Abstract

We investigate the potential of four-wave mixing in dielectric hollow waveguides for vacuum ultraviolet pulse generation with unprecedented short durations. Taking into account higher-order transverse modes and plasma effects we predict the generation of a $2.5\mathrm{fs}$ pulse at $160\mathrm{nm}$ using an intense $10\mathrm{fs}$, $800\mathrm{nm}$ pulse and its weaker third harmonic at $267\mathrm{nm}$, both coupled to the fundamental transverse mode. Excitation of higher transverse modes allows an increase of the signal energy (up to by a factor of 20), but with a pulse duration of $13\mathrm{fs}$ (compressible to $7.7\mathrm{fs}$).

© 2008 Optical Society of America

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