期刊
OPTICS LETTERS
卷 44, 期 4, 页码 731-734出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.000731
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资金
- European Research Council (ERC) [ASTEX 290467, HISOL 679649]
- Engineering and Physical Sciences Research Council (EPSRC) [EP/I032517/1, EP/N018680/1, EP/R019509/1]
- Engineering and Physical Sciences Research Council Doctoral Training Account
- EPSRC [EP/R019509/1, EP/N018680/1, EP/I032517/1] Funding Source: UKRI
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. (C) 2019 Optical Society of America
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