论述了用原子滤波器的透射率廓线测量激光多普勒频移的直接检测方法和理论。报道了基于这个方法的一个原理性实验。实验采用二极管泵浦的连续倍频Nd∶YAG激光器作为发射器,和一个温控的透射率翼宽为380MHz(相当于测速范围为0~50ms)的碘滤波器作为多普勒频移检测器件进行了转盘速度的测量。实验结果与已知转盘速度吻合得很好,速度精度为0.3 ms左右。实验同时,利用另一碘波波器及其电子学伺服系统把激光频率锁定在碘透射率中间,频率稳定度在±150 kHz以内。

The theory and method of measuring moving target′s velocity using atomic transmission are described. A diode pumped frequency doubling CW Nd∶YAG laser has been used to demonstrate the feasibility of the method. An iodine filter with wing width of 380 MHz is used in the experiment which represents a velocity range of 0～50 m/s. The laser frequency is locked on the center of the slope of transmission of another iodine filter. The experimental error as small as 30 cm/s is obtained. The result and experimental error are analyzed. This method can be applied to lidar for measuring the atmosphere wind.