Reconfigurable beam system for non-line-of-sight free-space optical communication

Zizheng Cao; Xuebing Zhang; Gerwin Osnabrugge; Juhao Li; Ivo M. Vellekoop; Antonius M.J. Koonen

doi:10.1038/s41377-019-0177-3

Reconfigurable beam system for non-line-of-sight free-space optical communication

Zizheng Cao (Corresponding author), Xuebing Zhang, Gerwin Osnabrugge, Juhao Li, Ivo M. Vellekoop (Corresponding author), Antonius M.J. Koonen (Corresponding author)

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Abstract

In this paper, we propose a reconfigurable beam-shaping system to permit energy-efficient non-line-of-sight (NLOS) free-space optical communication. Light is steered around obstacles blocking the direct communication pathway and reaches a receiver after reflecting off of a diffuse surface. A coherent array optical transmitter (CAO-Tx) is used to spatially shape the wavefront of the light incident on a diffuse surface. Wavefront shaping is used to enhance the amount of diffusely reflected light reaching the optical receiver. Synthetic NLOS experiments for a signal reflected over an angular range of 20° are presented. A record-breaking 30-Gbit/s orthogonal frequency-division multiplexing signal is transmitted over a diffused optical wireless link with a >17-dB gain.

Original language	English
Article number	69
Number of pages	9
Journal	Light: Science and Applications
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41377-019-0177-3
Publication status	Published - 24 Jul 2019

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AU - Vellekoop, Ivo M.

AU - Koonen, Antonius M.J.

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Reconfigurable beam system for non-line-of-sight free-space optical communication

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