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Conferences > OFS > 2023 > Th6 > Th6.44

Low-coherence photothermal interferometry for ultra-sensitive gas sensing with remarkable stability

Yingzhen Hong, Haihong Bao, Feifan Chen, Shoulin Jiang, Kaiyuan Zheng, Shuangxiang Zhao, Hoi Lut Ho, Shoufei Gao, Yingying Wang, and Wei Jin

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Abstract

We demonstrate ultra-sensitive gas detection with remarkable long-term stability using low-coherence photothermal interferometry. With a 10-cm-long hollow-core fiber, we achieve sub-ppb level acetylene detection with stability of ±0.038%, which outperforms the state-of-the-art fiber gas sensors.

© 2023 The Author(s)

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