Multi-mechanism enhanced photoacoustic spectroscopy H2S analyzer based on ultrasensitive fiber-optic acoustic sensor

Min Guo; Ke Chen; Xinyu Zhao; Guangyin Zhang; Chenxi Li; Zhenfeng Gong; Qingxu Yu

doi:10.1117/12.2668785

21 March 2023 Multi-mechanism enhanced photoacoustic spectroscopy H₂S analyzer based on ultrasensitive fiber-optic acoustic sensor

Min Guo, Ke Chen, Xinyu Zhao, Guangyin Zhang, Chenxi Li, Zhenfeng Gong, Qingxu Yu

Author Affiliations +

Proceedings Volume 12595, Advanced Fiber Laser Conference (AFL2022); 125951O (2023) https://doi.org/10.1117/12.2668785
Event: Advanced Fiber Laser Conference (AFL2022), 2022, Changsha, China

Abstract

To realize the highly sensitive detection of trace H₂S in SF₆, a multi-Mechanism Enhanced Photoacoustic Spectroscopy Analyzer (MEPSA) is proposed. A resonant Photoacoustic Cell (PAC) is used to enhance the photoacoustic signals. An ultrasensitive optical fiber acoustic sensor based on a silicon cantilever beam is used for mechanical resonance enhancement of photoacoustic signals. An Erbium-Doped Fiber Application amplifier (EDFA) was used to cascade a DFB to increase the excitation light power. The noise equivalent minimum detection limit of H₂S under the SF₆ background is 0.15 ppm.

Citation Download Citation

Min Guo, Ke Chen, Xinyu Zhao, Guangyin Zhang, Chenxi Li, Zhenfeng Gong, and Qingxu Yu "Multi-mechanism enhanced photoacoustic spectroscopy H₂S analyzer based on ultrasensitive fiber-optic acoustic sensor", Proc. SPIE 12595, Advanced Fiber Laser Conference (AFL2022), 125951O (21 March 2023); https://doi.org/10.1117/12.2668785

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