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

页码：4210 / 4213

页数：4

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