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在AML-2车载测污激光雷达中,对装有不同气体的拉曼管进行拉曼激发获得相应的强、弱吸收关波长。针对差分雷达激光发射光路转换的特点及提高雷达监测的实时性能要求,基于激光偏振调制原理提出了激光雷达光路分束设计的新方法,对该方法可行性进行了理论分析,并对改进光路的能量损失进行了估算,模拟结果显示改进后的系统延长了仪器的使用寿命,提高了测量的实时性。为提高差分激光雷达实时监测性能提供了一种新方法。
In the AML-2 car-mounted lidar, Raman excitation with different gases is used to obtain the corresponding strong and weak absorption off-wavelength. Aiming at the characteristics of laser radar optical path conversion and real-time performance requirements of radar monitoring, a new laser beam splitting method based on laser polarization modulation is proposed. The feasibility of this method is analyzed theoretically. The energy loss is estimated. The simulation results show that the improved system prolongs the service life of the instrument and improves the real-time measurement. It provides a new method for improving the real-time monitoring performance of differential lidar.