雾对无线激光通信系统的影响

从雾的物理特性出发，对激光在雾媒质中的传播衰减特性进行了理论研究。分别给出了无线激光通信系统的信号模型、噪声模型和透过率，并给出了不同激光波长、能见度、测量距离和接收器视场角对无线激光通信系统的影响。最后，以工作波长为10.6μm的激光为例，利用衰减率与透过率之间的关系，给出了平流雾及辐射雾中激光雾衰减随能见度、接收器视场角等的变化关系。数值分析表明：激光波长、雾的能见度、测量距离和接收器视场角对无线激光通信系统均有较大的影响。

Effects of fog on wireless laser communication systems

Based on physical characteristics of the fog,the attenuation feature of laser propagation in the fog was investigated theoretically. The signal model,noise model and transmittance of wireless laser communication systems were presented. Based on the relation between the attenuation ratio and the transmittance of the laser,the variation of the attenuation of 10.6 μm laser traveling in advection fog or radiation fog with the visibility and the FOV of the laser receiver is given. The numerical analysis results show that the performance of the wireless laser communication systems is highly dependent on laser wavelength,visibility,range and receiver FOV.