In-fiber modal interferometer for high sensitivity gas detection

Fan Yang; Wei Jin

doi:10.1117/12.2194864

In-fiber modal interferometer for high sensitivity gas detection

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

1 Citation (Scopus)

Abstract

We demonstrate a gas sensor based on mode interference in a hollow-core photonic bandgap fiber. Gas absorption of a pump laser beam induces phase modulation of a propagating probe beam, which is detected by use of an in-fiber modal interferometer. An estimated detection limit of 2 ppm acetylene (7x10-5 in terms of noise equivalent absorbance or NEA) is achieved with 30-cm-long HC-PBF operating at the near infrared wavelength. This NEA is 22 times better than state-of-the-art HC-PBF gas sensors based on direct absorption spectroscopy.

Original language	English
Title of host publication	24th International Conference on Optical Fibre Sensors, OFS 2015
Publisher	SPIE
Volume	9634
ISBN (Electronic)	9781628418392
DOIs	https://doi.org/10.1117/12.2194864
Publication status	Published - 1 Jan 2015
Event	24th International Conference on Optical Fibre Sensors, OFS 2015 - Pestana Hotel and Convention Centre, Curitiba, Brazil Duration: 28 Sept 2015 → 2 Oct 2015

Conference

Conference	24th International Conference on Optical Fibre Sensors, OFS 2015
Country/Territory	Brazil
City	Curitiba
Period	28/09/15 → 2/10/15

Keywords

Gas sensor
Interference
Microstructured fiber
Optical fiber sensor
Photonic bandgap fiber
Photonic crystal fiber
Photothermal effect

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1117/12.2194864

Cite this

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title = "In-fiber modal interferometer for high sensitivity gas detection",

abstract = "We demonstrate a gas sensor based on mode interference in a hollow-core photonic bandgap fiber. Gas absorption of a pump laser beam induces phase modulation of a propagating probe beam, which is detected by use of an in-fiber modal interferometer. An estimated detection limit of 2 ppm acetylene (7x10-5 in terms of noise equivalent absorbance or NEA) is achieved with 30-cm-long HC-PBF operating at the near infrared wavelength. This NEA is 22 times better than state-of-the-art HC-PBF gas sensors based on direct absorption spectroscopy.",

keywords = "Gas sensor, Interference, Microstructured fiber, Optical fiber sensor, Photonic bandgap fiber, Photonic crystal fiber, Photothermal effect",

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AU - Jin, Wei

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N2 - We demonstrate a gas sensor based on mode interference in a hollow-core photonic bandgap fiber. Gas absorption of a pump laser beam induces phase modulation of a propagating probe beam, which is detected by use of an in-fiber modal interferometer. An estimated detection limit of 2 ppm acetylene (7x10-5 in terms of noise equivalent absorbance or NEA) is achieved with 30-cm-long HC-PBF operating at the near infrared wavelength. This NEA is 22 times better than state-of-the-art HC-PBF gas sensors based on direct absorption spectroscopy.

AB - We demonstrate a gas sensor based on mode interference in a hollow-core photonic bandgap fiber. Gas absorption of a pump laser beam induces phase modulation of a propagating probe beam, which is detected by use of an in-fiber modal interferometer. An estimated detection limit of 2 ppm acetylene (7x10-5 in terms of noise equivalent absorbance or NEA) is achieved with 30-cm-long HC-PBF operating at the near infrared wavelength. This NEA is 22 times better than state-of-the-art HC-PBF gas sensors based on direct absorption spectroscopy.

KW - Gas sensor

KW - Interference

KW - Microstructured fiber

KW - Optical fiber sensor

KW - Photonic bandgap fiber

KW - Photonic crystal fiber

KW - Photothermal effect

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DO - 10.1117/12.2194864

M3 - Conference article published in proceeding or book

VL - 9634

BT - 24th International Conference on Optical Fibre Sensors, OFS 2015

PB - SPIE

T2 - 24th International Conference on Optical Fibre Sensors, OFS 2015

Y2 - 28 September 2015 through 2 October 2015

ER -

In-fiber modal interferometer for high sensitivity gas detection

Abstract

Conference

Keywords

ASJC Scopus subject areas

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