Photoacoustic spectroscopy for gas sensing: A comparison between piezoelectric and interferometric readout in custom quartz tuning forks

被引：27

作者：

Dello Russo, Stefano ^{[1
,2
]}

Zhou, Sheng ^{[3
]}

Zifarelli, Andrea ^{[1
,2
]}

Patimisco, Pietro ^{[1
,2
]}

Sampaolo, Angelo ^{[1
,2
]}

Giglio, Marilena ^{[1
,2
]}

Iannuzzi, Davide ^{[3
]}

Spagnolo, Vincenzo ^{[1
,2
]}

机构：

[1] Univ & Politecn Bari, Dipartimento Interateneo Fis, PolySense Lab, Via Amendola 173, Bari, Italy

[2] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China

[3] Vrije Univ Amsterdam, Dept Phys & Astron, Amsterdam, Netherlands

来源：

PHOTOACOUSTICS | 2020年 / 17卷

基金：

欧洲研究理事会;

关键词：

Photoacoustic spectroscopy; Tuning fork; Piezoelectricity; Interferometry; Gas sensing;

D O I：

10.1016/j.pacs.2019.100155

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We report on a comparison between piezoelectric and interferometric readouts of vibrations in quartz tuning forks (QTFs) when acting as sound wave transducers in a quartz-enhanced photoacoustic setup (QEPAS) for trace gas detection. A theoretical model relating the prong vibration amplitude with the QTF prong sizes and electrical resistance is proposed. To compare interferometric and piezoelectric readouts, two QTFs have been selected; a tuning fork with rectangular-shape of the prongs, having a resonance frequency of 3.4 kHz and a quality-factor of 4,000, and a QTF with prong having a T-shape characterized by a resonance frequency of 12.4 kHz with a quality-factor of 15,000. Comparison between the interferometric and piezoelectric readouts were performed by using both QTFs in a QEPAS sensor setup for water vapor detection. We demonstrated that the QTF geometry can be properly designed to enhance the signal from a specific readout mode.

引用

页数：7

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