分析了激光声信号的理论模型。建立了研究不同水深条件下激光声特性的实验平台。研究结果表明:当水体深度在0~100m范围内逐渐增加时,激光声信号的两个相邻主峰时间间距越来越小;激光等离子体声波的峰值声压逐渐减小;空泡首次溃灭声波的峰值声压在0~20m范围内逐渐增加,在20~100m范围内逐渐减小;空泡溃灭声波峰值个数减少。 The theoretical model of laser acoustic signal is analyzed. The experimental platform for studying the acoustic properties of laser under different water depths was established. The results show that when the water depth is gradually increased from 0 to 100m, the time interval between two adjacent main peaks of the laser acoustic signal becomes smaller and smaller; the peak sound pressure of the laser plasma acoustic wave gradually decreases; the first collapse of the bubble The peak sound pressure of acoustic wave gradually increases in the range of 0 ~ 20m, and gradually decreases in the range of 20 ~ 100m. The number of the sound waves in bubble collapse decreases.