Since 2009, we have been collaborating with the Laboratory of Applied Optics (LOA), the Trieste Synchrotron, and the University of Nova Gorica on R&D activities related to the new FERMI@ELETTRA injected XUV LEL. Following preparatory work on the LUCA laser at LIDYL, we (SLIC, LOA, NOVA GORICA, and ENEA-FRASCATI) characterized the spatial coherence properties of the ELETTRA LEL and studied, both experimentally and numerically, the effects induced by the chirp of the electron beam and the injection laser [B. Mahieu et al., Applied Physics B: Lasers and Optics 108 (1), 43–49. (2012)] [E. Allaria et al., Nature Photonics 6 (10), 699–704 (2012)].
More recently, an experiment conducted at ELETTRA in collaboration with the Trieste Synchrotron, the Laboratory of Applied Optics, and the Institute of Molecular Sciences in Orsay (CNRS-INP) demonstrated that the duration of pulses produced at 37.3 nm by the LEL, driven by an external 261-nm laser, could be significantly reduced (from 143 fs to 50 fs in this case) when the frequency-shifted pulse scheme is employed.
Reference:
Full tunability of laser femtosecond high-order harmonics in the ultraviolet spectral range
B. Mahieu, S. Coraggia, C. Callegari, M. Coreno, G. De Ninno, M. Devetta, F. Frassetto, D. Garzella, M. Negro, C. Spezzani, C. Vozzi, S. Stagira & L. Poletto, Applied Physics B 108 (2012) 43–49.