【摘要】 激光雷达探测大气中的CO2气体目前还处在探索阶段,在差分吸收原理基础上,利用气体的受激拉曼散射增益效应,设计出测量CO2气体的非线性拉曼激光雷达系统,并模拟实验得到了增益开关两种状态下的光子计数信号,从而反演出CO2气体的浓度分布结果,在垂直方向上,CO2气体浓度随距离变化不大,合肥地区的浓度含量大约在400ppm左右。更多还原

【Abstract】 Light detection and ranging (lidar) is an attractive way to obtain carbon dioxide profiling. Based on the differential absorption lidar (DIAL) technique, using the stimulated Raman gain scattering process, the nonlinear Raman lidar system for detecting the CO2 was devised. Moreover, the signals for photons countering were achieved successfully in practice, so the concentration profile for CO2 are gained, which keep on an invariable value approximately. The value of concentration in vertical direction for CO2 gas in Hefei is about 400 ppm.更多还原