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Photonics
Volume 11
Issue 3
10.3390/photonics11030241
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Article

Spatial Mode Division Multiplexing of Free-Space Optical Communications Using a Pair of Multiplane Light Converters and a Micromirror Array for Turbulence Emulation

by
David Benton
1,*,
Yiming Li
1,
Antonin Billaud
2 and
Andrew Ellis
1
1
Aston Institute of Photonic Technologies, Aston University, Aston Triangle, Birmingham B4 7ET, UK
2
Cailabs, 1 Rue Nicolas Joseph Cugnot, 35000 Rennes, France
*
Author to whom correspondence should be addressed.
Photonics 2024, 11(3), 241; https://doi.org/10.3390/photonics11030241
Submission received: 16 January 2024 / Revised: 3 March 2024 / Accepted: 4 March 2024 / Published: 6 March 2024
(This article belongs to the Special Issue Micro-Mirror Arrays as Versatile Photonic Tools)
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Abstract

Multi-plane light converters (MPLC) are a means of deconstructing a wavefront into constituent modes that are focused at specific spatial locations, and the reverse—that specific inputs result in controlled modal output. We have used a pair of MPLCs with 21 Hermite–Gaussian modes to represent a free-space optical connection. The effects of strong atmospheric turbulence (Cn2 = 10−13 m−2/3) are emulated using a micromirror array producing a time sequence of aberrating frames. The modal crosstalk between transmitter and receiver modes induced by the turbulence is presented by measuring the intensity in receiver channels for the same turbulence. Six receiver modes are used for optical communication channels with a rate of 137 Gbits/s displaying the benefits of single input multiple output (SIMO) operation for overcoming the deleterious effects of turbulence.
Keywords: spatial division multiplexing; free-space optical communications; DMD; spatial modes; SIMO; turbulence spatial division multiplexing; free-space optical communications; DMD; spatial modes; SIMO; turbulence

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MDPI and ACS Style

Benton, D.; Li, Y.; Billaud, A.; Ellis, A. Spatial Mode Division Multiplexing of Free-Space Optical Communications Using a Pair of Multiplane Light Converters and a Micromirror Array for Turbulence Emulation. Photonics 2024, 11, 241. https://doi.org/10.3390/photonics11030241

AMA Style

Benton D, Li Y, Billaud A, Ellis A. Spatial Mode Division Multiplexing of Free-Space Optical Communications Using a Pair of Multiplane Light Converters and a Micromirror Array for Turbulence Emulation. Photonics. 2024; 11(3):241. https://doi.org/10.3390/photonics11030241

Chicago/Turabian Style

Benton, David, Yiming Li, Antonin Billaud, and Andrew Ellis. 2024. "Spatial Mode Division Multiplexing of Free-Space Optical Communications Using a Pair of Multiplane Light Converters and a Micromirror Array for Turbulence Emulation" Photonics 11, no. 3: 241. https://doi.org/10.3390/photonics11030241

APA Style

Benton, D., Li, Y., Billaud, A., & Ellis, A. (2024). Spatial Mode Division Multiplexing of Free-Space Optical Communications Using a Pair of Multiplane Light Converters and a Micromirror Array for Turbulence Emulation. Photonics, 11(3), 241. https://doi.org/10.3390/photonics11030241

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