Author(s): David Gauthier, Primož Rebernik Ribič, Giovanni De Ninno, Enrico Allaria, Paolo Cinquegrana, Miltcho Bojanov Danailov, Alexander Demidovich, Eugenio Ferrari, and Luca Giannessi
Frequency domain interferometry is used to generate two sequential phase-locked pulses from a free-electron laser in the X-ray to UV domain.
[Phys. Rev. Lett. 116, 024801] Published Thu Jan 14, 2016