151 citations · 531 across the 16 of their papers we have counts for
16 papers
Generation of High-order Laguerre-Gaussian modes in Coated and Uncoated Graded-Index and Step-Index Multimode Fibers
Wasyhun Asefa Gemechu, Umberto Minoni, Michela Borghetti +4
We report an efficient experimental method for generating high-order Laguerre-Gauss (HOLG) modes by simply coupling a Gaussian beam into the cladding of a multimode fiber (MMF). In…
Numerical analysis of beam self-cleaning in multimode fiber amplifiers
Mesay Addisu Jima, Alessandro Tonello, Alioune Niang +6
Recent experimental results have reported the observation of beam self-cleaning or, more generally, nonlinear beam reshaping in active multimode fibers. In this work we present a n…
Efficient Kerr soliton comb generation in micro-resonator with interferometric back-coupling
J. M. Chavez Boggio, D. Bodenmüller, S. Ahmed +3
Nonlinear Kerr micro-resonators have enabled fundamental breakthroughs in the understanding of dissipative solitons, as well as in their application to optical frequency comb gener…
Spatial beam self-cleaning in tapered Yb-doped GRIN multimode fiber with decelerating nonlinearity
A. Niang, D. Modotto, A. Tonello +12
We experimentally demonstrate spatial beam self-cleaning in an Yb-doped graded-index multimode fiber taper, both in passive and active configurations. The input laser beam at 1064…
Spatial beam self-cleaning in multimode lanthanum aluminum silicate glass fiber
Romain Guénard, Katarzyna Krupa, Alessandro Tonello +11
We demonstrated that spatial Kerr beam self-cleaning can be obtained in a highly multimode multicomponent optical fiber based on lanthanum aluminum silicate oxide glasses (SiO2-Al2…
Spatial Beam Self-Cleaning and Supercontinuum Generation with Yb-doped Multimode Graded-Index Fiber Taper Based on Accelerating Self-Imaging and Dissipative Landscape
A. Niang, T. Mansuryan, K. Krupa +7
We experimentally demonstrate spatial beam self-cleaning and supercontinuum generation in a tapered Ytterbium-doped multimode optical fiber with parabolic core refractive index and…
Refractive index profile tailoring of multimode optical fibers for the spatial and spectral shaping of parametric sidebands
Katarzyna Krupa, Vincent Couderc, Alessandro Tonello +4
We introduce the concept of spatial and spectral control of nonlinear parametric sidebands in multimode optical fibers by tailoring their linear refractive index profile. In all ca…
Nonlinear polarization dynamics of Kerr beam self-cleaning in a GRIN multimode optical fiber
Katarzyna Krupa, Graciela Garmendia Castañeda, Alessandro Tonello +8
We experimentally study polarization dynamics of Kerr beam self-cleaning in a graded-index multimode optical fiber. We show that spatial beam cleaning is accompanied by nonlinear p…
Nonlinear dynamics in multimode optical fibers
Stefan Wabnitz, Alessandro Tonello, Vincent Couderc +4
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 mult…
Interplay of Kerr and Raman beam cleaning with a multimode microstructure fiber
R. Dupiol, K. Krupa, A. Tonello +5
We experimentally study the competition between Kerr beam self-cleaning and Raman beam cleanup in a multimode air-silica microstructure optical fiber. Kerr beam self-cleaning of th…
Spatiotemporal light-beam compression from nonlinear mode coupling
Katarzyna Krupa, Alessandro Tonello, Vincent Couderc +4
We experimentally demonstrate simultaneous spatial and temporal compression in the propagation of light pulses in multimode nonlinear optical fibers. We reveal that the spatial bea…
Efficiency of dispersive wave generation in dual concentric core microstructured fiber
Daniele Modotto, Marco Andreana, Katarzyna Krupa +10
We describe the generation of powerful dispersive waves that are observed when pumping a dual concentric core microstructured fiber by means of a sub-nanosecond laser emitting at t…
Dispersive wave emission in dual concentric core fiber: the role of soliton-soliton collisions
Alessandro Tonello, Daniele Modotto, Katarzyna Krupa +7
Soliton-soliton collisions have a crucial role in enhancing the spectrum of dispersive waves in optical fibers and collisions among in-phase solitons lead to a dramatic enhancement…
Mid-Infrared Soliton and Raman Frequency Comb Generation in Silicon Microrings
Tobias Hansson, Daniele Modotto, Stefan Wabnitz
We numerically study the mechanisms of frequency comb generation in the mid-infrared spectral region from cw pumped silicon microring resonators. Coherent soliton comb generation m…
On the numerical simulation of Kerr frequency combs using coupled mode equations
T. Hansson, D. Modotto, S. Wabnitz
It is demonstrated that Kerr frequency comb generation described by coupled mode equations can be numerically simulated using Fast Fourier Transform methods. This allows broadband…
Dynamics of the Modulational Instability in Microresonator Frequency Combs
T. Hansson, D. Modotto, S. Wabnitz
A study is made of frequency comb generation described by the driven and damped nonlinear Schrödinger equation on a finite interval. It is shown that frequency comb generation can…