Monolithic Double Resonator for Quartz Enhanced Photoacoustic Spectroscopy

Roman Rousseau (1, 2) , Diba Ayache (1, 2) , Nicolas Maurin (1, 2) , Wioletta Trzpil (1, 2) , Michaël Bahriz (1, 2) , Aurore Vicet (1, 2)

1 IES - Institut d’Electronique et des Systèmes
2 NANOMIR - Composants à Nanostructure pour le moyen infrarouge

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.

Mots clés: photoacoustics; infrared; laser; sensing; QEPAS

Domaines: Instrumentations et Détecteurs [physics.ins-det]

Roman Rousseau, Diba Ayache, Nicolas Maurin, Wioletta Trzpil, Michaël Bahriz, et al.. Monolithic Double Resonator for Quartz Enhanced Photoacoustic Spectroscopy. Applied Sciences, 2021, 11 (5), pp.2094. ⟨10.3390/app11052094⟩. ⟨hal-03260067⟩