利用激光雷达米氏(Mie)散射回波信号与转动拉曼(Raman)回波信号的差值，结合已知的大气分子消光系数，构造纯气溶胶回波用以反演气溶胶消光系数。假设气溶胶消光后向散射比在相邻高度上相近，即微分为零，根据纯气溶胶回波信号公式推导出反演大气气溶胶消光系数的积分公式。该方法利用转动Raman散射信号与气溶胶后向散射无关的特性去除Mie散射信号中大气分子后向散射部分，降低了大气分子数密度波动对反演结果的影响，用积分反演提高了结果的稳定性。最后用自行研制的转动拉曼米氏(Raman-Mie)散射激光雷达(RRML)回波信号对该方法进行验证，结果表明该方法能有效地反演气溶胶消光系数廓线。

Assuming atmospheric molecules extinction coefficient is known, a new method for retrieving aerosol extinction coefficient with pure aerosol echoes is proposed. The pure aerosol echoes are reconstructed with rotational Raman echoes and Mie echoes detected with a rotational Raman-Mie scattering lidar (RRML). Assuming the extinction backscattering ratio is an approximate constant, an integral formula for aerosol extinction coefficient inversion is derived. In the method, the Rayleigh backscattering signal included in the Mie echo is removed to reduce the impact of fluctuation of atmospheric molecules. Finally, the new method is applied to the RRML echo detectinon by the RRML developed by ourselves. The results showe that stable aerosol extinction coefficient profile could be retrieved effectively by using the new method.