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Sub-ppm gas phase Raman spectroscopy in an anti-resonant hollow core fiber

Sub-ppm gas phase Raman spectroscopy in an anti-resonant hollow core fiber
Sub-ppm gas phase Raman spectroscopy in an anti-resonant hollow core fiber
We demonstrate recent progress in the development of a Raman gas sensor using a single cladding ring anti-resonant hollow core micro-structured optical fiber (HC-ARF) and a low power pump source. The HC-ARF was designed specifically for low attenuation and wide bandwidth in the visible spectral region and provided low loss at both the pump wavelength (532 nm) and Stokes wavelengths up to a Raman shift of 5000 cm-1. A novel selective core pressurization scheme was also implemented to further reduce the confinement loss, improving the Raman signal enhancement by a factor of 1.9 compared to a standard fiber filling scheme. By exploiting longer lengths of fiber, direct detection of both methane and hydrogen at concentrations of 5 and 10 ppm respectively is demonstrated and a noise equivalent limit-of-detection of 0.15 ppm is calculated for methane.
1094-4087
43317-43329
Kelly, Thomas William
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Davidson, Ian
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Warren, Charles
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Brooks, WIlliam
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Foster, Michael
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Poletti, Francesco
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Richardson, David J.
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Horak, Peter
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Wheeler, Natalie
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Kelly, Thomas William
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Davidson, Ian
b685f949-e9e4-4e6b-9a59-36739de06a61
Warren, Charles
5ef093c9-305f-48ae-8b07-c05e6eca06f6
Brooks, WIlliam
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Foster, Michael
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Poletti, Francesco
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Richardson, David J.
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Horak, Peter
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Wheeler, Natalie
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Kelly, Thomas William, Davidson, Ian, Warren, Charles, Brooks, WIlliam, Foster, Michael, Poletti, Francesco, Richardson, David J., Horak, Peter and Wheeler, Natalie (2022) Sub-ppm gas phase Raman spectroscopy in an anti-resonant hollow core fiber. Optics Express, 30 (24), 43317-43329. (doi:10.1364/OE.473887).

Record type: Article

Abstract

We demonstrate recent progress in the development of a Raman gas sensor using a single cladding ring anti-resonant hollow core micro-structured optical fiber (HC-ARF) and a low power pump source. The HC-ARF was designed specifically for low attenuation and wide bandwidth in the visible spectral region and provided low loss at both the pump wavelength (532 nm) and Stokes wavelengths up to a Raman shift of 5000 cm-1. A novel selective core pressurization scheme was also implemented to further reduce the confinement loss, improving the Raman signal enhancement by a factor of 1.9 compared to a standard fiber filling scheme. By exploiting longer lengths of fiber, direct detection of both methane and hydrogen at concentrations of 5 and 10 ppm respectively is demonstrated and a noise equivalent limit-of-detection of 0.15 ppm is calculated for methane.

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Accepted/In Press date: 17 October 2022
Published date: 21 November 2022
Additional Information: Funding Information: Royal Society (UF140538); Engineering and Physical Sciences Research Council (EP/P030181/1); Innovate UK (Project 103973).

Identifiers

Local EPrints ID: 471632
URI: http://eprints.soton.ac.uk/id/eprint/471632
ISSN: 1094-4087
PURE UUID: 6faa9a73-59db-4b3f-88c7-732237665829
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083
ORCID for David J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for Natalie Wheeler: ORCID iD orcid.org/0000-0002-1265-9510

Catalogue record

Date deposited: 15 Nov 2022 17:49
Last modified: 17 Mar 2024 03:24

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Contributors

Author: Thomas William Kelly
Author: Ian Davidson
Author: Charles Warren
Author: WIlliam Brooks
Author: Michael Foster
Author: Francesco Poletti ORCID iD
Author: Peter Horak ORCID iD
Author: Natalie Wheeler ORCID iD

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