采用紧凑型三色激光发射器的46.4 Gbps可见光通信系统。

46.4 Gbps visible light communication system utilizing a compact tricolor laser transmitter.

作者信息

Hu Junhui, Hu Fangchen, Jia Junlian, Li Guoqiang, Shi Jianyang, Zhang Junwen, Li Ziwei, Chi Nan, Yu Shaohua, Shen Chao

出版信息

Opt Express. 2022 Jan 31;30(3):4365-4373. doi: 10.1364/OE.447546.

PMID:35209674

Abstract

Visible light communication (VLC), combining wireless communication with white lighting, has many advantages. It is free of electromagnetic interference, is rich in spectrum resources, and has a gigabit-per-second (Gbps) data rate. Laser diodes (LDs) are emerging as promising light sources for high-speed VLC communication due to their high modulation bandwidth. In this paper, we demonstrate a red/green/blue (R/G/B) LDs based VLC system with a recorded data rate of 46.41 Gbps, employing discrete multitone (DMT) and adaptive bit-loading technology to achieve high spectral efficiency (SE). The emission characteristics and transmission performance of R/G/B-LDs are discussed. The optimal data rates of R/G/B-LDs channels are 17.168/14.652/14.590 Gbps, respectively. The bit-error-ratio (BER) of each channel satisfies the 7% forward-error-correction (FEC) threshold (3.8×10) and greatly approaches the channel Shannon limit.

摘要

可见光通信（VLC）将无线通信与白光照明相结合，具有诸多优势。它不受电磁干扰，频谱资源丰富，且数据速率可达每秒千兆比特（Gbps）。激光二极管（LDs）因其高调制带宽，正成为高速VLC通信中颇具前景的光源。在本文中，我们展示了一种基于红/绿/蓝（R/G/B）激光二极管的VLC系统，其记录数据速率为46.41 Gbps，采用离散多音（DMT）和自适应比特加载技术以实现高频谱效率（SE）。文中讨论了R/G/B激光二极管的发射特性和传输性能。R/G/B激光二极管通道的最佳数据速率分别为17.168/14.652/14.590 Gbps。每个通道的误码率（BER）满足7%的前向纠错（FEC）阈值（3.8×10），并极大地接近通道香农极限。