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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 SO2 using multiwavelength curve fitting. With this method we use five wavelengths around a SO2 absorption peak and obtain SO2 and O3 concentrations by fitting their absorption cross sections to measured DIAL and null results. A SO2 concentration of 6 parts in 109 (ppb) was obtained for an altitude of 1050 m with 150-m range resolution. In addition, we optimized the wavelengths for dual-DIAL SO2 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

Original Manuscript: March 5, 2001
Revised Manuscript: July 30, 2001
Published: January 20, 2002

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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