摘要
为了研究大气信道在特定条件下对光束的影响,建立基于双波长同信道传输的室内模拟大气实验系统,对不同浓度的雾气和粉尘分别进行了模拟传输实验。结果表明,空气水蒸气密度与衰减系数近似满足线性关系,且衰减系数随波长变大而减小,当雾气浓度达到一定时趋于一致;根据测量数据拟合出粉尘浓度与透射率满足指数关系,符合比尔-郎伯定律;实验测试数据结果与大气散射理论相符合。该实验结果和实验方法对研究大气对光的作用具有一定的参考价值。
In order to study effect of atmospheric channel on the beam quality under special circumstances, an indoor experiment system was built to simulate the situation dual wavelength laser passing in the same channel. Experiments were carried out under the conditions of different concentration fume and dust. It was found that attenuation coefficient linearly changed with air vapor density, the attenuation coefficient changed smaller with longer wavelength, and that it tend to the same when fume density reached to some extent. On the basis of measurement data, transmittance changed with dust concentration exponentially, which coincided with Beer-Lambert law. Experimental test data results accorded with atmospheric scattering theory. The results have reference value to study about atmospheric influence on light.
出处
《激光技术》
CAS
CSCD
北大核心
2010年第4期478-481,共4页
Laser Technology
基金
贵州省高层次人才科研特助经费资助项目(TZJF200622)
关键词
光通信
大气信道
室内模拟实验
衰减系数
粉尘浓度
透射率
optical communication
atmosphere channel
indoor simulation experiment
attenuation coefficient
dust concentration
transmittance
