Higher-order Kerr terms allow ionization-free ﬁlamentation in gases

6533b82efe1ef96bd1294387

RESEARCH PRODUCT

Higher-order Kerr terms allow ionization-free ﬁlamentation in gases

Pierre Béjot J. Kasparian S. Henin V. Loriot T. Vieillard E. Hertz O. Faucher B. Lavorel J. -P Wolf

subject

[PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Molecular alignment Physics::Plasma Physics Femtosecond phenomena Plasmas Self-focusing [ PHYS.PHYS.PHYS-ATOM-PH ] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Physics::Optics 42.65.Jx 37.10.Vz 42.65.Tg 78.20.Ci Ultrafast nonlinear optics [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]Optical Kerr effect Laser filamentation

description

International audience; We show that higher-order nonlinear indices (n4 , n6 , n8 , n10) provide the main defocusing contribution to self-channeling of ultrashort laser pulses in air and Argon at 800 nm, in contrast with the previously accepted mechanism of ﬁlamentation where plasma was considered as the dominant defocusing process. Their consideration allows to reproduce experimentally observed intensities and plasma densities in self-guided ﬁlaments.

year	journal	country	edition	language
2010-03-12

https://hal.archives-ouvertes.fr/hal-00464524

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