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

• 来源期刊: 光：科学与应用（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 591-599
• 页数: 9页
• 语种: 英文

摘要

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.