Free-space optical communications using orbital-angular-momentum multiplexing combined with MIMO-based spatial multiplexing

被引：78
|
作者：
Ren, Yongxiong [1 ]
Wang, Zhe [1 ]
Xie, Guodong [1 ]
Li, Long [1 ]
Cao, Yinwen [1 ]
Liu, Cong [1 ]
Liao, Peicheng [1 ]
Yan, Yan [1 ]
Ahmed, Nisar [1 ]
Zhao, Zhe [1 ]
Willner, Asher [1 ]
Ashrafi, Nima [2 ]
Ashrafi, Solyman [2 ]
Linquist, Roger D. [2 ]
Bock, Robert [3 ]
Tur, Moshe [4 ]
Molisch, Andreas F. [1 ]
Willner, Alan E. [1 ]
机构：
[1] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA
[2] NxGen Partners, Dallas, TX 75219 USA
[3] R DEX Syst, Marietta, GA 30068 USA
[4] Tel Aviv Univ, Sch Elect Engn, IL-69978 Tel Aviv, Israel
来源：
OPTICS LETTERS | 2015年 / 40卷 / 18期
关键词：
TRANSMISSION; LINK; BEAMS; EQUALIZATION; PERFORMANCE; CAPACITIES; CHANNELS; SYSTEMS; LIGHT;
D O I：
10.1364/OL.40.004210
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We explore the potential of combining the advantages of multiple-input multiple-output (MIMO)-based spatial multiplexing with those of orbital angular momentum (OAM) multiplexing to increase the capacity of free-space optical (FSO) communications. We experimentally demonstrate an 80 Gbit/s FSO system with a 2 x 2 aperture architecture, in which each transmitter aperture contains two multiplexed data-carrying OAM modes. Inter-channel crosstalk effects are minimized by the OAM beams' inherent orthogonality and by the use of 4 x 4 MIMO signal processing. Our experimental results show that the bit-error rates can reach below the forward error correction limit of 3.8 x 10(-3) and the power penalties are less than 3.6 dB for all channels after MIMO processing. This indicates that OAM and MIMO-based spatial multiplexing could be simultaneously utilized, thereby providing the potential to enhance system performance. (C) 2015 Optical Society of America
引用
收藏
页码：4210 / 4213
页数：4
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