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arXiv · 1701.04843

Novel mid-infrared dispersive wave generation in gas-filled PCF by transient ionization-driven changes in dispersion

F. Köttig·D. Novoa·F. Tani·M. Cassataro·J. C. Travers·P. St. J. Russell
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Abstract

Gas-filled hollow-core photonic crystal fibre (PCF) is being used to generate ever wider supercontinuum spectra, in particular via dispersive wave (DW) emission in the deep and vacuum ultraviolet, with a multitude of applications. DWs are the result of the resonant transfer of energy from a self-compressed soliton, a process which 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 DW generation in the mid-infrared (MIR)-something that is forbidden in the absence of free electrons. Here we report for the first time the experimental observation of such MIR DWs, 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.

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F. Köttig, D. Novoa, F. Tani, M. Cassataro, J. C. Travers, P. St. J. Russell. 2017-01-17. Novel mid-infrared dispersive wave generation in gas-filled PCF by transient ionization-driven changes in dispersion. https://doi.org/10.1038/s41467-017-00943-4

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