title: Microjoule-level, tunable sub-10 fs UV pulses by broadband sum-frequency generation.
abstract: We introduce a scheme for the generation of tunable few-optical-cycle UV pulses based on sum-frequency generation between a broadband visible pulse and a narrowband pulse ranging from the visible to the near-IR. This configuration generates broadband UV pulses tunable from 0.3 to 0.4 μm, with energy up to 1.5 μJ. By exploiting nonlinear phase transfer, transform-limited pulse durations are achieved. Full characterization of the UV pulse spectral phase is obtained by two-dimensional spectral shearing interferometry, which is here extended to the UV spectral range. We demonstrate clean 8.4 fs UV pulses.
authors: Rocio Borrego
authors: RB
authors: Varillas
authors: Alessia
authors: A
authors: Candeo
authors: Daniele
authors: D
authors: Viola
authors: Marco
authors: M
authors: Garavelli
authors: Sandro
authors: S
authors: De Silvestri
authors: Giulio
authors: G
authors: Cerullo
authors: Cristian
authors: C
authors: Manzoni
mesh_terms: D004560:Electricity; D007368:Interferometry / Q000379:methods*; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D055096:Optical Devices; D055620:Optical Phenomena; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays