对基于蓝绿激光的海水光学传输信道特性进行了分析,提出了利用蓝绿激光雷达探测海洋赤潮的新方法。利用蓝绿激光具有较强的海水透过性,可以获取较深海域的赤潮信息。通过检测海水中蓝绿激光的后向散射信号,可以实现对海洋赤潮密度信息的获取。在分析海洋赤潮粒子吸收和散射特性的基础上,建立了基于蓝绿激光雷达的海洋赤潮密度探测模型。通过仿真计算,证明该模型可以有效探测出海洋赤潮密度的大小,进而可以实现对海洋赤潮消长过程的监测和预报。 The channel characteristics of seawater optical transmission based on blue-green laser are analyzed, and a new method to detect marine red tide by using blue-green laser radar is proposed. The use of blue-green laser has a strong permeability of the sea, you can get deeper red tide information. By detecting the blue-green laser backscatter signals in the seawater, the acquisition of the information on the density of the ocean red tide can be achieved. Based on the analysis of the absorption and scattering characteristics of the marine red tide particles, a marine red tide density detection model based on blue-green laser radar was established. Through the simulation calculation, it is proved that the model can effectively detect the density of marine red tide, and then can monitor and forecast the growth and fluctuation of marine red tide.