Potassium Doppler-Resonance Lidar . ... The diode laser is frequency modulated by a dual-pass acousto- optic modulation setup developed by the lidar group at Colorado State University in order to get the spectral information necessary to measure potassium temperature in the mesopause. ... The laser output is wavelength locked using a pulsed wavemeter and software developed at the Arecibo Observatory in order to feed back to the dye laser's rotating grating. ... Back to the Lidar Home Page . ...