海洋光学系统中的时空方法

海洋光学系统在海洋探索、开发和监测中起到了越来越重要的作用。水下无线光通信、水下激光雷达是两种迅速发展且有良好应用前景的海洋光学系统。水下无线光通信凭借高速率与低延迟的特点在中短距离应用中成为理想的通信选择; 水下激光雷达在获取地理信息、目标探测等应用中也是常用的高精度、高效率的观测方法。然而, 海水信道的复杂光学特性为海洋光学系统性能的进一步提升带来了挑战。在海水信道中, 不仅吸收与散射作用较强, 而且信道中可能有湍流、气泡等动态变化的干扰因素。为应对这些挑战, 一方面可通过时间或空间方法提高信噪比; 另一方面, 时空信息转换的方法有利于提升系统的性能。文中对以上解决方案进行综述, 并指出海洋光学系统的发展趋势。

Abstract

Ocean optical systems have played an increasingly important role in ocean exploration, development and monitoring. Underwater wireless optical communication and underwater lidar are two types of ocean optical systems that are rapidly developing and have good application prospects. Underwater wireless optical communication is an ideal communication option for short and medium range applications due to high speed and low latency. Underwater lidar is also a highly precise and efficient observation method in applications like deriving geographic information and target detection. However, the complex optical characteristics of seawater channels have brought challenges to the further improvement of the performance of ocean optical systems. In seawater channels, not only strong absorption and scattering, but also dynamic interference factors such as turbulence and bubbles exist in the channel. In order to deal with these challenges, on one hand, signal to noise ratio can be increased with temporal or spatial methods. On the other hand, the conversion between temporal and spatial domains is beneficial to achieving better system performance. This article reviews solutions above and the development trend of ocean optical systems is pointed out.

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张雨凡, 徐敬. 海洋光学系统中的时空方法[J]. 红外与激光工程, 2020, 49(2): 0203003. Zhang Yufan, Xu Jing. Temporal and spatial methods in ocean optical systems[J]. Infrared and Laser Engineering, 2020, 49(2): 0203003.

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