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Hollow-core fiber cavity-enhanced photothermal spectroscopy for oxygen detection

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Abstract

We report an all-fiber oxygen sensor based on cavity-enhanced photothermal spectroscopy at 761 nm. By using a 1-cm-long high-finesse Fabry-Perot cavity to amplify the detected photothermal signal, we demonstrated oxygen detection down to 6 ppm.

© 2022 The Author(s)

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