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

Felix Köttig, David Novoa, Francesco Tani, Mehmet C. Günendi, Marco Cassataro, John Travers, Philip St. J. Russell

Research output: Contribution to journalArticle

25 Citations (Scopus)
17 Downloads (Pure)

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.
Original languageEnglish
Article number813
Number of pages8
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 9 Oct 2017

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