Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED
Nonlinear random waves exhibit a phenomenon of irreversible thermalization, in analogy with the thermalization of a classical gas system. This irreversible process of thermalization to the Rayleigh-Jeans equilibrium distribution has been recently observed experimentally in multimode optical fibers....
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/13/epjconf_eosam2023_06024.pdf |
| _version_ | 1797634858135060480 |
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| author | Baudin Kilian Garnier Josselin Berti Nicolas Fusaro Adrien Zanaglia Lucas Michel Claire Doya Valérie Krupa Katarzyna Millot Guy Picozzi Antonio |
| author_facet | Baudin Kilian Garnier Josselin Berti Nicolas Fusaro Adrien Zanaglia Lucas Michel Claire Doya Valérie Krupa Katarzyna Millot Guy Picozzi Antonio |
| author_sort | Baudin Kilian |
| collection | DOAJ |
| description | Nonlinear random waves exhibit a phenomenon of irreversible thermalization, in analogy with the thermalization of a classical gas system. This irreversible process of thermalization to the Rayleigh-Jeans equilibrium distribution has been recently observed experimentally in multimode optical fibers. Here we discuss a recent progress along two different directions. Firstly, we report the observation of thermalization to negative temperature equilibrium states, in which high-order fiber modes are more populated than low-order modes. Secondly, we analyze the impact of disorder inherent to light propagation in multimode fibers. We identify an unexpected regime in which strong random coupling among non-degenerate modes leads to a nonequilibrium process of Rayleigh-Jeans thermalization. |
| first_indexed | 2024-03-11T12:14:13Z |
| format | Article |
| id | doaj.art-e2962336e98648ba9c5f998a56a78a20 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-03-11T12:14:13Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-e2962336e98648ba9c5f998a56a78a202023-11-07T10:20:48ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012870602410.1051/epjconf/202328706024epjconf_eosam2023_06024Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITEDBaudin Kilian0Garnier Josselin1Berti Nicolas2Fusaro Adrien3Zanaglia Lucas4Michel Claire5Doya Valérie6Krupa Katarzyna7Millot Guy8Picozzi Antonio9Université de Bourgogne, Laboratoire Interdisciplinaire Carnot de BourgogneCMAP, CNRS, Ecole Polytechnique, Institut Polytechnique de ParisUniversité de Bourgogne, Laboratoire Interdisciplinaire Carnot de BourgogneCEA, DAM, DIFUniversité Côte d’Azur, CNRS, Institut de Physique de NiceUniversité Côte d’Azur, CNRS, Institut de Physique de NiceUniversité Côte d’Azur, CNRS, Institut de Physique de NiceInstitute of Physical Chemistry Polish Academy of SciencesUniversité de Bourgogne, Laboratoire Interdisciplinaire Carnot de BourgogneUniversité de Bourgogne, Laboratoire Interdisciplinaire Carnot de BourgogneNonlinear random waves exhibit a phenomenon of irreversible thermalization, in analogy with the thermalization of a classical gas system. This irreversible process of thermalization to the Rayleigh-Jeans equilibrium distribution has been recently observed experimentally in multimode optical fibers. Here we discuss a recent progress along two different directions. Firstly, we report the observation of thermalization to negative temperature equilibrium states, in which high-order fiber modes are more populated than low-order modes. Secondly, we analyze the impact of disorder inherent to light propagation in multimode fibers. We identify an unexpected regime in which strong random coupling among non-degenerate modes leads to a nonequilibrium process of Rayleigh-Jeans thermalization.https://www.epj-conferences.org/articles/epjconf/pdf/2023/13/epjconf_eosam2023_06024.pdf |
| spellingShingle | Baudin Kilian Garnier Josselin Berti Nicolas Fusaro Adrien Zanaglia Lucas Michel Claire Doya Valérie Krupa Katarzyna Millot Guy Picozzi Antonio Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED EPJ Web of Conferences |
| title | Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED |
| title_full | Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED |
| title_fullStr | Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED |
| title_full_unstemmed | Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED |
| title_short | Thermalization of light waves in multimode optical fibers: Negative temperatures equilibrium states and the role of disorder - INVITED |
| title_sort | thermalization of light waves in multimode optical fibers negative temperatures equilibrium states and the role of disorder invited |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/13/epjconf_eosam2023_06024.pdf |
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