A lidar instrument based on pulsed frequency-doubled carbon-dioxide lasers has been used at 4.88 µm for remote sensing of atmospheric carbon dioxide. A tunable-diode laser spectrometer provided the high-resolution spectroscopic data on carbon-dioxide line strength and line broadening needed for an accurate differential absorption measurement. Initial field measurements are presented, and instrument improvements necessary for accurate carbon dioxide measurement are discussed.
Jack L. Bufton, Toshikazu Itabe, L. Larrabee Strow, C. Laurence Korb, Bruce M. Gentry, and Chi Y. Weng, "Frequency-doubled CO2 lidar measurement and diode laser spectroscopy of atmospheric CO2," Appl. Opt. 22, 2592-2602 (1983)