Monolithic Double Resonator for Quartz Enhanced Photoacoustic Spectroscopy
Open Access
- 26 February 2021
- journal article
- research article
- Published by MDPI AG in Applied Sciences
- Vol. 11 (5), 2094
- https://doi.org/10.3390/app11052094
Abstract
A new approach for Quartz Enhanced Photoacoustic Spectroscopy is presented, based on an acoustic excitation from the outside of the prongs of a quartz tuning fork, to increase the sensitivity of the sensor. For this purpose, we introduce a monolithic acoustic double-resonator (double-mR) in a T-shape configuration, using 3D printing. It was modelized and experimentally characterized using a 1392 nm distributed feedback laser diode, targeting a water vapor absorption line. The setup showed a two-factor enhancement of the signal, compared to a classical off-beam QEPAS approach and confirmed the strong interest of photolithographic printing techniques for acoustic developments.Keywords
Funding Information
- Agence Nationale de la Recherche (ANR-16-CE04-0012, ANR-11-EQPX-0016, ANR-16-IDEX-0006)
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