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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０～５０ｍ／ｓ）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０．３ｍ／ｓ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±１５０ｋＨｚ以内。
The direct detection method and theory of laser Doppler shift measured by the transmittance profile of atomic filter are discussed. A basic experiment based on this method is reported. A diode-pumped continuous-frequency Nd: YAG laser was used as the emitter and a temperature-controlled iodine filter with a wing width of 380 MHz (corresponding to a velocity range of 0-50 m / s) was used as the Doppler shift The test device performed the measurement of the carousel speed. The experimental results are in good agreement with the known turntable speeds and the speed accuracy is about 0.3m / s. At the same time, another iodine wave filter and its electronic servo system were used to lock the laser frequency in the middle of iodine transmittance with the frequency stability within ± 150kHz.