Hausamann D, Davis B W
Appl Opt. 1990 Jul 1;29(19):2919-28. doi: 10.1364/AO.29.002919.
A simple method has been developed to determine the sign of the wind vector in a homodyne cw laser Doppler velocimeter (LDV). In contrast to the usual heterodyne technique-which requires the signal carrier frequency to be large compared to the signal frequency-this method makes use of a small additional frequency change which is superimposed onto either the signal or the local oscillator reference beam. Therefore, the sign of the wind signal Doppler shift can easily be determined and the ambiguity in wind direction-typical for homodyne systems-is removed. Some inconsistencies in earlier publications concerning vertical wind components are now explainable.
已开发出一种简单方法来确定零差连续波激光多普勒测速仪（LDV）中风矢量的方向。与通常的外差技术（要求信号载波频率远大于信号频率）不同，该方法利用叠加在信号或本地振荡器参考光束上的一个小的附加频率变化。因此，可以轻松确定风信号多普勒频移的方向，消除了零差系统中典型的风向模糊性。早期出版物中有关垂直风分量的一些不一致之处现在可以解释了。
