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Doppler lidar is an important means of atmospheric wind field detection, In this paper, based on fiber optic Mach Zehnder interferometer as lidar system frequency discriminator, complete simulation of lidar wind speed from the school formal experiment system design, adjustable speed turntable uses as a simulation wind velocity generating means and completed the experimental system set up. Initial utilization the seed laser wavelength can be adjusted to achieve the system output intensity variation, experimental analysis of results show that the frequency discriminator system reliability and further realize the optical path difference discriminator system accurate correction.