Mauro Trovò

TL;DR: The generation of two-colour extreme ultraviolet pulses of controlled wavelengths, intensity and timing by seeding of high-gain harmonic generation free-electron laser with multiple independent laser pulses is reported.

TL;DR: In this article, the authors report the first demonstration of the full output polarization capabilities of FERMI FEL-1 in a campaign of experiments where the wavelength and nominal polarization are set to a series of representative values, and the polarization of the emitted intense pulses is thoroughly characterized by three independent instruments and methods.

TL;DR: In this article, the echo-enabled harmonic generation (EEHG) configuration was used to generate stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm.

TL;DR: The experimental implementation of chirped pulse amplification on a seeded free-electron laser in the extreme-ultraviolet is presented, paving the way to the generation of fully coherent sub-femtosecond gigawatt pulses in the water window.

TL;DR: The experimental demonstration of a method for generating two spectrally and temporally separated pulses by an externally seeded, single-pass free-electron laser operating in the extreme-ultraviolet spectral range is presented.