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

Paper Details

Date Published: 1 February 2019
PDF: 8 pages
Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI, 109262K (1 February 2019); doi: 10.1117/12.2507909
Show Author Affiliations
A. Elefante, Politecnico di Bari (Italy)
P. Patimisco, Politecnico di Bari (Italy)
A. Sampaolo, Politecnico di Bari (Italy)
M. Giglio, Politecnico di Bari (Italy)
G. Menduni, Politecnico di Bari (Italy)
Politecnico di Bari (Italy)
H. Rossmadl, Thorlabs GmbH (Germany)
V. Mackowiak, Thorlabs GmbH (Germany)
V. Passaro, Politecnico di Bari (Italy)
Bruno Gross, Thorlabs, Inc. (United States)
Alex Cable, Thorlabs, Inc. (United States)
F. K. Tittel, Rice Univ. (United States)
V. Spagnolo, Politecnico di Bari (Italy)

Published in SPIE Proceedings Vol. 10926:
Quantum Sensing and Nano Electronics and Photonics XVI
Manijeh Razeghi; Jay S. Lewis; Eric Tournié; Giti A. Khodaparast, Editor(s)

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