Ultrafast optics in gas-filled fibers

Abstract

Gas-filled hollow-core fibres, both with and without microstructure, provide a versatile platform for ultrafast nonlinear optics in gases at high intensity and over long interaction lengths, and have enabled a new class of optical light sources to be created. These include bright few-femtosecond pulse sources tuneable across the far-ultraviolet (100-300 nm), ultra-flat supercontinuum generation spanning from the deep ultraviolet to infrared with high spectral power density, efficient frequency-conversion through four-wave mixing, and novel approaches to extreme pulse compression to the sub-cycle regime. In this talk we will review this technology and describe our recent progress.