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Designing silicon-core fiber tapers for efficient supercontinuum generation in the greenhouse gas absorption region

Designing silicon-core fiber tapers for efficient supercontinuum generation in the greenhouse gas absorption region
Designing silicon-core fiber tapers for efficient supercontinuum generation in the greenhouse gas absorption region
We propose a tapered silicon-core optical fiber design for extending the long-wavelength edge of supercontinuum generation to obtain a high spectral density source across the 3-4.5 µm regime. The taper works by generating sufficient spectral broadening of the driving laser pulse to produce a series of pumps for nondegenerate four-wave mixing, and then opening up new phase-matching conditions to transfer the power from these pumps to a target region of mid-infrared wavelengths. We show, by simulation, that this taper design works effectively when pumped with a conventional 2.1 µm femtosecond fiber laser, significantly improving the spectral coverage obtained with a fixed-diameter fiber. Thus, these tapered silicon-core fibers offer a potential platform for an efficient all-fiber spectroscopy solution to measure greenhouse gases.
Four-wave mixing, fiber tapers, mid-infrared, nonlinear optics, optical fibers, silicon, supercontinuum
0740-3224
1698-1706
Campling, Joseph
daeaf1d9-ff3c-4efd-a618-3a248b79e7f5
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Peacock, Anna C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc
Campling, Joseph
daeaf1d9-ff3c-4efd-a618-3a248b79e7f5
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Peacock, Anna C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc

Campling, Joseph, Horak, Peter and Peacock, Anna C. (2020) Designing silicon-core fiber tapers for efficient supercontinuum generation in the greenhouse gas absorption region. Journal of the Optical Society of America B: Optical Physics, 37 (6), 1698-1706. (doi:10.1364/JOSAB.392346).

Record type: Article

Abstract

We propose a tapered silicon-core optical fiber design for extending the long-wavelength edge of supercontinuum generation to obtain a high spectral density source across the 3-4.5 µm regime. The taper works by generating sufficient spectral broadening of the driving laser pulse to produce a series of pumps for nondegenerate four-wave mixing, and then opening up new phase-matching conditions to transfer the power from these pumps to a target region of mid-infrared wavelengths. We show, by simulation, that this taper design works effectively when pumped with a conventional 2.1 µm femtosecond fiber laser, significantly improving the spectral coverage obtained with a fixed-diameter fiber. Thus, these tapered silicon-core fibers offer a potential platform for an efficient all-fiber spectroscopy solution to measure greenhouse gases.

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Accepted/In Press date: 21 April 2020
e-pub ahead of print date: 18 May 2020
Published date: June 2020
Keywords: Four-wave mixing, fiber tapers, mid-infrared, nonlinear optics, optical fibers, silicon, supercontinuum

Identifiers

Local EPrints ID: 440908
URI: http://eprints.soton.ac.uk/id/eprint/440908
ISSN: 0740-3224
PURE UUID: 1fbff8bf-7bb1-42ec-ba35-e041edae5f68
ORCID for Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for Anna C. Peacock: ORCID iD orcid.org/0000-0002-1940-7172

Catalogue record

Date deposited: 22 May 2020 16:37
Last modified: 28 Apr 2022 06:31

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Contributors

Author: Joseph Campling
Author: Peter Horak ORCID iD
Author: Anna C. Peacock ORCID iD

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