All fiber pulsed coherent lidar development for wind profiles measurements in boundary layers

Abstract

An all fiber pulsed coherent Doppler lidar (CDL) system at 1.54 m wavelength is developed for wind profiles measurements. This lidar affords 43.0-J pulse energy at 10-kHz pulse repetition frequency with 500-ns pulse width. The lidar is operated in monostatic mode with 50-mm diameter telescope. The heterodyne mixing signals are acquired with 500 M/s analog to digital converter and 2048 points fast Fourier transform (FFT) is implemented. Line of sight wind speeds are measured with more than 3.0-km range in a horizontal direction and about 1.9 km in the vertical direction with 75-m range resolution. Systematic error of speed measurement of 0.2 m/s is validated.