The application of heterodyne lidar to observe molecular scattering is considered. Despite the reduced Rayleigh cross section, infrared systems are predicted to require mean power levels comparable with those of current and proposed direct detection lidars that operate with the thermally broadened spectra in the visible or ultraviolet. Rayleigh–Brillouin scattering in the kinetic and hydrodynamic (collisional) regimes encountered in the infrared is of particular interest because the observed spectrum approaches a triplet of relatively narrow lines that are more suitable for wind, temperature, and pressure measurements.
© 1998 Optical Society of America
(280.1310) Remote sensing and sensors : Atmospheric scattering
(280.3420) Remote sensing and sensors : Laser sensors
(280.3640) Remote sensing and sensors : Lidar
(290.5830) Scattering : Scattering, Brillouin
(290.5870) Scattering : Scattering, Rayleigh
Barry J. Rye, "Molecular Backscatter Heterodyne Lidar: A Computational Evaluation," Appl. Opt. 37, 6321-6328 (1998)