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 may be filled with gases, Rayleigh scattering from within the glass membranes, as well as the contribution from scattering at the glass surfaces. We derive expressions for the backscattering coefficient into any specified guided mode for an arbitrary excitation. These lead to general scaling relations with the core size and wavelength, which are found to be the key parameters for backscattering, regardless of the exact antiresonant geometry. For a nested antiresonant hollow-core fiber with a core diameter of 35 µm, the only antiresonant fiber geometry for which the experimental data are available in the literature, we find that the surface-scattering limited backscattering coefficient of the fundamental mode into itself is nearly 40 dB below that of a single mode fiber, in good agreement with recently published measurements.
Numkam Fokoua, Eric
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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
9 September 2021
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).
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 may be filled with gases, Rayleigh scattering from within the glass membranes, as well as the contribution from scattering at the glass surfaces. We derive expressions for the backscattering coefficient into any specified guided mode for an arbitrary excitation. These lead to general scaling relations with the core size and wavelength, which are found to be the key parameters for backscattering, regardless of the exact antiresonant geometry. For a nested antiresonant hollow-core fiber with a core diameter of 35 µm, the only antiresonant fiber geometry for which the experimental data are available in the literature, we find that the surface-scattering limited backscattering coefficient of the fundamental mode into itself is 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
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More information
Accepted/In Press date: 23 August 2021
e-pub ahead of print date: 9 September 2021
Published date: 9 September 2021
Additional Information:
Funding Information:
E.N.F. and R.S. acknowledge support from the UK Royal Academy of Engineering Research and Senior Research Fellowships. V.M.-B. acknowledges support from the Vanier Canada Graduate Scholarship program.
Funding Information:
The authors acknowledge funding from the Engineering and Physical Sciences Research Council (Grant No. EP/P030181/1), the European Research Council (Grant No. 682724), the Fonds de recherche du Québec–Nature et technologies, and the Natural Sciences and Engineering Research Council of Canada.
Publisher Copyright:
© 2021 Author(s).
Identifiers
Local EPrints ID: 451601
URI: http://eprints.soton.ac.uk/id/eprint/451601
ISSN: 2378-0967
PURE UUID: 133f4d67-e95d-49cb-8cff-00d205b21680
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Date deposited: 13 Oct 2021 16:30
Last modified: 17 Mar 2024 03:32
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Author:
Eric Numkam Fokoua
Author:
Vincent Michaud-Belleau
Author:
Jérôme Genest
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