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Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes. / Mangini, Fabio; Ferraro, Mario; Gemechu, Wasyhun et al.
Proceedings Laser Resonators, Microresonators, and Beam Control XXVII. ed. / Andrea M. Armani; Alexis V. Kudryashov; Vladimir S. Ilchenko; Andrey B. Matsko; Julia V. Sheldakova. Vol. 13349 The International Society for Optical Engineering, 2025. 133490B (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13349).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Harvard
Mangini, F, Ferraro, M, Gemechu, W, Sun, Y
, Gervaziev, M, Kharenko, D, Babin, S, Couderc, V & Wabnitz, S 2025,
Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes. in AM Armani, AV Kudryashov, VS Ilchenko, AB Matsko & JV Sheldakova (eds),
Proceedings Laser Resonators, Microresonators, and Beam Control XXVII. vol. 13349, 133490B, Proceedings of SPIE - The International Society for Optical Engineering, vol. 13349, The International Society for Optical Engineering, Laser Resonators, Microresonators, and Beam Control XXVII 2025, San Francisco, United States,
28.01.2025.
https://doi.org/10.1117/12.3048505APA
Mangini, F., Ferraro, M., Gemechu, W., Sun, Y.
, Gervaziev, M., Kharenko, D., Babin, S., Couderc, V., & Wabnitz, S. (2025).
Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes. In A. M. Armani, A. V. Kudryashov, V. S. Ilchenko, A. B. Matsko, & J. V. Sheldakova (Eds.),
Proceedings Laser Resonators, Microresonators, and Beam Control XXVII (Vol. 13349). [133490B] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13349). The International Society for Optical Engineering.
https://doi.org/10.1117/12.3048505Vancouver
Mangini F, Ferraro M, Gemechu W, Sun Y
, Gervaziev M, Kharenko D et al.
Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes. In Armani AM, Kudryashov AV, Ilchenko VS, Matsko AB, Sheldakova JV, editors, Proceedings Laser Resonators, Microresonators, and Beam Control XXVII. Vol. 13349. The International Society for Optical Engineering. 2025. 133490B. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.3048505
Author
BibTeX
@inproceedings{b0762e14265f47ae98b144c564af0441,
title = "Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes",
abstract = "We present a direct experimental demonstration that spatial beam self-cleaning in nonlinear multimode graded-index optical fibers arises from the nonequilibrium evolution of the mode population toward a state of thermal equilibrium. This process is shown to be a result of the maximization of the optical entropy of the modal distribution. Entropy maximization is observed both when the input beam power is increased with a fixed length of fiber, and when the fiber length grows larger while keeping the input beam power constant.",
keywords = "fiber lasers, four-wave-mixing, kerr effect, optical fibers, spatial beam control, transverse effects",
author = "Fabio Mangini and Mario Ferraro and Wasyhun Gemechu and Yifan Sun and Mikhail Gervaziev and Denis Kharenko and Sergey Babin and Vincent Couderc and Stefan Wabnitz",
note = "This work was supported by: the EU - Next Generation EU under the Italian National Recovery and Resilience Plan (NRRP), Mission 4, CUP B53C22004050001, partnership on “Telecommunications of the Future” (PE00000001 - program “RESTART”) (F.M., S.W.), the Italian Ministerial grant PRIN2022 ”SAFE” (2022ESAC3K) (W.G.), the French research national agency (ANR-18-CE080016-01, ANR-10-LABX-0074-01) and the Russian Science Foundation (21-72-30024).; Laser Resonators, Microresonators, and Beam Control XXVII 2025 ; Conference date: 28-01-2025 Through 30-01-2025",
year = "2025",
doi = "10.1117/12.3048505",
language = "English",
isbn = "978-151068446-1",
volume = "13349",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "The International Society for Optical Engineering",
editor = "Armani, {Andrea M.} and Kudryashov, {Alexis V.} and Ilchenko, {Vladimir S.} and Matsko, {Andrey B.} and Sheldakova, {Julia V.}",
booktitle = "Proceedings Laser Resonators, Microresonators, and Beam Control XXVII",
address = "United States",
}
RIS
TY - GEN
T1 - Spatial beam self-cleaning: from non-equilibrium to thermalization of nonlinear multimode fiber modes
AU - Mangini, Fabio
AU - Ferraro, Mario
AU - Gemechu, Wasyhun
AU - Sun, Yifan
AU - Gervaziev, Mikhail
AU - Kharenko, Denis
AU - Babin, Sergey
AU - Couderc, Vincent
AU - Wabnitz, Stefan
N1 - This work was supported by: the EU - Next Generation EU under the Italian National Recovery and Resilience Plan (NRRP), Mission 4, CUP B53C22004050001, partnership on “Telecommunications of the Future” (PE00000001 - program “RESTART”) (F.M., S.W.), the Italian Ministerial grant PRIN2022 ”SAFE” (2022ESAC3K) (W.G.), the French research national agency (ANR-18-CE080016-01, ANR-10-LABX-0074-01) and the Russian Science Foundation (21-72-30024).
PY - 2025
Y1 - 2025
N2 - We present a direct experimental demonstration that spatial beam self-cleaning in nonlinear multimode graded-index optical fibers arises from the nonequilibrium evolution of the mode population toward a state of thermal equilibrium. This process is shown to be a result of the maximization of the optical entropy of the modal distribution. Entropy maximization is observed both when the input beam power is increased with a fixed length of fiber, and when the fiber length grows larger while keeping the input beam power constant.
AB - We present a direct experimental demonstration that spatial beam self-cleaning in nonlinear multimode graded-index optical fibers arises from the nonequilibrium evolution of the mode population toward a state of thermal equilibrium. This process is shown to be a result of the maximization of the optical entropy of the modal distribution. Entropy maximization is observed both when the input beam power is increased with a fixed length of fiber, and when the fiber length grows larger while keeping the input beam power constant.
KW - fiber lasers
KW - four-wave-mixing
KW - kerr effect
KW - optical fibers
KW - spatial beam control
KW - transverse effects
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105002443358&origin=inward&txGid=8880bc811ef0c5007878a85c470fcd80
UR - https://www.mendeley.com/catalogue/67819cb2-2edb-3b7d-bece-3557c972aa4a/
U2 - 10.1117/12.3048505
DO - 10.1117/12.3048505
M3 - Conference contribution
SN - 978-151068446-1
VL - 13349
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Proceedings Laser Resonators, Microresonators, and Beam Control XXVII
A2 - Armani, Andrea M.
A2 - Kudryashov, Alexis V.
A2 - Ilchenko, Vladimir S.
A2 - Matsko, Andrey B.
A2 - Sheldakova, Julia V.
PB - The International Society for Optical Engineering
T2 - Laser Resonators, Microresonators, and Beam Control XXVII 2025
Y2 - 28 January 2025 through 30 January 2025
ER -
