In our experiments, we reveal a so-far unnoticed power limitation of beam self-cleaning in graded-index nonlinear multimode optical fibers. As the optical pulse power is progressively increased, we observed that the initial Kerr-induced improvement of the spatial beam quality is eventually lost. Based on a holographic mode decomposition of the output field, we show that beam spoiling is associated with high-temperature wave thermalization, which depletes the fundamental mode in favor of a highly multimode power distribution.

High-temperature wave thermalization spoils beam self-cleaning in nonlinear multimode GRIN fibers / Mangini, Fabio; Ferraro, Mario; Tonello, Alessandro; Couderc, Vincent; Wabnitz, Stefan. - In: OPTICS LETTERS. - ISSN 0146-9592. - 48:18(2023), pp. 4741-4744. [10.1364/OL.497917]

High-temperature wave thermalization spoils beam self-cleaning in nonlinear multimode GRIN fibers

Mangini, Fabio;Ferraro, Mario;Couderc, Vincent;Wabnitz, Stefan
2023

Abstract

In our experiments, we reveal a so-far unnoticed power limitation of beam self-cleaning in graded-index nonlinear multimode optical fibers. As the optical pulse power is progressively increased, we observed that the initial Kerr-induced improvement of the spatial beam quality is eventually lost. Based on a holographic mode decomposition of the output field, we show that beam spoiling is associated with high-temperature wave thermalization, which depletes the fundamental mode in favor of a highly multimode power distribution.
2023
optical fibers; Kerr effect; thermodynamics
01 Pubblicazione su rivista::01a Articolo in rivista
High-temperature wave thermalization spoils beam self-cleaning in nonlinear multimode GRIN fibers / Mangini, Fabio; Ferraro, Mario; Tonello, Alessandro; Couderc, Vincent; Wabnitz, Stefan. - In: OPTICS LETTERS. - ISSN 0146-9592. - 48:18(2023), pp. 4741-4744. [10.1364/OL.497917]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1687764
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