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Transition from Plasma-Driven to Kerr-Driven Laser Filamentation

Lavorel, B.
Faucher, O.
Published in Physical Review Letters. 2011, vol. 106, no. 24
Abstract 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 potentially dominant defocusing contribution to filament stabilization. In a pump-probe experiment supported by numerical simulations, we demonstrate the transition between two distinct filamentation regimes at 800 nm. For long pulses (1.2 ps), the plasma substantially contributes to filamentation, while this contribution vanishes for short pulses (70 fs). These results confirm the occurrence, in adequate conditions, of filamentation driven by the HOKE rather than by plasma.
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BEJOT, Pierre Olivier et al. Transition from Plasma-Driven to Kerr-Driven Laser Filamentation. In: Physical Review Letters, 2011, vol. 106, n° 24. https://archive-ouverte.unige.ch/unige:37098

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Deposited on : 2014-06-03

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