Coherent Separation Detection for Orbital Angular Momentum Multiplexing in Free-Space Optical Communications

Xiaoke Zhang; Yanliang He; Yao Cai; Mingyang Su; Xinxing Zhou; Yu Chen; Shuqing Chen; Yuanjiang Xiang; Lin Chen; Chenliang Su; Ying Li; Dianyuan Fan

doi:10.1109/JPHOT.2017.2694885

IEEE Photonics Journal (Jan 2017)

Coherent Separation Detection for Orbital Angular Momentum Multiplexing in Free-Space Optical Communications

Xiaoke Zhang,
Yanliang He,
Yao Cai,
Mingyang Su,
Xinxing Zhou,
Yu Chen,
Shuqing Chen,
Yuanjiang Xiang,
Lin Chen,
Chenliang Su,
Ying Li,
Dianyuan Fan

Affiliations

Xiaoke Zhang: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Yanliang He: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Yao Cai: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Mingyang Su: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Xinxing Zhou: Synergetic Innovation Center for Quantum Effects and Applications, College of Physics and Information Science, Hunan Normal University, Changsha, China
Yu Chen: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Shuqing Chen: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Yuanjiang Xiang: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Lin Chen: Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, China
Chenliang Su: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Ying Li: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China
Dianyuan Fan: International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, China

DOI: https://doi.org/10.1109/JPHOT.2017.2694885
Journal volume & issue: Vol. 9, no. 3
pp. 1 – 11

Abstract

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Beams carrying orbital angular momentum (OAM) are very helpful in enhancing the information carrying capacity in free-space optical communications. However, atmospheric turbulence and energy attenuation will seriously affect communication quality and signal transmissions. Here, a novel coherent separation detection technology for OAM mode division multiplexing is proposed, and numerical simulation work is conducted. With the proposed structure, two light beams with different OAM states, each encoded with 16-quadrature-amplitude modulation orthogonal frequency-modulated (QAM-OFDM) signals, can be demultiplexed and allow two orders of magnitude bit error rate (BER) lower than direct separation detection. Moreover, we show the scalability of multiplexing four OAM beams, achieving a 20 m free-space transmission with BER below 3.8 × 10–3 for all channels at signal-noise ratio (SNR) 18 dB. Our results show that coherent separation detection has excellent antinoise performance and can effectively extend the communication distance. It also paves the way for entirely new coherent optical OAM communications.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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