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

• DOI: 10.1038/s41467-017-00943-4
• Publication Date: 2017-10-04T06:47:24Z
• Authors: F. Köttig; D. Novoa; F. Tani; M. C. Günendi; M. Cassataro; J. C. Travers; P. St.J. Russell
• Keywords: Supercontinuum; Transient (computer programming); Attosecond; Crystal (programming language)

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