Self-channeling of ultrashort laser pulses in materials with anomalous dispersion

L. Bergé, S. Skupin
2005 Physical Review E  
The nonlinear dynamics of femtosecond optical pulses propagating in solid media with anomalous groupvelocity dispersion ͑GVD͒ is investigated. A map fixing the boundaries of collapse or noncollapse regimes for high-power beams versus the relative strength of GVD is first established. Next, from a nonlinear Schrödinger model accounting for higher-order dispersion, self-steepening, and plasma generation, the possibility of producing extended collapse events that promote a long self-guiding is
more » ... self-guiding is confirmed, in agreement with recent experiments ͓K.D. Moll and A.L. Gaeta, Opt. Lett. 29, 995 ͑2004͔͒. Three-dimensional collapsing pulses are shown to propagate by emitting quasiperiodically bursts of temporally compressed light bullets, with durations close to the single cycle limit.
doi:10.1103/physreve.71.065601 pmid:16089810 fatcat:plpd6zyrona2jkyhf7cvef37ba