A compact portable photoacoustic sensor for sub-ppm level SO2 detection with a DUV-LED and a non-resonant photoacoustic cell

Yujing Jing; Yujing Jing; Chaofan Feng; Chaofan Feng; Ruyue Cui; Ruyue Cui; Jiyu Xue; Jiyu Xue; Lei Dong; Lei Dong; Hongpeng Wu; Hongpeng Wu

doi:10.3389/fphy.2023.1328256

Frontiers in Physics (Dec 2023)

A compact portable photoacoustic sensor for sub-ppm level SO2 detection with a DUV-LED and a non-resonant photoacoustic cell

Yujing Jing,
Yujing Jing,
Chaofan Feng,
Chaofan Feng,
Ruyue Cui,
Ruyue Cui,
Jiyu Xue,
Jiyu Xue,
Lei Dong,
Lei Dong,
Hongpeng Wu,
Hongpeng Wu

Affiliations

Yujing Jing: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Yujing Jing: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
Chaofan Feng: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Chaofan Feng: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
Ruyue Cui: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Ruyue Cui: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
Jiyu Xue: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Jiyu Xue: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
Lei Dong: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Lei Dong: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China
Hongpeng Wu: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, China
Hongpeng Wu: Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China

DOI: https://doi.org/10.3389/fphy.2023.1328256
Journal volume & issue: Vol. 11

Abstract

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A photoacoustic module based on a novel 273 nm deep-ultraviolet light-emitting diode (DUV-LED) was developed for sulfur dioxide (SO2) detection. The DUV-LED with an emission angle of 60° emitted a power of 10 mW. A high-sensitivity non-resonant photoacoustic cell with a gas chamber volume of only 0.39 mL was introduced to reduce the thermal noise generated by the contact of scattered DUV light with the photoacoustic cell. Assembly of the DUV-LED with the non-resonant photoacoustic cell resulted in a robust and portable photoacoustic module without any moving parts. The minimum detection limit of 725 ppb was achieved with 1s integration time at room temperature and atmospheric pressure. Furthermore, the photoacoustic module performance was evaluated in terms of DUV modulation frequency, linearity and the long-term stability.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

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