: Optical pulses traveling through multimode optical fibers encounter the influence of both linear disturbances and nonlinearity, resulting in a complex and chaotic redistribution of power among different modes. In our research, we explore the phenomenon where multimode fibers reach stable states marked by the concentration of energy into both single and multiple sub-systems. We introduce a weighted Bose-Einstein law, demonstrating its suitability in describing thermalized modal power distributions in the nonlinear regime, as well as steady-state distributions in the linear regime. We apply the law to experimental results and numerical simulations. Our findings reveal that, at power levels situated between the linear and soliton regimes, energy concentration occurs locally within higher-order modal groups before transitioning to global concentration in the fundamental mode within the soliton regime. This research broadens the application of thermodynamic principles to multimode fibers, uncovering previously unexplored optical states that exhibit characteristics akin to optical glass.

Statistics of modal condensation in nonlinear multimode fibers / Zitelli, Mario; Mangini, Fabio; Wabnitz, Stefan. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 15:1(2024), pp. 1-12. [10.1038/s41467-024-45185-3]

Statistics of modal condensation in nonlinear multimode fibers

Mario Zitelli
Primo
;
Fabio Mangini
Secondo
;
Stefan Wabnitz
Ultimo
2024

Abstract

: Optical pulses traveling through multimode optical fibers encounter the influence of both linear disturbances and nonlinearity, resulting in a complex and chaotic redistribution of power among different modes. In our research, we explore the phenomenon where multimode fibers reach stable states marked by the concentration of energy into both single and multiple sub-systems. We introduce a weighted Bose-Einstein law, demonstrating its suitability in describing thermalized modal power distributions in the nonlinear regime, as well as steady-state distributions in the linear regime. We apply the law to experimental results and numerical simulations. Our findings reveal that, at power levels situated between the linear and soliton regimes, energy concentration occurs locally within higher-order modal groups before transitioning to global concentration in the fundamental mode within the soliton regime. This research broadens the application of thermodynamic principles to multimode fibers, uncovering previously unexplored optical states that exhibit characteristics akin to optical glass.
2024
optical thermodynamics; multimode fibers; optical nonlinearity
01 Pubblicazione su rivista::01a Articolo in rivista
Statistics of modal condensation in nonlinear multimode fibers / Zitelli, Mario; Mangini, Fabio; Wabnitz, Stefan. - In: NATURE COMMUNICATIONS. - ISSN 2041-1723. - 15:1(2024), pp. 1-12. [10.1038/s41467-024-45185-3]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1701254
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