Spatio-temporal reshaping and X Wave dynamics in optical filaments

D. Faccio, A. Averchi, A. Couairon, M. Kolesik, J. V. Moloney, A. Dubietis, G. Tamosauskas, P. Polesana, A. Piskarskas, P. Di Trapani

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

We investigate ultrashort laser pulse filamentation within the framework of spontaneous X Wave formation. After a brief overview of the filamentation process we study the case of an intense filament co-propagating with a weaker seed pulse. The filament is shown to induce strong Cross-Phase-Modulation (XPM) effects on the weak seed pulse: driven by the pump, the seed pulse undergoes pulse splitting with the daughter pulses slaved to their pump counterparts. They undergo strong spatio-temporal reshaping and are transformed into X Waves traveling at the same group velocities as the pump split-off pulses. In the presence of a gain mechanism such as Four-Wave-Mixing or Stimulated Raman Scattering, energy is then transferred from the pump filament leading to amplification of the seed X Wave and formation of a temporally compressed intensity peak.

Original languageEnglish (US)
Pages (from-to)13077-13095
Number of pages19
JournalOptics Express
Volume15
Issue number20
DOIs
StatePublished - Oct 1 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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