Abstract
Quartz crystal tuning fork (QCTF) as a sensitive element and valuable component has been widely used for developing mass and stress sensor, pressure and temperature sensor, optoacoustic transducer and photoelectric detector, due to its high quality factor, high stability and precision, and low power consumption. In this paper, QCTF was reported for simultaneous detection of both acoustic signal induced by photoacoustic effect (i.e. photoacoustic spectroscopy) and light signal from molecular absorption process (i.e. direct absorption spectroscopy). A broadband tunable external cavity quantum cascade laser (ECQCL) and two QCTFs with same resonant frequency was demonstrated for dual-spectroscopy technique detection of gas concentration. The results indicated that the proposed dual-spectroscopy technique can be efficiently utilized to enhance sensitivity of QCTF based gas sensors. Comparing to the common QEPAS technique, a sensitivity enhancement of 4–7 times was obtained for the proposed dual-spectroscopy technique.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
