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

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...

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Bibliographic Details
Published in:arXiv.org 2019-03
Main Authors: Brahms, Christian, Austin, Dane R, Tani, Francesco, Johnson, Allan S, Garratt, Douglas, Travers, John C, Tisch, John W G, Russell, Philip St J, Marangos, Jon P
Format: Article
Language:English
Subjects:
Broadband
Computer simulation
Dielectric waveguides
Femtosecond pulses
Short pulses
Wave dispersion
Online Access:Get full text
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Summary: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 characterise tuneable 3fs 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1810.13227