Helmholtz-resonator quartz-enhanced photoacoustic spectroscopy

被引：16

作者：

Luo, Huijian ^{[1
]}

Wang, Chenglong ^{[1
]}

Lin, Haoyang ^{[1
]}

Wu, Qian ^{[1
]}

Yang, Zhifei ^{[1
]}

Zhu, Wenguo ^{[1
]}

Zhong, Yongchun ^{[1
]}

Kan, Ruifeng ^{[2
]}

Yu, Jianhu ^{[1
]}

Zheng, Huadan ^{[1
]}

机构：

[1] Jinan Univ, Key Lab Optoelect Informat & Sensing Technol, Guangdong Higher Educ Inst, Guangzhou 510632, Peoples R China

[2] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China

来源：

OPTICS LETTERS | 2023年 / 48卷 / 07期

基金：

中国国家自然科学基金;

关键词：

GAS-DETECTION;

D O I：

10.1364/OL.481457

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, Helmholtz-resonator quartz-enhanced photoa-coustic spectroscopy (HR-QEPAS) was developed for trace gas sensing. A pair of Helmholtz resonators with high-order resonance frequency was designed and coupled with a quartz tuning fork (QTF). Detailed theoretical analysis and experi-mental research were carried out to optimize the HR-QEPAS performance. As a proof-of-concept experiment, the water vapor in the ambient air was detected using a 1.39 mu m near -infrared laser diode. Benefiting from the acoustic filtering of the Helmholtz resonance, the noise level of QEPAS was reduced by >30%, making the QEPAS sensor immune to environmental noise. In addition, the photoacoustic signal amplitude was improved significantly by >1 order of mag-nitude. As a result, the detection signal-to-noise ratio was enhanced by >20 times, compared with a bare QTF.(c) 2023 Optica Publishing Group

引用

页码：1678 / 1681

页数：4

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