利用激光雷达探测大气波导具有抗电磁干扰能力强、保密性高、机动性强等优点,大气折射率和消光系数是激光传输情况的重要参考指标。文中采用激光后向散射式测量仪对1. 064 μm波长激光大气传输的消光系数进行测量,并同步测量温度、湿度和大气压强来测量大气折射率,用实验数据和仿真研究激光雷达传输消光系数与大气折射率之间的相关性,结论表明二者之间存在线性关系相关,可为激光探测技术提供理论和实验参考。

The lidar detection technology for atmospheric duct has the advantage about privacy, security and flexibility. Extinction index and atmospheric refractivity are important parameters for laser transmission quality. The laser atmosphere transmission extinction index of wavelength 1. 064 μm is measured in backscatter visibility measuring set, and the temperature, the humidity and the atmosphere pressure are measured simultaneously to calculate the atmosphere refractivity. The study of correlation between refractivity and extinction index in atmosphere laser transmission is made in simulation and experimental data, the conclusion indicates that extinction index and atmospheric refractivity dependent have obvious correlation. It could provide a theoretical and experimental reference for laser detection technology.