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介绍了一种光纤式激光多普勒横向传感器，被测位移和光束方向垂直。该系统采用双通道比相测量方法，消除了低频噪声并且直接得到相对位移量，可以测量从静态到２０ｋＨｚ的振动。文中给出了理论分析和实验结果。
A fiber laser Doppler transverse sensor is introduced. The measured displacement and the beam direction are vertical. The system uses a two-channel phase ratio measurement method, eliminating low-frequency noise and direct the relative displacement can be measured from static to 20kHz vibration. The paper gives the theoretical analysis and experimental results.