Mid-infrared dispersive wave generation in gas-filled photonic crystal fibre by transient ionization-driven changes in dispersion

F. Köttig (), D. Novoa, F. Tani, M. C. Günendi, M. Cassataro, J. C. Travers and P. St.J. Russell
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F. Köttig: Max Planck Institute for the Science of Light
D. Novoa: Max Planck Institute for the Science of Light
F. Tani: Max Planck Institute for the Science of Light
M. C. Günendi: Max Planck Institute for the Science of Light
M. Cassataro: Max Planck Institute for the Science of Light
J. C. Travers: Max Planck Institute for the Science of Light
P. St.J. Russell: Max Planck Institute for the Science of Light

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Gas-filled hollow-core photonic crystal fibre is being used to generate ever wider supercontinuum spectra, in particular via dispersive wave emission in the deep and vacuum ultraviolet, with a multitude of applications. Dispersive waves are the result of nonlinear transfer of energy from a self-compressed soliton, a process that relies crucially on phase-matching. It was recently predicted that, in the strong-field regime, the additional transient anomalous dispersion introduced by gas ionization would allow phase-matched dispersive wave generation in the mid-infrared—something that is forbidden in the absence of free electrons. Here we report the experimental observation of such mid-infrared dispersive waves, embedded in a 4.7-octave-wide supercontinuum that uniquely reaches simultaneously to the vacuum ultraviolet, with up to 1.7 W of total average power.

Date: 2017
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DOI: 10.1038/s41467-017-00943-4

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