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Conferences > OFS > 2022 > W3 > W3.4

Mid-infrared reflective mode-phase-difference photothermal spectroscopy for methane detection in a hollow-core fiber

Feifan Chen, Shoulin Jiang, Shoufei Gao, Yingying Wang, Hoi Lut Ho, and Wei Jin

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Abstract

We demonstrate a methane sensor based on reflective mode-phase-difference photothermal spectroscopy. With a 1.8-m-long anti-resonant hollow-core fiber and a 3.27 μm pump laser, a noise-equivalent concentration of 44 ppt is achieved with 800 s integration time.

© 2022 The Author(s)

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