Direct characterization of tuneable few-femtosecond dispersive-wave pulses in the deep UV

Abstract

Dispersive wave emission (DWE) in gas-filled hollow-core dielectric waveguides is a promising source of tuneable coherent and broadband radiation, but so far the generation of few-femtosecond pulses using this technique has not been demonstrated. Using in-vacuum frequency-resolved optical gating, we directly characterize tuneable 3 fs pulses in the deep ultraviolet generated via DWE. Through numerical simulations, we identify that the use of a pressure gradient in the waveguide is critical for the generation of short pulses.

Publication
Opt. Lett.
Christian Brahms
Christian Brahms
Research Fellow
John C. Travers
John C. Travers
Professor of Physics