We overview complex spatio-temporal propagation phenomena in nonlinear multimode optical fibers (MMFs) [1]. In the anomalous dispersion regime, longitudinal periodic intensity oscillations of optical multimode solitons [2] lead to controlled generation of ultra-wideband dispersive wave sidebands [3,4]. Whereas in the normal dispersion, sideband series from the visible till the mid-infrared (MIR) are generated from parametric instability of continuous waves [5,6]. Before the onset of temporal instabilities however, the Kerr effects leads to intriguing effect of spatial beam self-cleaning towards a well-defined and robust bell-shaped transverse profile in graded-index (GRIN) MMFs [7]. The interplay with Raman scattering generates spectrally flat, spatially single-mode supercontinua extending from the visible till the MIR from GRIN MMFs [8]. A temporally resolved analysis reveals that significant (tenfold) temporal compression is achieved in the spectral sidebands [8]. Spatial Kerr self-cleaning was observed with increased efficiency in active, ytterbium doped MMF with a step-index profile [9]. When optically poling a GRIN MMF, mutual self-cleaning of pump and second-harmonic beams was obtained [10].
Nonlinear spatiotemporal dynamics in multimode fibers / Wabnitz, Stefan. - (2017). (Intervento presentato al convegno XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science tenutosi a Montreal).
Nonlinear spatiotemporal dynamics in multimode fibers
WABNITZ, Stefan
2017
Abstract
We overview complex spatio-temporal propagation phenomena in nonlinear multimode optical fibers (MMFs) [1]. In the anomalous dispersion regime, longitudinal periodic intensity oscillations of optical multimode solitons [2] lead to controlled generation of ultra-wideband dispersive wave sidebands [3,4]. Whereas in the normal dispersion, sideband series from the visible till the mid-infrared (MIR) are generated from parametric instability of continuous waves [5,6]. Before the onset of temporal instabilities however, the Kerr effects leads to intriguing effect of spatial beam self-cleaning towards a well-defined and robust bell-shaped transverse profile in graded-index (GRIN) MMFs [7]. The interplay with Raman scattering generates spectrally flat, spatially single-mode supercontinua extending from the visible till the MIR from GRIN MMFs [8]. A temporally resolved analysis reveals that significant (tenfold) temporal compression is achieved in the spectral sidebands [8]. Spatial Kerr self-cleaning was observed with increased efficiency in active, ytterbium doped MMF with a step-index profile [9]. When optically poling a GRIN MMF, mutual self-cleaning of pump and second-harmonic beams was obtained [10].I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
