理论分析表明,双边缘瑞利测风激光雷达技术中,信号通道分光精度影响风速测量精度。因此,在风速误差计算上,需考虑分光比误差,且尽量选择分光稳定性好的仪器。在激光雷达中,常常利用光纤分束器与分束片进行分光。分束片的分光受大气退偏振效应影响,分光不稳定;而光纤分束器分光比需测量,存在测量误差。分析可得,在纯分子散射环境下,由于退偏振效应引起分光片的相对变化为0.07%~0.63%;实验测得多模光纤分束器分光比均值为1.018,标准偏差为0.4%,分析比较后选用分光稳定较好的光纤分束器。最后,进行了瑞利多普勒激光雷达与探空气球的联合测风实验,实验结果表明两者风场分布吻合得较好。 Theoretical analysis shows that in the dual-edge Rayleigh-based wind lidar technique, the spectral accuracy of signal channels affects the accuracy of wind speed measurement. Therefore, the wind speed error calculation, the need to consider the splitting ratio error, and try to choose a good spectroscopic stability of the instrument. In LIDAR, fiber-optic beam splitters and beam splitting plates are often used for spectroscopy. The splitting beam splitting is affected by the depolarization effect of the atmosphere, and the splitting is unstable. However, the splitting ratio of the fiber splitting beam needs to be measured and there is a measurement error. It can be seen from the analysis that in the pure molecular scattering environment, the relative change of the light splitting sheet caused by the depolarization effect is 0.07% -0.63%; the average optical splitting ratio of the multimode optical fiber splitter measured by the experiment is 1.018 and the standard deviation is 0.4% Comparison of the better use of splitting optical fiber splitter. Finally, the joint wind-measurement experiment of Rayleigh-Doppler lidar and sounding balloon was carried out. The experimental results show that the distribution of the two wind fields is in good agreement.