title: High-average-power femtosecond pulse generation in the blue using BiB3O6.
abstract: Efficient generation of tunable femtosecond pulses in the blue is reported in the nonlinear crystal BiB3O6. By use of fundamental pulses from a mode-locked Ti:sapphire laser at 76 MHz, single-pass second-harmonic average powers of as much as 830 mW have been generated at 50% conversion efficiency, and a tunable range of 375-435 nm in the blue is demonstrated. Temporal measurements using cross correlation of the fundamental and second-harmonic pulses in a 100-microm-thick beta-BaB2O4 crystal result in blue pulse durations of 220 fs for 130-fs fundamental pulses. Direct experimental comparison with beta-BaB2O4 confirms the superior performance BiB3O6 for second-harmonic generation of femtosecond pulses.
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Jordi Girona 29, Nexus II, Barcelona 08034, Spain. masood.ghotbi@upc.es
authors.forename: M
authors.initials: M
authors.lastname: Ghotbi
authors.forename: M
authors.initials: M
authors.lastname: Ebrahim-Zadeh
authors.forename: A
authors.initials: A
authors.lastname: Majchrowski
authors.forename: E
authors.initials: E
authors.lastname: Michalski
authors.forename: I V
authors.initials: IV
authors.lastname: Kityk