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在散射条件下使用连贯的异质因子检测,演示了一条8Gbit/s方位相位移关键连贯的水下无线光通信链路

Yuxiang Duan, Huibin Zhou, Zile Jiang

|August 2, 2024

概括

这项研究证明了高速,连贯的水下无线光学通信 (UWOC) 使用正方形相位移关键 (QPSK). 该系统在分散条件下实现可靠的数据传输,这对于强大的光通信链路至关重要.

科学领域:

光学工程是指光学工程.
无线通信无线通信
海洋学海洋学海洋学

背景情况:

水下无线光通信 (UWOC) 面临着分散的挑战.
连贯检测为光学链接提供了增强的接收器灵敏度.

研究的目的:

通过实验证明一个8Gbit/s的正方形相位移键 (QPSK) 连贯的UWOC链接.
在532 nm的散射条件下评估链路性能.

主要方法:

通过第二生成 (SHG) 来生成532nm的QPSK信号,从8相转换键 (8-PSK) 调制的1064nm信号.
在接收器上采用连贯的异质子检测与独立的局部振荡器 (LO).
在水中测试了链路性能,具有不同的衰减长度.

主要成果:

实现的比特错误率 (BERs) 低于2和8Gbit/s QPSK的7%前置错误校正 (FEC) 限制.
已证明的接收器灵敏度为2-Gbit/s的 -34.0 dBm,为8-Gbit/s QPSK 的 -28.4 dBm.
成功运行了UWOC链路,衰减长度 (γL) 高达7.4和6.1.1.

结论:

经过证明的8Gbit/s QPSK连贯UWOC系统在散射条件下是有效的.
连贯检测显著提高了接收器对水下光学链路的灵敏度.
这项技术显示出对高速水下数据传输的前景.

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