Comparison between interferometric and piezoelectric readout of tuning fork vibrations in quartz-enhanced photoacoustic spectroscopy

P. Patimisco, Sheng Zhou, S. Dello Russo, A. Zifarelli, A. Sampaolo, M. Giglio, H. Rossmadl, V. Mackowiak, Alex Cable, D. Iannuzzi, V. Spagnolo

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Abstract

We report on a comparison between the piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) when employed as sound wave transducers in quartz-enhanced photoacoustic trace gas sensors. We demonstrate the possibility to properly design the QTF geometry to enhance interferometric readout signal with respect to the piezoelectric one and vice versa. When resonator tubes are acoustically coupled with the QTFs, signal-to-noise ratio enhancements are observed for both readout approaches. These results open the way to the implementation of optical readout of QTF vibrations in applications where external electromagnetic field could distort the piezoelectric signal.

Original languageEnglish
Title of host publicationProceedings of SPIE, Novel In-Plane Semiconductor Lasers XIX
EditorsAlexey A. Belyanin, Peter M. Smowton
Place of PublicationWashington, DC
PublisherSPIE
ISBN (Electronic)9781510633667
ISBN (Print)9781510633650
DOIs
Publication statusPublished - 2020
EventNovel In-Plane Semiconductor Lasers XIX 2020 - San Francisco, United States
Duration: 3 Feb 20206 Feb 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11301
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceNovel In-Plane Semiconductor Lasers XIX 2020
CountryUnited States
CitySan Francisco
Period3/02/206/02/20

Keywords

  • Gas sensing
  • Interferometry
  • Quartz-enhanced photoacoustic spectroscopy
  • Tuning fork

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