Paper
9 December 2008 Development of 1.6 micron CW modulation ground-based DIAL system for CO2 monitoring
Author Affiliations +
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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Carbon dioxide

Modulation

Absorption

Sensing systems

Sensors

Time metrology

Modulators

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