激光致声技术在跨冰层介质的空中-水下通信应用方法

The method of laser-acoustic technology used in the cross-ice communication from air to underwater

无线电波、声波和光波通信技术可有效应用于复杂的海洋通信环境中,然而在极寒地区和极地区域海面冰层覆盖的情况下,其在远端发送信号将无法穿透冰层介质,而难以实现空中与水下的通信联络,故提出一种应用于跨冰层介质传输的激光致声通信体制,通过空中发射激光与海面固体冰层的互作用诱导声波信号,再利用海面上覆盖冰层的声源辐射,向下方水体传播来建立空中到水下光波与声波的通信链路,系统将光学与声学技术的有机融合,充分利用固体冰层对声波的快速传导作用,探讨光声转换机理、调制编码及激光声传输特点与性能分析,有效解决海洋通信中受冰层覆盖影响和单一种类信号传输受限问题,为海洋跨空通信提供一种新的技术途径。

Radio-frequency,acoustic and optical communication technology can be effectively used in complex marine communication environments.However,in extremely cold and Polar Regions where the sea surface is covered with ice,it is difficult to realize the communication between airs and underwater because the signals sent at the far end cannot penetrate the ice medium.In this paper,a technology based on laser-induced acoustic waves is proposed to achieve the cross-ice communication.Firstly,the acoustic signal is induced by interaction between the airborne laser and the solid ice in the air irradiating the ice cover and then propagate to the water under the ice at the sea surface,and then the acoustic radiation from the ice-covered surface is utilized to propagate to the water below to establish an airborne to underwater optical and acoustic communication link.Moreover,optical and acoustic technologies are organically integrated,the rapid conduction effect of solid ice on acoustic waves are fully used to explore the optical-acoustic conversion mechanism,modulation coding as well as the characteristics of laser-induced acoustic transmission.The problems of ice coverage and transmission limitation of a single type of signal in ocean communication can be effectively solved providing a new technical approach for ocean trans-space communication.