由于海水不同水域对激光信号的传输特性的影响不同, 根据不同海域海水水质参数, 分析蓝绿激光在海水光学信道中的衰减特性, 研究波长为530 nm激光时不同杂质浓度海水与信道衰减特性关系。利用蒙特卡洛方法模拟波长为530 nm激光在海水信道中的传输过程, 得到了不同杂质浓度对接收机接收功率影响的仿真图。同时利用高斯函数对仿真结果进行曲线拟合, 得到海水杂质浓度与接收机接收功率的关系模型, 从而可快速得到不同海水水质下, 任意接收位置的接收光功率, 以及不同浓度海水的衰减系数, 为以后水下激光通信接收系统的设计提供理论依据。

Because of the different water impurity effects on laser signal transmission characteristics, according to the impurity parameters of different seawater, the attenuation characteristics of blue-green laser in the optical channel of seawater are analyzed and the relationships between the different concentration and channel attenuation characteristics about the laser with a wavelength of 530 nm are studied. By using Monte Carlo method simulation, the transmission of laser with a wavelength of 530 nm in seawater channel is simulated, the simulation figures about different impurities concentration effect on received power are gotten. While fitting the simulation results by using Gaussian function, the relationship model of the concentration effects on the power of the receiver is obtained, so the power of any position in different seawater concentration can be achieved, and attenuation coefficient of different seawater concentration is gained, which can provide the theory evidence for underwater wireless laser communication.