Higher-order Kerr terms allow ionization-free filamentation in gases.
- Béjot P Université de Genève, GAP-Biophotonics, 20 rue de l'Ecole de Médecine, 1211 Geneva 4, Switzerland.
- Kasparian J
- Henin S
- Loriot V
- Vieillard T
- Hertz E
- Faucher O
- Lavorel B
- Wolf JP
- 2010-04-07
Published in:
- Physical review letters. - 2010
English
We show that higher-order nonlinear indices (n(4), n(6), n(8), n(10)) 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 us to reproduce experimentally observed intensities and plasma densities in self-guided filaments.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.104.103903
- PMID 20366427
- Persistent URL
- https://folia.unifr.ch/global/documents/220410
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