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arXiv · 1810.13227

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

Christian Brahms·Dane R. Austin·Francesco Tani·Allan S. Johnson·Douglas Garratt·John C. Travers·John W. G. Tisch·Philip St. J. Russell·Jon P. Marangos
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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 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.

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Christian Brahms, Dane R. Austin, Francesco Tani, Allan S. Johnson, Douglas Garratt, John C. Travers, John W. G. Tisch, Philip St. J. Russell, Jon P. Marangos. 2019-03-04. Direct characterisation of tuneable few-femtosecond dispersive-wave pulses in the deep UV. https://doi.org/10.1364/ol.44.000731

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