Mode-phase-difference photothermal spectroscopy for gas detection with an anti-resonant hollow-core optical fiber

Pengcheng Zhao, Yan Zhao, Haihong Bao, Hoi Lut Ho, Wei Jin (), Shangchun Fan (), Shoufei Gao, Yingying Wang and Pu Wang
Additional contact information
Pengcheng Zhao: Beihang University
Yan Zhao: The Hong Kong Polytechnic University, Hung Hom
Haihong Bao: The Hong Kong Polytechnic University, Hung Hom
Hoi Lut Ho: The Hong Kong Polytechnic University, Hung Hom
Wei Jin: The Hong Kong Polytechnic University, Hung Hom
Shangchun Fan: Beihang University
Shoufei Gao: The Hong Kong Polytechnic University, Hung Hom
Yingying Wang: Beijing University of Technology
Pu Wang: Beijing University of Technology

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Laser spectroscopy outperforms electrochemical and semiconductor gas sensors in selectivity and environmental survivability. However, the performance of the state-of-the-art laser sensors is still insufficient for many high precision applications. Here, we report mode-phase-difference photothermal spectroscopy with a dual-mode anti-resonant hollow-core optical fiber and demonstrate all-fiber gas (acetylene) detection down to ppt (parts-per-trillion) and

Date: 2020
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DOI: 10.1038/s41467-020-14707-0

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