纯转动喇曼激光雷达带通滤波参数的优化研究

Optimization of Band-pass Filtering Parameters of Pure Rotational Raman Lidar by Simulated Annealing

带通滤波技术是纯转动喇曼激光雷达系统的关键单元技术,由非优化的带通滤波参数将直接导致系统探测灵敏度的降低、温度探测精度的恶化等严重后果.作者引入模拟退火算法对中心滤波波长、滤波波长间隔及滤波带宽等带通滤波参数进行了优化计算,可获得温度探测灵敏度比已有报道高3～5倍的效果.

Band-pass filtering technique is one of the key unit techniques in pure rotational Raman lidar for atmospheric temperature measurements, it has great effects on the temperature detection sensitivity and measurement precision of a practical Raman lidar system. In this paper, a global optimization algorithm, simulated annealing algorithm is employed for the design of optimum band-pass filtering parameters such as central filtering wavelength, wavelength interval, filtering bandwidth, etc., and high temperature detection sensitivity which is 3～5 times higher than currently reported results is obtained theoretically.