Optimizing the linewidth of Alexandrite lasers emitting in the IR or the UV for atmospheric lidars

As the effects of anthropogenic climate change grow, acquiring data on wind velocities and temperature distribution above 5 km is increasingly vital for atmospheric physics models. This is especially true for the middle atmosphere, between 10 km and 100 km, where data is limited and discrepancies between measurements and simulations persist. One effective approach involves using Doppler-Mie (aerosols), -Rayleigh (air molecules), and -resonance (metals) lidar systems within a single general-purpose system. For such multi-purpose Doppler lidars operating at metal resonances like potassium (770 nm) and iron (386 nm), lasers with a linewidth as narrow as possible are advantageous for higher resolution and sensitivity [1].