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.
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页数：7
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