Underwater wireless transmission of high-speed QAM-OFDM signals using a compact red-light laser.
Underwater wireless transmission of high-speed QAM-OFDM signals using a compact red-light laser.
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DOI：
10.1364/oe.24.008097
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发表时间：
2016-04
期刊：
影响因子：
3.8
通讯作者：
Jing Xu;Yuhang Song;Xiangyu Yu;Aobo Lin;Meiwei Kong;Jun Han;N. Deng
中科院分区：
文献类型：
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作者：
Jing Xu;Yuhang Song;Xiangyu Yu;Aobo Lin;Meiwei Kong;Jun Han;N. Deng
我们首先通过蒙特卡罗模拟研究了红光在水中的消光系数和信道带宽的传输特性，有趣的发现是红光在高度浑浊的水中优于蓝绿光。我们进一步提出并实验证明了一个宽带水下无线光通信系统的基础上，一个简单的和成本效益的TO 56红光激光二极管。采用128-QAM正交频分复用信号和低成本的150-MHz正-本征-负光电探测器，在6 m水下信道上实现了1.324 Gb/s的传输，误码率（BER）为2.02 × 10-3，记录频谱效率高于7.32 bits/Hz。通过使用雪崩光电探测器和32-QAM OFDM信号，我们在6 m水下信道上实现了4.883 Gb/s的创纪录比特率，BER为3.20 × 10-3。
We first study the transmission property of red light in water in terms of extinction coefficient and channel bandwidth via Monte Carlo simulation, with an interesting finding that red light outperforms blue-green light in highly turbid water. We further propose and experimentally demonstrate a broadband underwater wireless optical communication system based on a simple and cost-effective TO56 red-light laser diode. We demonstrate a 1.324-Gb/s transmission at a bit error rate (BER) of 2.02 × 10-3 over a 6-m underwater channel, by using 128-QAM OFDM signals and a low-cost 150-MHz positive-intrinsic-negative photodetector, with a record spectral efficiency higher than 7.32 bits/Hz. By using an avalanche photodetector and 32-QAM OFDM signals, we have achieved a record bit rate of 4.883 Gb/s at a BER of 3.20 × 10-3 over a 6-m underwater channel.