1.54μm波长激光大气衰减系数研究

摘要

1.54μm laser which is in near-infrared band has more and more application in laser device. So in order to research the atmospheric transmission character, the paper uses three methods which include Modtran, empirical formula and experiment to obtain the attenuation coefficient of 1.54μm laser. It is pointed out that, attenuation coefficient of 1.54 μm laser will decrease conspicuously by visibility decreasing . When visibility is greater than 5 km, the theoretical data is conform to experimental data, and when visibility is less than 3 km, the empirical formula is non-application to 1.54μm laser.%处于近红外波段的1.54μm激光在目前的激光装备中有着越来越广泛的应用，因而为了研究1.54μm 激光的大气传输特性，采用 Modtran 大气传输软件计算、经验公式计算和设计实验测量3种方法得到了1.54μm激光在不同天气条件下的大气衰减系数，结果表明：1.54μm激光的衰减系数随能见度的提高而显著减小；在能见度大于5 km时，理论计算数据与实验数据吻合较好，而在能见度小于3 km的较差能见度下，经验公式对1.54μm激光已不再适用。