%0 Journal Article
%T High-gain harmonic-generation free-electron laser seeded by harmonics generated in gas
%+ Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA)
%+ Synchrotron SOLEIL (SSOLEIL)
%+ Laboratori Nazionali di Frascati (LNF)
%+ Service de Physique et de Chimie des Surfaces et Interfaces (SPCSI)
%+ Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata (INFN, Sezione di Roma Tor Vergata)
%+ CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN)
%+ Laboratoire d'optique appliquée (LOA)
%+ Università degli Studi di Roma "La Sapienza" = Sapienza University [Rome] (UNIROMA)
%+ ENEA C.R. Frascati, Via E. Fermi, 45, 00044 Frascati, Roma, Italy
%+ Università degli Studi di Milano = University of Milan (UNIMI)
%+ INFN-Mi, Via Celoria, 16 20133 Milano, Italy
%+ Istituto di Struttura della Materia (CNR-ISM)
%+ Paul Scherrer Institute (PSI)
%A Labat, M.
%A Bellaveglia, M.
%A Bougeard, M.
%A Carré, B.
%A Ciocci, F.
%A Chiadroni, E.
%A Cianchi, A.
%A Couprie, M.E.
%A Cultrera, L.
%A del Franco, M.
%A Di Pirro, G.
%A Drago, A.
%A Ferrario, M.
%A Filippetto, D.
%A Frassetto, F.
%A Gallo, A.
%A Garzella, D.
%A Gatti, G.
%A Giannessi, L.
%A Lambert, Guillaume
%A Mostacci, A.
%A Petralia, A.
%A Petrillo, V.
%A Poletto, L.
%A Quattromini, M.
%A Rau, J.V.
%A Ronsivalle, C.
%A Sabia, E.
%A Serluca, M.
%A Spassovsky, I.
%A Surrenti, V.
%A Vaccarezza, C.
%A Vicario, C.
%< avec comité de lecture
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 107
%N 22
%P -
%8 2011
%D 2011
%R 10.1103/physrevlett.107.224801
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]Journal articles
%X The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics generated in gas. The third harmonics of a Ti:sapphire laser, generated in a gas cell, has been amplified and up-converted to its second harmonic (?rad=133nm) in a FEL cascaded configuration based on a variable number of modulators and radiators. We studied the transition between coherent harmonic generation and superradiant regime, optimizing the laser performances with respect to the number of modulators and radiators. © 2011 American Physical Society.
%G English
%L hal-00964902
%U https://hal-ensta-paris.archives-ouvertes.fr/hal-00964902
%~ CEA
%~ X
%~ ENSTA
%~ CNRS
%~ X-LOA
%~ X-DEP
%~ X-DEP-PHYS
%~ ENSTA_LOA
%~ SPCSI
%~ SYNCHROTRON-SOLEIL
%~ IRAMIS
%~ GS-PHYSIQUE