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  • Vol. 37, Iss. 13 — Jul. 1, 2012
  • pp: 2688–2690

Laser absorption spectrometer using frequency chirped intensity modulation at 1.57 μm wavelength for CO2 measurement

Masaharu Imaki, Shumpei Kameyama, Yoshihito Hirano, Shinichi Ueno, Daisuke Sakaizawa, Shuji Kawakami, and Masakatsu Nakajima  »View Author Affiliations


Optics Letters, Vol. 37, Issue 13, pp. 2688-2690 (2012)
http://dx.doi.org/10.1364/OL.37.002688


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Abstract

We have demonstrated the laser-absorption spectrometer system using frequency chirped intensity modulation at 1.57 μm wavelength for measurement of CO2 concentration. Using this technique, backscattered laser radiation from different ranges can be discriminated in the frequency domain of the electrical signal. We have reported the discrimination of two signals from the targets with different ranges. It is shown that stable measurements with short time fluctuation corresponding to 4 ppm (rms) were obtained with 32 s measurement intervals. Furthermore, there is qualitative good agreement on, at least, the diurnal changes between the results of the laser absorption spectrometer system and the in-situCO2 sensor.

© 2012 Optical Society of America

OCIS Codes
(010.3640) Atmospheric and oceanic optics : Lidar
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: April 17, 2012
Manuscript Accepted: May 3, 2012
Published: June 26, 2012

Citation
Masaharu Imaki, Shumpei Kameyama, Yoshihito Hirano, Shinichi Ueno, Daisuke Sakaizawa, Shuji Kawakami, and Masakatsu Nakajima, "Laser absorption spectrometer using frequency chirped intensity modulation at 1.57 μm wavelength for CO2 measurement," Opt. Lett. 37, 2688-2690 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2688


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