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.
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52.38.Hb; 42.65.Tg; 42.65.Jx; 42.68.Ay
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Méjean, G., Kasparian, J., Yu, J. et al. UV–Supercontinuum generated by femtosecond pulse filamentation in air: Meter-range experiments versus numerical simulations. Appl. Phys. B 82, 341–345 (2006). https://doi.org/10.1007/s00340-005-2097-6
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DOI: https://doi.org/10.1007/s00340-005-2097-6