Development of 1.6 micron CW modulation ground-based DIAL system for CO2 monitoring

Shumpei Kameyama; Masaharu Imaki; Yoshihito Hirano; Shinichi Ueno; Shuji Kawakami; Masakatsu Nakajima

doi:10.1117/12.804712

9 December 2008 Development of 1.6 micron CW modulation ground-based DIAL system for CO₂ monitoring

Shumpei Kameyama, Masaharu Imaki, Yoshihito Hirano, Shinichi Ueno, Shuji Kawakami, Masakatsu Nakajima

Proceedings Volume 7153, Lidar Remote Sensing for Environmental Monitoring IX; 71530L (2008) https://doi.org/10.1117/12.804712
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

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.

Citation Download Citation

Shumpei Kameyama, Masaharu Imaki, Yoshihito Hirano, Shinichi Ueno, Shuji Kawakami, and Masakatsu Nakajima "Development of 1.6 micron CW modulation ground-based DIAL system for CO₂ monitoring", Proc. SPIE 7153, Lidar Remote Sensing for Environmental Monitoring IX, 71530L (9 December 2008); https://doi.org/10.1117/12.804712

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