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

Zizheng Cao*, Xuebing Zhang, Gerwin Osnabrugge, Juhao Li, Ivo M. Vellekoop, Ton M.J. Koonen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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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 languageEnglish
Article number69
JournalLight: Science and Applications
Issue number1
Publication statusPublished - 24 Jul 2019

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