Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell

Yanzhen Tan; Wei Jin; Fan Yang; Yi Jiang; Hoi Lut Ho

doi:10.1109/JLT.2019.2922001

Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell

Yanzhen Tan, Wei Jin^*, Fan Yang, Yi Jiang, Hoi Lut Ho

^*Corresponding author for this work

School of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A photothermal (PT) gas sensor with a hollow-core photonic bandgap fiber (HC-PBF) Fabry-Perot absorption cell is demonstrated. The formation of a high finesse cavity enhances the pump intensity and hence PT phase modulation as well as the sensitivity of PT phase detection by a factor that is proportional to the cavity finesse. Experiments with a 6.2-cm long HC-PBF absorption cell with a finesse of 45 for the pump and 41 for the probe demonstrated detection of 100 part-per-million acetylene in nitrogen with a signal-to-noise ratio of 795 for a detection bandwidth of 0.031 Hz. The double-cavity-enhanced PT gas sensor allows the use of a shorter HC-PBF to develop highly sensitive and fast all-fiber gas sensors.

Original language	English
Article number	8734710
Pages (from-to)	4222-4228
Number of pages	7
Journal	Journal of Lightwave Technology
Volume	37
Issue number	17
DOIs	https://doi.org/10.1109/JLT.2019.2922001
Publication status	Published - 1 Sept 2019

Keywords

Cavity enhancement
gas sensor
optical fiber sensor
photonic crystal fiber
photothermal interferometry

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10.1109/JLT.2019.2922001

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title = "Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell",

abstract = "A photothermal (PT) gas sensor with a hollow-core photonic bandgap fiber (HC-PBF) Fabry-Perot absorption cell is demonstrated. The formation of a high finesse cavity enhances the pump intensity and hence PT phase modulation as well as the sensitivity of PT phase detection by a factor that is proportional to the cavity finesse. Experiments with a 6.2-cm long HC-PBF absorption cell with a finesse of 45 for the pump and 41 for the probe demonstrated detection of 100 part-per-million acetylene in nitrogen with a signal-to-noise ratio of 795 for a detection bandwidth of 0.031 Hz. The double-cavity-enhanced PT gas sensor allows the use of a shorter HC-PBF to develop highly sensitive and fast all-fiber gas sensors.",

keywords = "Cavity enhancement, gas sensor, optical fiber sensor, photonic crystal fiber, photothermal interferometry",

author = "Yanzhen Tan and Wei Jin and Fan Yang and Yi Jiang and Ho, {Hoi Lut}",

note = "Publisher Copyright: {\textcopyright} 1983-2012 IEEE.",

year = "2019",

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doi = "10.1109/JLT.2019.2922001",

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T1 - Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell

AU - Tan, Yanzhen

AU - Jin, Wei

AU - Yang, Fan

AU - Jiang, Yi

AU - Ho, Hoi Lut

PY - 2019/9/1

Y1 - 2019/9/1

N2 - A photothermal (PT) gas sensor with a hollow-core photonic bandgap fiber (HC-PBF) Fabry-Perot absorption cell is demonstrated. The formation of a high finesse cavity enhances the pump intensity and hence PT phase modulation as well as the sensitivity of PT phase detection by a factor that is proportional to the cavity finesse. Experiments with a 6.2-cm long HC-PBF absorption cell with a finesse of 45 for the pump and 41 for the probe demonstrated detection of 100 part-per-million acetylene in nitrogen with a signal-to-noise ratio of 795 for a detection bandwidth of 0.031 Hz. The double-cavity-enhanced PT gas sensor allows the use of a shorter HC-PBF to develop highly sensitive and fast all-fiber gas sensors.

AB - A photothermal (PT) gas sensor with a hollow-core photonic bandgap fiber (HC-PBF) Fabry-Perot absorption cell is demonstrated. The formation of a high finesse cavity enhances the pump intensity and hence PT phase modulation as well as the sensitivity of PT phase detection by a factor that is proportional to the cavity finesse. Experiments with a 6.2-cm long HC-PBF absorption cell with a finesse of 45 for the pump and 41 for the probe demonstrated detection of 100 part-per-million acetylene in nitrogen with a signal-to-noise ratio of 795 for a detection bandwidth of 0.031 Hz. The double-cavity-enhanced PT gas sensor allows the use of a shorter HC-PBF to develop highly sensitive and fast all-fiber gas sensors.

KW - Cavity enhancement

KW - gas sensor

KW - optical fiber sensor

KW - photonic crystal fiber

KW - photothermal interferometry

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JF - Journal of Lightwave Technology

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ER -

Cavity-Enhanced Photothermal Gas Detection with a Hollow Fiber Fabry-Perot Absorption Cell

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Keywords

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