Higher-order Kerr effects improve quantitative modelling of harmonics generation and laser filamentation
1 GAP, Université de Genéve, rue de l’Ecole de Médecine 20, CH 1211 Genéve 4, Switzerland .
2 Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), UMR 5209 CNRS-Université de Bourgogne, BP 47870, F-21078 Dijon Cedex, France
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The consideration of the higher-order Kerr effect (HOKE) drastically improves the quantitative agreement between measured and simulated harmonic yield as well as intensity and electron density in laser filaments generated by pulses below a few hundreds of fs. In longer pulses, the plasma defocusing plays a much more important role.
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