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Conferences > OFS > 2022 > F2 > F2.3

Sensitivity enhancement of photothermal gas detection via optical phase-modulation amplification

Yingzhen Hong, Feifan Chen, Haihong Bao, Shoufei Gao, Hoi Lut Ho, Yingying Wang, and Wei Jin

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Abstract

We report an optical phase-modulation amplifier for enhancing the sensitivity of photothermal spectroscopic sensors. An amplification factor of nearly 20 is achieved, which enables sub-ppb level carbon dioxide detection with a 0.5-m-long hollow-core fiber.

© 2022 The Author(s)

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