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UV–Supercontinuum generated by femtosecond pulse filamentation in air: Meter-range experiments versus numerical simulations |
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| Authors: | G Méjean J Kasparian J Yu S Frey E Salmon R Ackermann JP Wolf L Bergé S Skupin |
| Institution: | 1. Laboratoire de Spectrométrie Ionique et Moléculaire, Université Cl. Bernard Lyon 1, UMR-CNRS 5579, 69622, Villeurbanne cedex, Lyon, France 2. Département de Physique Théorique et Appliquée, CEA/DAM Ile de France, B.P. 12, 91680, Bruyères-le-Chatel, France 3. Friedrich-Schiller-Universit?t Jena, Max-Wien-Platz 1, 07743, Jena, Germany |
| Abstract: | We report new experimental and numerical results on supercontinuum generation at ultraviolet/visible wavelengths produced by the propagation of infrared femtosecond laser pulses in air. Spectral broadening is shown to similarly affect single filaments over laboratory distance scales, as well as broad beams over long-range propagation distances. Numerical simulations display evidence of the crucial role of third harmonic generation in the build-up of UV–visible wavelengths, by comparison with current single-envelope models including chromatic dispersion and self-steepening. PACS 52.38.Hb; 42.65.Tg; 42.65.Jx; 42.68.Ay |
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