High-Order-Harmonic Generation and Superradiance in a Seeded Free-Electron Laser

作者：Giannessi L^*; Artioli M; Bellaveglia M; Briquez F; Chiadroni E; Cianchi A; Couprie M E; Dattoli G; Di Palma E; Di Pirro G; Ferrario M; Filippetto D; Frassetto F; Gatti G; Labat M; Marcus G; Mostacci A; Petralia A; Petrillo V; Poletto L; Quattromini M; Rau J V; Rosenzweig J; Sabia E; Serluca M; Spassovsky I; Surrenti V

来源：Physical Review Letters, 2012, 108(16): 164801.

DOI：10.1103/PhysRevLett.108.164801

Higher order harmonic generation in a free-electron laser amplifier operating in the superradiant regime [R. H. Dicke, Phys. Rev. 93, 99 (1954).] has been observed. Superradiance has been induced by seeding a single-pass amplifier with the second harmonic of a Ti:sapphire laser, generated in a beta-Barium borate crystal, at seed intensities comparable to the free-electron laser saturation intensity. Pulse energy and spectral distributions of the harmonics up to the 11th order have been measured and compared with simulations.

• 出版日期2012-4-19