Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization

Hao Huang; Yinwen Cao; Guodong Xie; Yongxiong Ren; Yan Yan; Changjing Bao; Nisar Ahmed; Mark A. Neifeld; Samuel J. Dolinar; Alan E. Willner

doi:10.1364/OL.39.004360

Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization

Hao Huang, Yinwen Cao, Guodong Xie, Yongxiong Ren, Yan Yan, Changjing Bao, Nisar Ahmed, Mark A. Neifeld, Samuel J. Dolinar, Alan E. Willner

Research output: Contribution to journal › Article › peer-review

146 Scopus citations

Abstract

We demonstrate crosstalk mitigation using 4 × 4 multiple-input- multiple-output (MIMO) equalization on an orbital angular momentum (OAM) multiplexed free-space data link with heterodyne detection. Four multiplexed OAM beams, each carrying a 20 Gbit/s quadrature phase-shift keying signal, propagate through weak turbulence. The turbulence induces inter-channel crosstalk among each beam and degrades the signal performance. Experimental results demonstrate that with the assistance of MIMO processing, the signal quality and the bit-error-rate (BER) performance can be improved. The power penalty can be reduced by >4 dB at a BER of 3.8 × 10^-3.

Original language	English (US)
Pages (from-to)	4360-4363
Number of pages	4
Journal	Optics letters
Volume	39
Issue number	15
DOIs	https://doi.org/10.1364/OL.39.004360
State	Published - Aug 1 2014
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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Cite this

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title = "Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization",

abstract = "We demonstrate crosstalk mitigation using 4 × 4 multiple-input- multiple-output (MIMO) equalization on an orbital angular momentum (OAM) multiplexed free-space data link with heterodyne detection. Four multiplexed OAM beams, each carrying a 20 Gbit/s quadrature phase-shift keying signal, propagate through weak turbulence. The turbulence induces inter-channel crosstalk among each beam and degrades the signal performance. Experimental results demonstrate that with the assistance of MIMO processing, the signal quality and the bit-error-rate (BER) performance can be improved. The power penalty can be reduced by >4 dB at a BER of 3.8 × 10-3.",

author = "Hao Huang and Yinwen Cao and Guodong Xie and Yongxiong Ren and Yan Yan and Changjing Bao and Nisar Ahmed and Neifeld, \{Mark A.\} and Dolinar, \{Samuel J.\} and Willner, \{Alan E.\}",

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doi = "10.1364/OL.39.004360",

language = "English (US)",

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T1 - Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization

AU - Huang, Hao

AU - Cao, Yinwen

AU - Xie, Guodong

AU - Ren, Yongxiong

AU - Yan, Yan

AU - Bao, Changjing

AU - Ahmed, Nisar

AU - Neifeld, Mark A.

AU - Dolinar, Samuel J.

AU - Willner, Alan E.

PY - 2014/8/1

Y1 - 2014/8/1

N2 - We demonstrate crosstalk mitigation using 4 × 4 multiple-input- multiple-output (MIMO) equalization on an orbital angular momentum (OAM) multiplexed free-space data link with heterodyne detection. Four multiplexed OAM beams, each carrying a 20 Gbit/s quadrature phase-shift keying signal, propagate through weak turbulence. The turbulence induces inter-channel crosstalk among each beam and degrades the signal performance. Experimental results demonstrate that with the assistance of MIMO processing, the signal quality and the bit-error-rate (BER) performance can be improved. The power penalty can be reduced by >4 dB at a BER of 3.8 × 10-3.

AB - We demonstrate crosstalk mitigation using 4 × 4 multiple-input- multiple-output (MIMO) equalization on an orbital angular momentum (OAM) multiplexed free-space data link with heterodyne detection. Four multiplexed OAM beams, each carrying a 20 Gbit/s quadrature phase-shift keying signal, propagate through weak turbulence. The turbulence induces inter-channel crosstalk among each beam and degrades the signal performance. Experimental results demonstrate that with the assistance of MIMO processing, the signal quality and the bit-error-rate (BER) performance can be improved. The power penalty can be reduced by >4 dB at a BER of 3.8 × 10-3.

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Crosstalk mitigation in a free-space orbital angular momentum multiplexed communication link using 4×4 MIMO equalization

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