Abstract

2 μm solid-state lasers are the primary choice for coherent Doppler wind detection. As wind lidars, they are used for wake vortex and clear air turbulence detection providing air transport safety. In addition, 2 μm lasers are one of the candidates for CO₂ detection lidars. The rich CO₂ absorption line around 2 μm, combined with the long upper state lifetime, has made Ho based 2 μm lasers a viable candidate for CO₂ sensing DIAL instrument. As a transmitter for a coherent wind lidar, this laser has stringent spectral line width and beam quality requirements.

© 2007 IEEE