A differential absorption lidar has been built to measure CO2 concentration in the atmosphere. The transmitter is a pulsed single-frequency Ho:Tm:YLF laser at a 2.05-μm wavelength. A coherent heterodyne receiver was used to achieve sensitive detection, with the additional capability for wind profiling by a Doppler technique. Signal processing includes an algorithm for power measurement of a heterodyne signal. Results show a precision of the CO2 concentration measurement of 1%-2% 1σ standard deviation over column lengths ranging from 1.2 to 2.8 km by an average of 1000 pulse pairs. A preliminary assessment of instrument sensitivity was made with an 8-h-long measurement set, along with correlative measurements with an in situ sensor, to determine that a CO2 trend could be detected. © 2004 Optical Society of America.
CITATION STYLE
Koch, G. J., Barnes, B. W., Petros, M., Beyon, J. Y., Amzajerdian, F., Yu, J., … Singh, U. N. (2004). Coherent differential absorption lidar measurements of CO2. Applied Optics, 43(26), 5092–5099. https://doi.org/10.1364/AO.43.005092
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