Intra-symbol frequency-domain averaging for turbulence mitigation in optical orbital angular momentum multiplexing

被引:2
作者
Cheng, Menglong [1 ,2 ]
Wang, Chaofeng [1 ,2 ]
Zou, Haijian [1 ,2 ]
Mai, Qilin [1 ,2 ]
Liu, Junmin [3 ]
Xiao, Jiangnan [4 ]
Ye, Huapeng [5 ,6 ]
Li, Ying [1 ,2 ]
Fan, Dianyuan [1 ,2 ]
Chen, Shuqing [1 ,2 ]
机构
[1] Shenzhen Univ, Inst Microscale Optoelect, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Inst Microscale Optoelect, Engn Technol Res Ctr 2D Mat Informat Funct Device, Shenzhen 518060, Peoples R China
[3] Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China
[4] Univ Shanghai Sci & Technol, Terahertz Technol Innovat Res Inst, Shanghai 200093, Peoples R China
[5] South China Normal Univ, South China Acad Adv Optoelect, Guangdong Prov Key Lab Opt Informat Mat & Technol, Guangzhou 510006, Peoples R China
[6] South China Normal Univ, South China Acad Adv Optoelect, Inst Elect Paper Displays, Guangzhou 510006, Peoples R China
来源
OPTICS EXPRESS | 2021年 / 29卷 / 14期
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
ATMOSPHERIC-TURBULENCE; OFDM SIGNALS; COMPENSATION; BEAMS; LINK; PERFORMANCE; COMMUNICATION; PROPAGATION; DISTORTION; SYSTEM;
D O I
10.1364/OE.422136
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical vortex beams (VBs) possessing helical phase-front have attracted considerable attention in multiplexing communication for their orthogonal orbital angular momentum (OAM) modes. However, the mode-crosstalk and signal jitter caused by turbulence fluctuation are two main challenges in OAM multiplexing communication. Here, we introduce an intra-symbol frequency-domain averaging technology (ISFA) for turbulence mitigation. By equalizing the distorted multiplexing signals, ISFA mitigates the amplitude and phase jitter of received signals without adding system complexity and information redundancy. The experimental results show that VBs are successfully demultiplexed, and the transmission rate reaches 48 Gbit/s. After ISFA, the bit-error-rate of QPSK-OFDM signals is reduced from 1.10 x 10(-3) to 6.31 x 10(-4), and the error-vector-magnitude (EVM) is reduced from 31.69% to 26.29% under the turbulence strength of C-n(2) = 1 x 10(-13)m(-2/3) and equivalent transmission distance of 200 m. By combining ISFA with MIMO diversity gain, the EVM can be further reduced from 46.70% to 26.70%. These indicate that ISFA is available for turbulence mitigation and compatible with MIMO technology, which may have perspective potential in improving the performance of OAM multiplexing communication. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:21056 / 21070
页数:15
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