All-fiber coherent Doppler lidar

The paper sums up the principles of construction of all-fiber Doppler coherent wind lidars, which can be divided into two classes by the method of signal conversion: homodyne and heterodyne. Lidars of the first class, usually, with continuous-wave probing radiation employ the direct conversion of the signal, when the carrier frequency coincides with the master oscillator frequency. Systems of the second class are pulsed Doppler lidars with the carrier frequency shifted about the master oscillator frequency, which allows simultaneous measurements of the direction and speed of the radial wind. Now our laboratory has started the works to make a prototype model of the pulsed all-fiber coherent Doppler lidar.