Investigation of a radial-mode-excited piezoelectric tube for photoacoustic gas sensing

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2025-03-25 DOI:10.1007/s00340-025-08456-5

Junfeng Zhou, Yukun Liao, Hui Zhang, Mengpeng Hu, Hongqiang Fan, Panpan Sun, Dongqing Zhang, Jinguang Lv, Jingqiu Liang, Qiang Wang

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Abstract

We report a piezoelectric (PZT) tube photoacoustic spectroscopy (PAS) gas sensing system, in which a PZT tube serves as both an acoustic resonator and a transducer. To suppress the external disturbance and fully use the internal surface of the PZT tube, we investigate the radial modes for PAS sensing. By exciting its 003-radial mode, the signal-to-noise ratio is more than one order of magnitude higher than that of its commonly used 100 longitudinal mode. We take water vapor as an example to demonstrate its sensing performance, achieving a minimum detection limit of 0.32 ppm, corresponding to a normalized noise equivalent absorption (NNEA) coefficient is 5 × 10^− 9 cm^− 1·W·Hz^− 1/2, and the R-square value of the concentration response fitting is 0.9998. A method to efficiently determine the resonant frequency is studied, which can effectively improve the stability of the sensor system when dealing with external disturbances. With a high acoustic coupling efficiency, simple structure and less disturbance by radial resonant mode, this proposed PZT-PAS technique would promote the PAS application for practical sensitive gas sensing.

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.