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Proceedings Paper

Development of DIAL for CO2 and CH4 in the atmosphere
Author(s): Michihiro Uchiumi; Nilesh J. Vasa; Makoto Fujiwara; Shigeru Yokoyama; Mitsuo Maeda; Osamu Uchino
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Paper Abstract

Development of a mid-infrared differential absorption LIDAR system around 2.0 and 2.3 tm wavelength is proposed for remote sensing of greenhouse-effect gases, such as CO2 and CH. A model calculation shows that the 1.6 to 2 ptm wavelength region is also suitable for the CO2 measurements. A widely tunable self—injection seeded Ti3: sapphire laser in combination with a Raman shifter is used for a tunable mid-infrared laser source. This combination could allow a wide tuning range between 1.6 and 2.3 .tm. The spectral width of the Ti3: sapphire laser was measured around 0.04 cnf 1 and stability of the laser source was also studied by a Fabry-Perot interferometer in order to determine theaccuracy of the DIAL measurement. Currently, output energy is limited to only a few mJ limiting the detection sensitivity. Nevertheless improved output characteristics should meet the requirements satisfactorily to monitor CO2 and CH gases in the atmosphere.

Paper Details

Date Published: 21 March 2003
PDF: 9 pages
Proc. SPIE 4893, Lidar Remote Sensing for Industry and Environment Monitoring III, (21 March 2003); doi: 10.1117/12.466107
Show Author Affiliations
Michihiro Uchiumi, Ariake National College of Technology (Japan)
Nilesh J. Vasa, Kyushu Univ. (Japan)
Makoto Fujiwara, Kyushu Univ. (Japan)
Shigeru Yokoyama, Kyushu Univ. (Japan)
Mitsuo Maeda, Kyushu Univ. (Japan)
Osamu Uchino, Japan Meteorological Agency (Japan)

Published in SPIE Proceedings Vol. 4893:
Lidar Remote Sensing for Industry and Environment Monitoring III
Upendra N. Singh; Toshikasu Itabe; Zhishen Liu, Editor(s)

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