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Proceedings Paper

Development of 1.6 micron CW modulation ground-based DIAL system for CO2 monitoring
Author(s): Shumpei Kameyama; Masaharu Imaki; Yoshihito Hirano; Shinichi Ueno; Shuji Kawakami; Masakatsu Nakajima
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Paper Abstract

We have demonstrated the 1.6 micron CW modulation hard-target DIfferential Absorption Lidar (DIAL) system for CO2 sensing. In this system, ON and OFF wavelength laser lights are intensity modulated with CW modulation signal. Received lights of the two wavelengths from the hard-target are discriminated by modulation frequencies in electrical signal domain. Since the optical circuit is fiber-based, the system is compact, flexible, and reliable. It is shown that stable CO2 concentration measurement corresponding to 4 ppm(rms) can be realized in the measurement time of 32s. This measurement stability is better than those obtained by the conventional CO2 sensing DIAL systems in the same measurement time. And the diurnal change of the measured results is in good agreement with the ones measured by an in-situ CO2 meter.

Paper Details

Date Published: 9 December 2008
PDF: 8 pages
Proc. SPIE 7153, Lidar Remote Sensing for Environmental Monitoring IX, 71530L (9 December 2008); doi: 10.1117/12.804712
Show Author Affiliations
Shumpei Kameyama, Mitsubishi Electric Corp. (Japan)
Masaharu Imaki, Mitsubishi Electric Corp. (Japan)
Yoshihito Hirano, Mitsubishi Electric Corp. (Japan)
Shinichi Ueno, Mitsubishi Electric Corp. (Japan)
Shuji Kawakami, Japan Aerospace Exploration Agency (Japan)
Masakatsu Nakajima, Japan Aerospace Exploration Agency (Japan)

Published in SPIE Proceedings Vol. 7153:
Lidar Remote Sensing for Environmental Monitoring IX
Upendra N. Singh; Kazuhiro Asai; Achuthan Jayaraman, Editor(s)

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