Octupole electrode pattern for tuning forks vibrating at the first overtone mode in quartz-enhanced photoacoustic spectroscopy

A. Elefante; P. Patimisco; A. Sampaolo; M. Giglio; G. Menduni; H. Rossmadl; V. Mackowiak; V. Passaro; Bruno Gross; Alex Cable; F. K. Tittel; V. Spagnolo

doi:10.1117/12.2507909

1 February 2019 Octupole electrode pattern for tuning forks vibrating at the first overtone mode in quartz-enhanced photoacoustic spectroscopy

A. Elefante, P. Patimisco, A. Sampaolo, M. Giglio, G. Menduni, H. Rossmadl, V. Mackowiak, V. Passaro, Bruno Gross, Alex Cable, F. K. Tittel, V. Spagnolo

Author Affiliations +

Proceedings Volume 10926, Quantum Sensing and Nano Electronics and Photonics XVI; 109262K (2019) https://doi.org/10.1117/12.2507909
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

We report on a comparison between two quartz tuning forks (QTFs) employed for quartz-enhanced photoacoustic spectroscopy (QEPAS) having quadrupole and octupole electrode pattern configurations. With respect to the quadrupole, the implementation of the octupole pattern suppresses the fundamental mode and reduces by a factor of ~ 4.4 the electrical resistance for the first overtone mode with negligible variations of the related Q-factors. Both QTFs operating at the first overtone mode were implemented in a QEPAS sensor and the results showed that the octupole configuration provides a ~2.3 signal enhancement factor.

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A. Elefante, P. Patimisco, A. Sampaolo, M. Giglio, G. Menduni, H. Rossmadl, V. Mackowiak, V. Passaro, Bruno Gross, Alex Cable, F. K. Tittel, and V. Spagnolo "Octupole electrode pattern for tuning forks vibrating at the first overtone mode in quartz-enhanced photoacoustic spectroscopy", Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI, 109262K (1 February 2019); https://doi.org/10.1117/12.2507909

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