Gb/s Underwater Wireless Optical Communications Using Series-Connected GaN Micro-LED Arrays
Gb/s Underwater Wireless Optical Communications Using Series-Connected GaN Micro-LED Arrays
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DOI：
10.1109/jphot.2019.2959656
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发表时间：
2020-04
影响因子：
2.4
通讯作者：
G. Arvanitakis;E. Gu;H. Haas;M. Dawson;R. Bian;J. McKendry;Chen Cheng;E. Xie;Xiangyu He;Gang Yang;M. S. Islim;A. A. Purwita-A.
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文献类型：
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作者：
G. Arvanitakis;E. Gu;H. Haas;M. Dawson;R. Bian;J. McKendry;Chen Cheng;E. Xie;Xiangyu He;Gang Yang;M. S. Islim;A. A. Purwita-A.
高速无线通信是许多工业和科学水下应用非常需要的。声波通信具有高延迟和有限的数据速率，而射频通信则受到海水中衰减的严重限制。光通信是一种很有前途的替代方案，提供高传输速率（高达Gb/s），而水在可见光波段的衰减相对较低。在这里，我们演示了串联微型发光二极管（μLED）阵列的使用，该阵列由6个μLED像素组成，直径为60 μm或80 μm，工作波长为450 nm。这些器件增加了输出功率，同时保持了相对较高的调制带宽。使用正交频分复用（OFDM），我们演示了水下无线数据传输速率分别为4.92 Gb/s、3.22 Gb/s和3.4 Gb/s，在1.5 m、3 m和4.5 m范围内，通过清澈的自来水，相应的误码率（ber）为1.5 × 10−3、1.1 × 10−3和3.1 × 10−3，在浑浊的水中，通过bbb5衰减长度（ALs），速率为Mb/s。
High speed wireless communications are highly desirable for many industrial and scientific underwater applications. Acoustic communications suffer from high latency and limited data rates, while Radio Frequency communications are severely limited by attenuation in seawater. Optical communications are a promising alternative, offering high transmission rates (up to Gb/s), while water has relatively low attenuation at visible wavelengths. Here we demonstrate the use of series-connected micro-light-emitting-diode (μLED) arrays consisting of 6 μLED pixels either 60 μm or 80 μm in diameter and operating at 450 nm. These devices increase the output power whilst maintaining relatively high modulation bandwidth. Using orthogonal frequency division multiplexing (OFDM) we demonstrate underwater wireless data transmission at rates of up to 4.92 Gb/s, 3.22 Gb/s and 3.4 Gb/s over 1.5 m, 3 m and 4.5 m, respectively, with corresponding bit error ratios (BERs) of 1.5 × 10−3, 1.1 × 10−3 and 3.1 × 10−3, through clear tap water, and Mb/s rates through >5 attenuation lengths (ALs) in turbid waters.