We overview recent advances in the research on spatiotemporal beam shaping in nonlinear multimode optical fibers. An intense light beam coupled to a graded index (GRIN) highly multimode fiber undergoes a series of complex nonlinear processes when its power grows larger. Among them, the lowest threshold effect is the Kerr-induced beam self-cleaning, that redistributes most of the beam energy into a robust bell-shaped beam close to the fundamental mode. At higher powers a series of spectral sidebands is generated, thanks to the phase matching induced by the long period grating due to the periodic self-imaging of the beam and the Kerr effect. Subsequently a broadband and spectrally flat supercontinuum is generated, extending from the visible to the mid-infrared.

Nonlinear dynamics in multimode optical fibers / Modotto, Daniele; Krupa, Katarzyna; Millot, Guy; Barthelemy, Alain; Couderc, Vincent; Tonello, Alessandro; Wabnitz, Stefan. - 10540:(2018), p. 79. (Intervento presentato al convegno Photonics West 2018 tenutosi a San Francisco, USA) [10.1117/12.2287874].

Nonlinear dynamics in multimode optical fibers

Wabnitz, Stefan
2018

Abstract

We overview recent advances in the research on spatiotemporal beam shaping in nonlinear multimode optical fibers. An intense light beam coupled to a graded index (GRIN) highly multimode fiber undergoes a series of complex nonlinear processes when its power grows larger. Among them, the lowest threshold effect is the Kerr-induced beam self-cleaning, that redistributes most of the beam energy into a robust bell-shaped beam close to the fundamental mode. At higher powers a series of spectral sidebands is generated, thanks to the phase matching induced by the long period grating due to the periodic self-imaging of the beam and the Kerr effect. Subsequently a broadband and spectrally flat supercontinuum is generated, extending from the visible to the mid-infrared.
2018
Photonics West 2018
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Nonlinear dynamics in multimode optical fibers / Modotto, Daniele; Krupa, Katarzyna; Millot, Guy; Barthelemy, Alain; Couderc, Vincent; Tonello, Alessandro; Wabnitz, Stefan. - 10540:(2018), p. 79. (Intervento presentato al convegno Photonics West 2018 tenutosi a San Francisco, USA) [10.1117/12.2287874].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1214005
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