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Applied Optics

Applied Optics


  • Vol. 41, Iss. 3 — Jan. 20, 2002
  • pp: 524–531

Trace Atmospheric SO2 Measurement by Multiwavelength Curve-Fitting and Wavelength-Optimized Dual Differential Absorption Lidar

Takashi Fujii, Tetsuo Fukuchi, Nianwen Cao, Koshichi Nemoto, and Nobuo Takeuchi  »View Author Affiliations

Applied Optics, Vol. 41, Issue 3, pp. 524-531 (2002)

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We present a new differential absorption lidar (DIAL) method for atmospheric trace SO<sub>2</sub> using multiwavelength curve fitting. With this method we use five wavelengths around a SO<sub>2</sub> absorption peak and obtain SO<sub>2</sub> and O<sub>3</sub> concentrations by fitting their absorption cross sections to measured DIAL and null results. A SO<sub>2</sub> concentration of 6 parts in 10<sup>9</sup> (ppb) was obtained for an altitude of 1050 m with 150-m range resolution. In addition, we optimized the wavelengths for dual-DIAL SO<sub>2</sub> measurement and demonstrated a high sensitivity of <0.5 ppb with 300-m range resolution. Comparison of these two methods is also presented.

© 2002 Optical Society of America

OCIS Codes
(000.2190) General : Experimental physics
(010.7030) Atmospheric and oceanic optics : Troposphere
(140.2050) Lasers and laser optics : Dye lasers
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(280.3640) Remote sensing and sensors : Lidar

Takashi Fujii, Tetsuo Fukuchi, Nianwen Cao, Koshichi Nemoto, and Nobuo Takeuchi, "Trace Atmospheric SO2 Measurement by Multiwavelength Curve-Fitting and Wavelength-Optimized Dual Differential Absorption Lidar," Appl. Opt. 41, 524-531 (2002)

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