Ho Kang-Ting, Chen Rui, Liu Guangyu, Shen Chao, Holguin-Lerma Jorge, Al-Saggaf Abeer A, Ng Tien Khee, Alouini Mohamed-Slim, He Jr-Hau, Ooi Boon S
Opt Express. 2018 Feb 5;26(3):3037-3045. doi: 10.1364/OE.26.003037.
This paper presents the first demonstration of InGaN multiple quantum well (MQW) based micro-photodetectors (µPD) used as the optical receiver in orthogonal frequency-division multiplexing (OFDM) modulated visible communication system (VLC). The 80-µm diameter µPD exhibits a wavelength-selective responsivity in the near-UV to violet regime (374 nm - 408 nm) under a low reverse bias of -3 V. The modulation scheme of 16-quadrature amplitude modulation (16-QAM) OFDM enables the use of frequency response beyond -3 dB cutoff bandwidth of µPD. A record high data rate of 3.2 Gigabit per second (Gpbs) was achieved as a result, which provides the proof-of-concept verification of a viable high speed VLC link.
本文首次展示了基于氮化铟镓多量子阱（MQW）的微光电探测器（µPD）用作正交频分复用（OFDM）调制可见光通信系统（VLC）中的光接收器。直径80 µm的µPD在-3 V的低反向偏压下，在近紫外到紫光波段（374 nm - 408 nm）表现出波长选择性响应度。16正交幅度调制（16-QAM）OFDM的调制方案使得能够利用µPD超过-3 dB截止带宽的频率响应。结果实现了创纪录的3.2吉比特每秒（Gpbs）的高数据速率，这为可行的高速VLC链路提供了概念验证。
