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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper PD_A_7

High Average-Power and Energy Deep-Ultraviolet Femtosecond Pulse Source Driven by 10 MHz Fibre-Laser

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Abstract

Fibre lasers have created a revolution in ultrafast pulse sources, due to their high average-power and high repetition-rates, with commercial 300 fs pulse systems routinely delivering > 20 µJ and > 20 W. However, apart from discreet harmonic schemes, short-wavelength frequency tunability is lacking, and producing shorter pulse durations requires additional compression stages. Gas-filled, hollow-core kagomé photonic-crystal fibres (kagomé-PCF) are ideal nonlinear compressors for these systems [1], and have enabled the generation of < 10 fs pulses with 18 W average power [2]. Here we show that they can additionally be used to generate up to 70 nJ deep-UV pulses, tunable between at least 270 nm to 320 nm, at high repetition-rate, and hence average-power—exceeding 693 mW. This unique source will have a wide range of applications, to for example, angle-resolved photoemission spectroscopy [3] or ultrafast pump-probe measurements of biological molecules.

© 2015 IEEE

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