Wei Zixian, Zhang Li, Wang Lei, Chen Chien-Ju, Pepe Alberto, Liu Xin, Chen Kai-Chia, Wu Meng-Chyi, Dong Yuhan, Wang Lai, Luo Yi, Fu H Y
Opt Lett. 2020 May 1;45(9):2616-2619. doi: 10.1364/OL.393664.
Blue/green light-emitting diodes (LEDs) show great potential in medium/short distance underwater optical wireless communication (UOWC) while suffering limited bandwidth caused by a long radiative recombination carrier lifetime and large resistance-capacitance (RC) constant. We designed, fabricated, and packaged a 75-µm single-layer quantum dot (QD) blue micro-LED with a record high modulation bandwidth up to 1.03 GHz. The single-layer structure of QD reduces the carrier lifetime and RC delay. A data rate of 2 Gbps over a 3-m air-underwater channel using a non-return-to-zero on-off-keying modulation format with a low bit-error rate of 2.03×10 was achieved below the forward error correction limit, which is the highest data rate of micro-LED-based UOWC systems, to the best of our knowledge.
蓝/绿光发光二极管（LED）在中/短距离水下光无线通信（UOWC）中显示出巨大潜力，但其受限于长辐射复合载流子寿命和大电阻电容（RC）常数所导致的有限带宽。我们设计、制造并封装了一个75微米的单层量子点（QD）蓝色微型LED，其调制带宽高达1.03 GHz，创历史新高。量子点的单层结构减少了载流子寿命和RC延迟。据我们所知，在3米的空气-水下信道上，采用非归零开关键控调制格式，实现了2 Gbps的数据速率，误码率低至2.03×10，低于前向纠错极限，这是基于微型LED的UOWC系统的最高数据速率。
