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Efficient generation of third harmonic radiation in air filaments: A revisit

  • Laboratory d'Optique Appliquée, ENSTA, CNRS-École Polytechnique
  • ONERA Office National d'Etudes et Recherches Aerospatiales

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

In this paper we revisit the third harmonic generation from a femtosecond laser filament in air and its significant enhancement (~ 100 times) with a intercepting pump pulse, which has been reported very recently. The enhanced third harmonic is studied as a function of the pulse polarization, time delay between the pump and signal pulses, laser pulse energy, etc. We provide an explanation for the enhancement of third harmonic based on a quenching of interference effects present near filamentation threshold. Simulations based on a two-color propagation code reproduce well the experimental observations and confirm our interpretation.

langue originaleAnglais
Pages (de - à)4706-4713
Nombre de pages8
journalOptics Communications
Volume284
Numéro de publication19
Les DOIs
étatPublié - 1 sept. 2011

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