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Theoretical analysis of backscattering in hollow-core antiresonant fibers

Theoretical analysis of backscattering in hollow-core antiresonant fibers
Theoretical analysis of backscattering in hollow-core antiresonant fibers
We present a theoretical analysis into the fundamental physical mechanisms contributing to backscattering in hollow-core antiresonant fibers. We consider Rayleigh scattering originating from the hollow regions of the fiber which maybe filled with gases, Rayleigh scattering from within the glass membranes as well as the contribution from scatteringat the glass surfaces. We derive expressions for the backscattering coefficient into any specified guided mode for anarbitrary excitation. These lead to general scaling relations with the core size and wavelength which are found to be thekey parameters for backscattering, regardless of the exact antiresonant geometry. For a nested antiresonant hollow-corefiber with a core diameter of 35 μm, the only antiresonant fiber geometry for which experimental data is available inthe literature, we find that the surface-scattering limited backscattering coefficient of the fundamental mode into itselfis nearly 40 dB below that of a single mode fiber, in good agreement with recently published measurements.
2378-0967
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Michaud-Belleau, Vincent
5e8f2c22-15f1-407f-81aa-bafd5bb23edd
Genest, Jérôme
4eddff9c-a4db-49f4-99a8-1e2cba7c9e88
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491
Numkam Fokoua, Eric
6d9f7e50-dc3b-440a-a0b9-f4a08dd02ccd
Michaud-Belleau, Vincent
5e8f2c22-15f1-407f-81aa-bafd5bb23edd
Genest, Jérôme
4eddff9c-a4db-49f4-99a8-1e2cba7c9e88
Slavík, Radan
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Poletti, Francesco
9adcef99-5558-4644-96d7-ce24b5897491

Numkam Fokoua, Eric, Michaud-Belleau, Vincent, Genest, Jérôme, Slavík, Radan and Poletti, Francesco (2021) Theoretical analysis of backscattering in hollow-core antiresonant fibers. APL Photonics, 6 (9), [096106]. (doi:10.1063/5.0057999).

Record type: Article

Abstract

We present a theoretical analysis into the fundamental physical mechanisms contributing to backscattering in hollow-core antiresonant fibers. We consider Rayleigh scattering originating from the hollow regions of the fiber which maybe filled with gases, Rayleigh scattering from within the glass membranes as well as the contribution from scatteringat the glass surfaces. We derive expressions for the backscattering coefficient into any specified guided mode for anarbitrary excitation. These lead to general scaling relations with the core size and wavelength which are found to be thekey parameters for backscattering, regardless of the exact antiresonant geometry. For a nested antiresonant hollow-corefiber with a core diameter of 35 μm, the only antiresonant fiber geometry for which experimental data is available inthe literature, we find that the surface-scattering limited backscattering coefficient of the fundamental mode into itselfis nearly 40 dB below that of a single mode fiber, in good agreement with recently published measurements.

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Theoretical_Analysis_of_Backscattering_APL_AcceptedManuscript - Accepted Manuscript
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Accepted/In Press date: 23 August 2021
e-pub ahead of print date: 9 September 2021

Identifiers

Local EPrints ID: 451601
URI: http://eprints.soton.ac.uk/id/eprint/451601
ISSN: 2378-0967
PURE UUID: 133f4d67-e95d-49cb-8cff-00d205b21680
ORCID for Eric Numkam Fokoua: ORCID iD orcid.org/0000-0003-0873-911X
ORCID for Radan Slavík: ORCID iD orcid.org/0000-0002-9336-4262
ORCID for Francesco Poletti: ORCID iD orcid.org/0000-0002-1000-3083

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Date deposited: 13 Oct 2021 16:30
Last modified: 28 Apr 2022 02:09

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Contributors

Author: Vincent Michaud-Belleau
Author: Jérôme Genest
Author: Radan Slavík ORCID iD

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