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在反猎雷预警系统中,激光告警设备主要用来识别敌对激光信号的方位。水体对激光衰减使告警器性能降低,对光的吸收使接收器信噪比降低,散射使定向精度变低。使用传输方程理论建立了激光在水下传输模型,运用傅里叶变换及平面波扩展方法求解水体传输方程。利用光的互易原理及传输方程得到了探测器平面上的二维空间光强分布模型。仿真计算了探测器在清洁海水、近岸海水、浑浊海水等海水环境时直射光与散射光的响应。仿真实验结果表明所提出的方法可用于评估水下告警系统探测器接收性能。
In the anti-mine warning system, the laser warning device is mainly used to identify the hostile laser signal azimuth. Water attenuation of the laser so that the performance of the alarm to reduce the absorption of light to reduce the receiver signal to noise ratio, the scattering of the orientation accuracy becomes low. The transmission model of laser is established using the transmission equation theory. The transmission equation of water body is solved by Fourier transform and plane wave expansion method. The two-dimensional light intensity distribution model on the detector plane is obtained by using the reciprocity principle of light and the transmission equation. The response of the detector to direct light and scattered light in the seawater environment such as clean seawater, coastal seawater and turbid seawater is simulated. The simulation results show that the proposed method can be used to evaluate the receiver performance of underwater warning system.