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Conferences > OFS > 2022 > Th3 > Th3.5

Microfiber evanescent-wave photothermal methane sensor with sub-ppm sensitivity

Pengcheng Zhao, Shangchun Fan, Hoi Lut Ho, and Wei Jin

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Abstract

We report microfiber evanescent-wave photothermal spectroscopy for trace gas detection. With a 2-cm-long silica microfiber, detection limit of 440 ppb methane is achieved with dynamic range of nearly six orders of magnitude and response time of less than 7 seconds.

© 2022 The Author(s)

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