506 citations
- Centre National de la Recherche ScientifiqueFR44 papers
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7 papers · 1 filter
Transition from plasma- to Kerr-driven laser filamentation
Pierre Béjot, Edouard Hertz, Jérôme Kasparian +3
While filaments are generally interpreted as a dynamic balance between Kerr focusing and plasma defocusing, the role of the higher-order Kerr effect (HOKE) is actively debated as a…
Higher-order Kerr terms allow ionization-free filamentation in gases
P. Béjot, J. Kasparian, S. Henin +6
We show that higher-order nonlinear indices (, , , ) provide the main defocusing contribution to self-channeling of ultrashort laser pulses in air and Argon…
Arbitrary-order non-linear contribution to self-steepening
J. Kasparian, P. Béjot, J. -P. Wolf
Based on the recently published generalized Miller formula, we derive the spectral dependence of the contribution of arbitrary-order non-linear indices to the group-velocity index.…
Spectral dependence of purely-Kerr driven filamentation in air and argon
W. Ettoumi, P. Béjot, Y. Petit +6
Based on numerical simulations, we show that higher-order nonlinear indices (up to and , respectively) of air and argon have a dominant contribution to both focusing…
Parametric Frequency Conversion of Short Optical Pulses Controlled by a CW Background
Matteo Conforti, Fabio Baronio, Antonio Degasperis +1
We predict that parametric sum-frequency generation of an ultra-short pulse may result from the mixing of an ultra-short optical pulse with a quasi-continuous wave control. We anal…
Inelastic Scattering and Interactions of Three-Wave Parametric Solitons
Matteo Conforti, Fabio Baronio, Antonio Degasperis +1
We study the excitation, decay and interactions of novel, velocity locked three-wave parametric solitons in a medium with quadratic nonlinearity and dispersion. We analytically des…