Sensors 2010, 10(5), 4686-4699; doi:10.3390/s100504686
Article

Diode Laser Detection of Greenhouse Gases in the Near-Infrared Region by Wavelength Modulation Spectroscopy: Pressure Dependence of the Detection Sensitivity

Received: 27 January 2010; in revised form: 13 April 2010 / Accepted: 16 April 2010 / Published: 6 May 2010
(This article belongs to the Special Issue Laser Spectroscopy and Sensing)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We have investigated the pressure dependence of the detection sensitivity of CO2, N2O and CH4 using wavelength modulation spectroscopy (WMS) with distributed feed-back diode lasers in the near infrared region. The spectral line shapes and the background noise of the second harmonics (2f) detection of the WMS were analyzed theoretically. We determined the optimum pressure conditions in the detection of CO2, N2O and CH4, by taking into consideration the background noise in the WMS. At the optimum total pressure for the detection of CO2, N2O and CH4, the limits of detection in the present system were determined.
Keywords: gas sensing; wavelength modulation spectroscopy; near-infrared absorption spectroscopy
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MDPI and ACS Style

Asakawa, T.; Kanno, N.; Tonokura, K. Diode Laser Detection of Greenhouse Gases in the Near-Infrared Region by Wavelength Modulation Spectroscopy: Pressure Dependence of the Detection Sensitivity. Sensors 2010, 10, 4686-4699.

AMA Style

Asakawa T, Kanno N, Tonokura K. Diode Laser Detection of Greenhouse Gases in the Near-Infrared Region by Wavelength Modulation Spectroscopy: Pressure Dependence of the Detection Sensitivity. Sensors. 2010; 10(5):4686-4699.

Chicago/Turabian Style

Asakawa, Takashi; Kanno, Nozomu; Tonokura, Kenichi. 2010. "Diode Laser Detection of Greenhouse Gases in the Near-Infrared Region by Wavelength Modulation Spectroscopy: Pressure Dependence of the Detection Sensitivity." Sensors 10, no. 5: 4686-4699.

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