex grating (EDVG) is proposed as orbital angular momentum (OAM) multiplexer to realize OAM signal demultiplexing and channel equalization. The EDVG is designed by suppressing odd diffraction orders and adjusting the grating structure. The light intensity of diffraction is subsequently distributed evenly in the diffraction orders, and the total diffraction efficiency can be improved from 53.22% to 82%. By using the EDVG, OAM demultiplexing and channel equalization can be realized. Numerical simulation shows that the bit error rate (BER) of each OAM channel can decrease to 10 - 4 when the bit SNR is 22 dB, and the intensity is distributed over the necessary order of diffraction evenly.