Development of DIAL for CO2 and CH4  in the atmosphere

Michihiro Uchiumi; Nilesh J. Vasa; Makoto Fujiwara; Shigeru Yokoyama; Mitsuo Maeda; Osamu Uchino

doi:10.1117/12.466107

21 March 2003 Development of DIAL for CO₂ and CH₄ in the atmosphere

Michihiro Uchiumi, Nilesh J. Vasa, Makoto Fujiwara, Shigeru Yokoyama, Mitsuo Maeda, Osamu Uchino

Proceedings Volume 4893, Lidar Remote Sensing for Industry and Environment Monitoring III; (2003) https://doi.org/10.1117/12.466107
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

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.

Citation Download Citation

Michihiro Uchiumi, Nilesh J. Vasa, Makoto Fujiwara, Shigeru Yokoyama, Mitsuo Maeda, and Osamu Uchino "Development of DIAL for CO₂ and CH₄ in the atmosphere", Proc. SPIE 4893, Lidar Remote Sensing for Industry and Environment Monitoring III, (21 March 2003); https://doi.org/10.1117/12.466107

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