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.

在本文中，我们提出了一种可重构光束整形系统，以实现节能的非视距（NLOS）自由空间光通信。光绕过阻碍直接通信路径的障碍物，并在漫射表面反射后到达接收器。相干阵列光发射器 (CAO-Tx) 用于对漫射表面上入射光的波前进行空间整形。波前整形用于增强到达光接收器的漫反射光量。介绍了在 20° 角度范围内反射的信号的综合 NLOS 实验。破纪录的 30 Gbit/s 正交频分复用信号通过扩散光学无线链路传输，增益 >17 dB。