Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization

Yongxiong Ren; Zhe Wang; Guodong Xie; Long Li; Asher J. Willner; Yinwen Cao; Zhe Zhao; Yan Yan; Nisar Ahmed; Nima Ashrafi; Solyman Ashrafi; Robert Bock; Moshe Tur; Alan E. Willner

doi:10.1364/OL.41.002406

Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization

Yongxiong Ren^*, Zhe Wang, Guodong Xie, Long Li, Asher J. Willner, Yinwen Cao, Zhe Zhao, Yan Yan, Nisar Ahmed, Nima Ashrafi, Solyman Ashrafi, Robert Bock, Moshe Tur, Alan E. Willner

^*Corresponding author for this work

School of Electrical Engineering

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

97 Scopus citations

Abstract

We explore the mitigation of atmospheric turbulence effects for orbital angular momentum (OAM)-based free-space optical (FSO) communications with multiple-input multiple-output (MIMO) architecture. Such a system employs multiple spatially separated aperture elements at the transmitter/receiver, and each transmitter aperture contains multiplexed data-carrying OAM beams. We propose to use spatial diversity combined with MIMO equalization to mitigate both weak and strong turbulence distortions. In a 2 x 2 FSO link with each transmitter aperture containing two multiplexed OAM modes of ℓ = +1 and ℓ = +3, we experimentally show that at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.

Original language	English
Pages (from-to)	2406-2409
Number of pages	4
Journal	Optics Letters
Volume	41
Issue number	11
DOIs	https://doi.org/10.1364/OL.41.002406
State	Published - 1 Jun 2016

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title = "Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization",

abstract = "We explore the mitigation of atmospheric turbulence effects for orbital angular momentum (OAM)-based free-space optical (FSO) communications with multiple-input multiple-output (MIMO) architecture. Such a system employs multiple spatially separated aperture elements at the transmitter/receiver, and each transmitter aperture contains multiplexed data-carrying OAM beams. We propose to use spatial diversity combined with MIMO equalization to mitigate both weak and strong turbulence distortions. In a 2 x 2 FSO link with each transmitter aperture containing two multiplexed OAM modes of ℓ = +1 and ℓ = +3, we experimentally show that at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.",

author = "Yongxiong Ren and Zhe Wang and Guodong Xie and Long Li and Willner, {Asher J.} and Yinwen Cao and Zhe Zhao and Yan Yan and Nisar Ahmed and Nima Ashrafi and Solyman Ashrafi and Robert Bock and Moshe Tur and Willner, {Alan E.}",

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T1 - Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization

AU - Ren, Yongxiong

AU - Wang, Zhe

AU - Xie, Guodong

AU - Li, Long

AU - Willner, Asher J.

AU - Cao, Yinwen

AU - Zhao, Zhe

AU - Yan, Yan

AU - Ahmed, Nisar

AU - Ashrafi, Nima

AU - Ashrafi, Solyman

AU - Bock, Robert

AU - Tur, Moshe

AU - Willner, Alan E.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - We explore the mitigation of atmospheric turbulence effects for orbital angular momentum (OAM)-based free-space optical (FSO) communications with multiple-input multiple-output (MIMO) architecture. Such a system employs multiple spatially separated aperture elements at the transmitter/receiver, and each transmitter aperture contains multiplexed data-carrying OAM beams. We propose to use spatial diversity combined with MIMO equalization to mitigate both weak and strong turbulence distortions. In a 2 x 2 FSO link with each transmitter aperture containing two multiplexed OAM modes of ℓ = +1 and ℓ = +3, we experimentally show that at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.

AB - We explore the mitigation of atmospheric turbulence effects for orbital angular momentum (OAM)-based free-space optical (FSO) communications with multiple-input multiple-output (MIMO) architecture. Such a system employs multiple spatially separated aperture elements at the transmitter/receiver, and each transmitter aperture contains multiplexed data-carrying OAM beams. We propose to use spatial diversity combined with MIMO equalization to mitigate both weak and strong turbulence distortions. In a 2 x 2 FSO link with each transmitter aperture containing two multiplexed OAM modes of ℓ = +1 and ℓ = +3, we experimentally show that at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.

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Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization

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