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Hollow-core-fiber delivery of broadband mid-infrared light for remote multi-species spectroscopy

Hollow-core-fiber delivery of broadband mid-infrared light for remote multi-species spectroscopy
Hollow-core-fiber delivery of broadband mid-infrared light for remote multi-species spectroscopy

Mid-infrared (mid-IR) light provides a means to identify molecules using ro-vibrational spectroscopy. Where measurement is required in a remote or hazardous environment, fibre delivery is convenient, but is limited by the scalability of fluoride and chalcogenide fibres to only a few meters in length. Low-loss mid-IR hollow-core fibres (HCFs) have been reported [1] , [2] , with losses at 3.1m of 18 dB km-1 [3]. Here, we report fibre-delivered multi-species mid-IR spectroscopy, with broadband 2850-3150 cm-1 light routed to a remote gas cell via HCF. By using Fourier-transform spectroscopy we achieve resolutions of 0.05 cm-1 and in-fibre concentration measurements of contaminants H35Cl and H37Cl with 5-ppb precision. High-resolution multi-species fitting is used to mitigate spectroscopic interference between species, enabling spectroscopy in a gas cell after the fibre.

IEEE
Johnson, Kerr
3749f9fb-c58b-4c64-9566-5bf043aa7f3c
Castro-Marin, Pablo
04c61dc6-ac95-48fc-83fb-97262a15c3e7
Farrell, Carl
81a24aca-6b9a-44c7-a180-52a4af46f36d
Davidson, Ian A.
b685f949-e9e4-4e6b-9a59-36739de06a61
Jasion, Gregory T.
16cfff1d-d178-41d1-a092-56e6239726b8
Wheeler, Natalie V.
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Reid, Derryck T.
a2de9a04-5689-4157-a7f9-21dc4b6f076b
Johnson, Kerr
3749f9fb-c58b-4c64-9566-5bf043aa7f3c
Castro-Marin, Pablo
04c61dc6-ac95-48fc-83fb-97262a15c3e7
Farrell, Carl
81a24aca-6b9a-44c7-a180-52a4af46f36d
Davidson, Ian A.
b685f949-e9e4-4e6b-9a59-36739de06a61
Jasion, Gregory T.
16cfff1d-d178-41d1-a092-56e6239726b8
Wheeler, Natalie V.
0fd34178-a77b-4c71-a3a6-86a1f634f1a0
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Richardson, David J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Reid, Derryck T.
a2de9a04-5689-4157-a7f9-21dc4b6f076b

Johnson, Kerr, Castro-Marin, Pablo, Farrell, Carl, Davidson, Ian A., Jasion, Gregory T., Wheeler, Natalie V., Poletti, Francesco, Richardson, David J. and Reid, Derryck T. (2021) Hollow-core-fiber delivery of broadband mid-infrared light for remote multi-species spectroscopy. In 2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021. IEEE.. (doi:10.1109/CLEO/Europe-EQEC52157.2021.9542343).

Record type: Conference or Workshop Item (Paper)

Abstract

Mid-infrared (mid-IR) light provides a means to identify molecules using ro-vibrational spectroscopy. Where measurement is required in a remote or hazardous environment, fibre delivery is convenient, but is limited by the scalability of fluoride and chalcogenide fibres to only a few meters in length. Low-loss mid-IR hollow-core fibres (HCFs) have been reported [1] , [2] , with losses at 3.1m of 18 dB km-1 [3]. Here, we report fibre-delivered multi-species mid-IR spectroscopy, with broadband 2850-3150 cm-1 light routed to a remote gas cell via HCF. By using Fourier-transform spectroscopy we achieve resolutions of 0.05 cm-1 and in-fibre concentration measurements of contaminants H35Cl and H37Cl with 5-ppb precision. High-resolution multi-species fitting is used to mitigate spectroscopic interference between species, enabling spectroscopy in a gas cell after the fibre.

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More information

Published date: 25 June 2021
Venue - Dates: 2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021, , Munich, Germany, 2021-06-21 - 2021-06-25

Identifiers

Local EPrints ID: 471083
URI: http://eprints.soton.ac.uk/id/eprint/471083
PURE UUID: 34a98901-3521-4798-b845-dad2fed59596
ORCID for Gregory T. Jasion: ORCID iD orcid.org/0000-0001-5030-6479
ORCID for Natalie V. Wheeler: ORCID iD orcid.org/0000-0002-1265-9510
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

Catalogue record

Date deposited: 25 Oct 2022 16:42
Last modified: 17 Mar 2024 03:24

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Contributors

Author: Kerr Johnson
Author: Pablo Castro-Marin
Author: Carl Farrell
Author: Ian A. Davidson
Author: Gregory T. Jasion ORCID iD
Author: Natalie V. Wheeler ORCID iD
Author: Francesco Poletti ORCID iD
Author: Derryck T. Reid

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