近中远红外光在雾中的传输损耗研究  

Study on the Attenuation of Different Infrareds Transmission in Fog

作　　者：丛日进[1] 汪井源[1] 王荣[1] 徐智勇[1] 程慕春 张启玮 

机构地区：[1]解放军理工大学通信工程学院 [2]中国人民解放军68036部队 [3]中国人民解放军75234部队

出　　处：《激光与光电子学进展》2014年第8期42-47,共6页Laser & Optoelectronics Progress

基　　金：江苏省科技支撑计划(BE2011177);江苏省自然科学基金(BK2011114;BK2012509);区域光纤通信网与新型光通信系统国家重点实验室开放基金(2013GZKF031304)

摘　　要：利用光子追踪法建立了红外大气信道传输模型,并给出传输损耗理论表达式。分别采用朗伯-比尔定律和蒙特卡罗仿真方法计算传输损耗,并将两个结果进行对比分析。结果显示,在能见度较低,通信距离较近时接收机接收到的散射能量不能被忽略。分析了近红外、中红外及远红外在不同能见度、通信距离下的传输损耗。结果显示,在辐射雾条件下,波长为10.6μm的远红外光传输损耗最小;在平流雾条件下,能见度小于200 m时,波长为0.85μm的近红外光传输损耗较小,能见度大于200 m时,波长为10.6μm的远红外光传输损耗最小。An infrared atmospheric transmission model is established based on photon tracing, and the theoretical equation for pass loss has also been derived. Through comparing pass losses calculated by Lambert- Beer law and Monte-Carlo method we know that the scattering energy received by the receiver cannot be ignored. The transmission characteristics of near infrared, mid-infrared and far infrared under different visibilities and communication ranges are achieved. The results reveal that the pass loss of 10.6 μm is the minimum under the radiation fog. While under the advection fog, 0.85 μm has the minimum pass loss when the visibility is below 200 m, and 10.6 μm has the minimum pass loss when the visibility is over 200 m.

关 键 词：自由空间光通信 蒙特卡罗法 米散射 雾 

分 类 号：TN929.12[电子电信—通信与信息系统]