MINI REVIEW article
Front. Phys.
Sec. Optics and Photonics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1709349
This article is part of the Research TopicAcquisition and Application of Multimodal Sensing Information, Volume IIIView all 4 articles
Study on Research Progress of Quartz-Enhanced Photoacoustic Spectroscopy for Trace Gas Detection
Provisionally accepted
- Hebei University of Technology, Beichen District, China
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Real-time detection of trace gas concentrations has a wide range of applications in industrial processes and monitoring and various complex environments. Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) features high sensitivity and selectivity for the detection of single or multiple gases. It is immune to environmental noise and also boasts advantages such as miniaturization capability, ease of integration, and low cost. However, this technology also faces challenges such as limited laser source performance and the need to optimize quartz tuning fork (QTF) structural parameters. This paper reviews the current research progress in QEPAS, elaborating on its fundamental principle as well as the contributions from both laser source improvements (e.g., power, tuning range, and size) and QTF optimization (e.g., frequency, structure, and coating) to enhanced sensitivity. In addition, this paper systematically evaluates current research on auxiliary enhancement strategies, including relaxant selection, optical path and waveguide optimization, and dual-spectrum fusion. Finally, it summarizes existing technologies and proposes future prospects based on current technical bottlenecks.
Keywords: Trace gas, Quartz-enhanced photoacoustic spectroscopy, Laser source, Quartz tuning fork, Gas detection
Received: 20 Sep 2025; Accepted: 17 Oct 2025.
Copyright: © 2025 Chang, Wang, Li, Yu, WANG and Lu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Gong Wang, wanggong@hebut.edu.cn
Yun-Fei Li, yfli@hebut.edu.cn
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