Abstract
We present results on supercontinuum generation extended up to 230 nm in air during the propagation of a powerful femtosecond laser pulse. The broad supercontinuum generated in air is contributed by self-phase modulation and self-steepening of the fundamental laser pulse, the third-harmonic pulse and their interaction. In particular, the strong interaction between the fundamental and the third-harmonic pulses leads to broad and efficient continuum generation of the third-harmonic pulse itself. The spectrum of the third-harmonic generated in air extends over several tens of nm and overlaps with the shorter wavelength extent of the fundamental continuum.
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42.65.Ky; 42.65.Jx; 52.35.Mw
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Théberge, F., Liu, W., Luo, Q. et al. Ultrabroadband continuum generated in air (down to 230 nm) using ultrashort and intense laser pulses. Appl. Phys. B 80, 221–225 (2005). https://doi.org/10.1007/s00340-004-1689-x
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DOI: https://doi.org/10.1007/s00340-004-1689-x