单光子激光探测中大气传输及背景辐射的影响  

Influence of atmospheric transmission and background radiation in single-photon laser detection

作　　者：缪瑞晴 王励横 徐广平 韩隆[1] 许连望 赵宇昊 丁浩宇 MIAO Rui-qing;WANG Li-heng;XU Guang-ping;HAN Long;XU Lian-wang;ZHAO Yu-hao;DING Hao-yu(The 11th Research Institute of CETC,Beijing 100015,China;The Second Military Representative Office of the Army Equipment Department in Beijing,Beijing 100012,China)

机构地区：[1]中国电子科技集团公司第十一研究所,北京100015 [2]陆装驻北京地区第二军代室,北京100012

出　　处：《激光与红外》2025年第4期554-561,共8页Laser & Infrared

摘　　要：单光子激光测距技术由于具有高探测灵敏度而被广泛应用于各种测距场景。为探究单光子探测体制下,大气传输和背景辐射参数对1064nm波段背景噪声的影响,本文使用两种大气辐射传输仿真工具MODTRAN和CART对水平路径下不同探测条件中的大气透过率和太阳辐射参数进行计算和对比,进一步仿真分析其对背景噪声计数率的影响。研究发现,白天测距时,越接近正午时刻,背景噪声越小,越有利于探测;当探测高度高于3km时可以基本摆脱地表能见度对背景噪声的影响,且探测高度越高,背景噪声越小;且在探测高度高,探测距离近的应用场景中,不可忽略目标背景辐射。本文可以为全天候不同探测条件下的单光子激光机载远程测距系统设计提供背景噪声水平的参考。Single-photon laser ranging technology has gained widespread application across various ranging scenarios due to its high detection sensitivity.To investigate the impact of atmospheric transmission and background radiation parameters on the background noise at the 1064 nm wavelength under the single-photon detection regime,two atmos-pheric radiative transfer simulation tools,MODTRAN and CART,are used to calculate and compare the atmospheric transmittance and solar radiation parameters under different detection conditions along a horizontal path,and further simulate and analyze their impact on the background noise count rates.It is found that during daytime ranging,the closer to noon,the lower the background noise,which is more conducive to detection.Additionally,when the detection altitude exceeds 3 km,the influence of ground visibility on background noise is essentially negated,and the higher the detection altitude,the lower the background noise.Moreover,in scenarios with high detection altitude and short detection distance,target background radiation should not be neglected.This paper can provide a valuable reference for the background noise levels in the design of airborne single-photon laser long-range ranging systems,particularly under all-weather conditions and various detection scenarios.

关 键 词：单光子激光测距 大气透过率 太阳辐射 背景噪声计数率 MODTRAN CART 

分 类 号：TN249[电子电信—物理电子学]