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Y. TONG1, Y. F. MA1,*
A continuous trace gas concentration measurement using quartz-enhanced photoacoustic spectroscopy technique based on harmonic detection and LabVIEW program was demonstrated in this paper. The wavelength of the laser was locked at the absorption line peak with the help of the third harmonic signal. Using a 2.33 μm continuous wave, distributed feedback fiber-coupled diode laser, a long-term monitoring of carbon monoxide concentration for 85 s was performed to demonstrate reliable operation of the quartz-enhanced photoacoustic spectroscopy sensor..
Continuous gas concentration measurement, QEPAS, Harmonic detection, Absorption line locking.
Y. TONG, Y. F. MA, Continuous trace gas concentration measurement based on quartz-enhanced photoacoustic spectroscopy technique, Optoelectronics and Advanced Materials - Rapid Communications, 13, 1-2, January-February 2019, pp.51-55 (2019).
Submitted at: May 16, 2018
Accepted at: Feb. 12, 2019
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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