We report on the design, realization, and performance of novel quartz tuning forks (QTFs) optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from a QTF geometry designed to provide a fundamental flexural in-plane vibrational mode resonance frequency of ~16 kHz, with a quality factor of 15,000 at atmospheric pressure, two novel geometries have been realized: a QTF with T-shaped prongs and a QTF with prongs having rectangular grooves carved on both surface sides. The QTF with grooves showed the lowest electrical resistance, while the T-shaped prongs QTF provided the best photoacoustic response in terms of signal-to-noise ratio (SNR). When acoustically coupled with a pair of micro-resonator tubes, the T-shaped QTF provides a SNR enhancement of a factor of 60 with respect to the bare QTF, which represents a record value for mid-infrared QEPAS sensing.

Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy / Patimisco, Pietro; Sampaolo, Angelo; Giglio, Marilena; dello Russo, Stefano; Mackowiak, Verena; Rossmadl, Hubert; Cable, Alex; Tittel, Frank K.; Spagnolo, Vincenzo. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 27:2(2019), pp. 1401-1415. [10.1364/OE.27.001401]

Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy

Pietro Patimisco;Angelo Sampaolo;Marilena Giglio;Vincenzo Spagnolo
2019-01-01

Abstract

We report on the design, realization, and performance of novel quartz tuning forks (QTFs) optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from a QTF geometry designed to provide a fundamental flexural in-plane vibrational mode resonance frequency of ~16 kHz, with a quality factor of 15,000 at atmospheric pressure, two novel geometries have been realized: a QTF with T-shaped prongs and a QTF with prongs having rectangular grooves carved on both surface sides. The QTF with grooves showed the lowest electrical resistance, while the T-shaped prongs QTF provided the best photoacoustic response in terms of signal-to-noise ratio (SNR). When acoustically coupled with a pair of micro-resonator tubes, the T-shaped QTF provides a SNR enhancement of a factor of 60 with respect to the bare QTF, which represents a record value for mid-infrared QEPAS sensing.
2019
Tuning forks with optimized geometries for quartz-enhanced photoacoustic spectroscopy / Patimisco, Pietro; Sampaolo, Angelo; Giglio, Marilena; dello Russo, Stefano; Mackowiak, Verena; Rossmadl, Hubert; Cable, Alex; Tittel, Frank K.; Spagnolo, Vincenzo. - In: OPTICS EXPRESS. - ISSN 1094-4087. - ELETTRONICO. - 27:2(2019), pp. 1401-1415. [10.1364/OE.27.001401]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/161114
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