Toward Long-Distance Underwater Wireless Optical Communication Based on A High-Sensitivity Single Photon Avalanche Diode
Toward Long-Distance Underwater Wireless Optical Communication Based on A High-Sensitivity Single Photon Avalanche Diode
复制标题
基于高灵敏度单光子雪崩二极管的长距离水下无线光通信
DOI：
10.1109/jphot.2020.2985205
复制
发表时间：
2020-06-01
影响因子：
2.4
通讯作者：
Tian, Pengfei
中科院分区：
文献类型：
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作者：
Chen, Honglan;Chen, Xinwei;Tian, Pengfei
本研究以单光子雪崩二极管（SPAD）接收器为基础，建立了一套水下无线光通信系统。得到了不同距离和数据传输速率下UWOC的误比特率（BER）和信噪比（SNR）性能。基于0.12 m−1的水衰减系数，利用一系列中性密度（ND）滤光片来衰减来自蓝色激光二极管（LD）的光输出功率，以模拟长距离UWOC。在500 bps和2 Mbps数据传输速率下，采用开关键控（OOK）调制方式的UWOC系统的最大估计距离分别为144 m和117 m，误码率分别为1.89 × 10−3和5.31 × 10−4。此外，我们比较了自由空间和水下信道之间的差异，并在50 m的距离在自由空间中的实验测量的发散角为1.02 mrad。在这项研究中获得的长UWOC距离部分受益于高灵敏度SPAD，小的激光发散角和低的光衰减。该研究提供了一种利用SPAD实现长距离UWOC的方法。
In this study, we built a single photon avalanche diode (SPAD) receiver based underwater wireless optical communication (UWOC) system. The bit error rate (BER) and signal-to-noise ratio (SNR) performance of UWOC with different distances and data transmission rates were obtained. Based on the water attenuation coefficient of 0.12 m−1, a series of neutral density (ND) filters were exploited to attenuate the light output power from the blue laser diode (LD) to simulate the long distance UWOC. The maximum estimated distances of 144 m and 117 m with corresponding BERs of 1.89 × 10−3 and 5.31 × 10−4 at data transmission rates of 500 bps and 2 Mbps were acquired in UWOC system using on-off keying (OOK) modulation scheme, respectively. Furthermore, we compared the differences between free-space and underwater channels, and a divergence angle of ∼1.02 mrad was measured experimentally at a distance of 50 m in the free space. The long UWOC distances obtained in this study partly benefit from high sensitivity SPAD, the small laser divergence angle and low light attenuation. This study provides an approach to achieve long distance UWOC using SPAD.