A coherent Doppler lidar system was frequency stabilized in a master–slave configuration by a phase-modulation technique. The short-term frequency stability, ~0.2 MHz rms, was maintained in a vibrational environment on a ship during a field campaign in the tropical Pacific Ocean. The long-term frequency stability was <2.6 kHz/h. Thus, in many applications, shot-to-shot frequency correction can be disregarded, which will result in increased speed and simplicity of the data-acquisition system. A frequency chirp could not be detected. These properties permit Doppler wind measurements with high efficiency and duty cycles to be made, even on airborne and spaceborne platforms.
© 2000 Optical Society of America
V. Wulfmeyer, M. Randall, A. Brewer, and R. M. Hardesty, "2-µm Doppler lidar transmitter with high frequency stability and low chirp," Opt. Lett. 25, 1228-1230 (2000)