Investigations on the performance of lidar measurements with different pulse shapes using a multi-channel Doppler lidar system

摘要

Pulse distortion during pulse amplification and the consequential influence on measurement results is a problem for low and high power pulsed lidar systems. We present a multi-channel coherent Doppler lidar system with automatic feedback control of pulse shapes and durations on each wavelength-channel allowing this system to send laser pulses simultaneously with individual pulse parameters into the atmosphere. The influence of different pulse shapes and durations on the lidar performance in terms of the resulting signal-to-noise ratio, Doppler spectrum width, and velocity precision in atmospheric measurements is investigated. A comparison of two main transmitted pulse shapes will be discussed: a GauB- and square-shaped pulse.