Ultra-Compact Optical Fiber Gas Sensor with High Sensitivity, Fast Response and Large Dynamic Range

Linhao Guo; Haihong Bao; Feifan Chen; Pengcheng Zhao; Shoulin Jiang; Hoi Lut Ho; Wei Jin

doi:10.1109/JLT.2023.3337411

Ultra-Compact Optical Fiber Gas Sensor with High Sensitivity, Fast Response and Large Dynamic Range

Linhao Guo, Haihong Bao, Feifan Chen, Pengcheng Zhao, Shoulin Jiang, Hoi Lut Ho, Wei Jin

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

We report a miniature optical fiber photothermal (PT) gas sensor with high sensitivity, fast response and large dynamic range. The sensing region is an air gap formed between the cleaved ends of two single mode fibers (SMFs). Theoretical formulations of photothermal phase modulation and interferometric phase detection are presented. Numerical simulation and experimental investigation are carried out to optimize the system parameters to maximize the photothermal signal. A gas sensor with an air gap of 130 μm demonstrates a noise equivalent concentration of 45 parts per billion and dynamic range of 2 × 10⁷ for acetylene detection, with a response time of 0.9 s. The sensor is simple to construct and may be used for real-time gas detection in a confined space.

Original language	English
Article number	10333340
Pages (from-to)	1-8
Number of pages	8
Journal	Journal of Lightwave Technology
DOIs	https://doi.org/10.1109/JLT.2023.3337411
Publication status	Published - Nov 2023

Keywords

Air gaps
Gas detectors
gas sensor
laser absorption spectroscopy
Laser excitation
optical fiber sensor
Optical fiber sensors
Phase modulation
Photothermal spectroscopy
Probes
real-time detection
Sensitivity

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

More information

10.1109/JLT.2023.3337411

Cite this

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title = "Ultra-Compact Optical Fiber Gas Sensor with High Sensitivity, Fast Response and Large Dynamic Range",

abstract = "We report a miniature optical fiber photothermal (PT) gas sensor with high sensitivity, fast response and large dynamic range. The sensing region is an air gap formed between the cleaved ends of two single mode fibers (SMFs). Theoretical formulations of photothermal phase modulation and interferometric phase detection are presented. Numerical simulation and experimental investigation are carried out to optimize the system parameters to maximize the photothermal signal. A gas sensor with an air gap of 130 μm demonstrates a noise equivalent concentration of 45 parts per billion and dynamic range of 2 × 107 for acetylene detection, with a response time of 0.9 s. The sensor is simple to construct and may be used for real-time gas detection in a confined space.",

keywords = "Air gaps, Gas detectors, gas sensor, laser absorption spectroscopy, Laser excitation, optical fiber sensor, Optical fiber sensors, Phase modulation, Photothermal spectroscopy, Probes, real-time detection, Sensitivity",

author = "Linhao Guo and Haihong Bao and Feifan Chen and Pengcheng Zhao and Shoulin Jiang and Ho, {Hoi Lut} and Wei Jin",

note = "Publisher Copyright: IEEE",

year = "2023",

month = nov,

doi = "10.1109/JLT.2023.3337411",

language = "English",

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journal = "Journal of Lightwave Technology",

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AU - Guo, Linhao

AU - Bao, Haihong

AU - Chen, Feifan

AU - Zhao, Pengcheng

AU - Jiang, Shoulin

AU - Ho, Hoi Lut

AU - Jin, Wei

N1 - Publisher Copyright: IEEE

PY - 2023/11

Y1 - 2023/11

N2 - We report a miniature optical fiber photothermal (PT) gas sensor with high sensitivity, fast response and large dynamic range. The sensing region is an air gap formed between the cleaved ends of two single mode fibers (SMFs). Theoretical formulations of photothermal phase modulation and interferometric phase detection are presented. Numerical simulation and experimental investigation are carried out to optimize the system parameters to maximize the photothermal signal. A gas sensor with an air gap of 130 μm demonstrates a noise equivalent concentration of 45 parts per billion and dynamic range of 2 × 107 for acetylene detection, with a response time of 0.9 s. The sensor is simple to construct and may be used for real-time gas detection in a confined space.

AB - We report a miniature optical fiber photothermal (PT) gas sensor with high sensitivity, fast response and large dynamic range. The sensing region is an air gap formed between the cleaved ends of two single mode fibers (SMFs). Theoretical formulations of photothermal phase modulation and interferometric phase detection are presented. Numerical simulation and experimental investigation are carried out to optimize the system parameters to maximize the photothermal signal. A gas sensor with an air gap of 130 μm demonstrates a noise equivalent concentration of 45 parts per billion and dynamic range of 2 × 107 for acetylene detection, with a response time of 0.9 s. The sensor is simple to construct and may be used for real-time gas detection in a confined space.

KW - Air gaps

KW - Gas detectors

KW - gas sensor

KW - laser absorption spectroscopy

KW - Laser excitation

KW - optical fiber sensor

KW - Optical fiber sensors

KW - Phase modulation

KW - Photothermal spectroscopy

KW - Probes

KW - real-time detection

KW - Sensitivity

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DO - 10.1109/JLT.2023.3337411

M3 - Journal article

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SP - 1

EP - 8

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

M1 - 10333340

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Ultra-Compact Optical Fiber Gas Sensor with High Sensitivity, Fast Response and Large Dynamic Range

Abstract

Keywords

ASJC Scopus subject areas

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