title: Low-threshold femtosecond optical parametric oscillator based on chirped-pulse frequency conversion.
abstract: We report what is to our knowledge the first demonstration of a femtosecond optical parametric oscillator based on chirped-pulse frequency conversion in a long crystal of aperiodically poled potassium titanyl phosphate. The minimum pump threshold power was 15 mW, and a signal slope efficiency of 35% was achieved. Continuous tuning from 1190 to 1450 nm was obtained for an average pump power of 800 mW.
authors.affiliation: Ultrafast Optics Group, Department of Physics, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK.
authors.forename: K A
authors.initials: KA
authors.lastname: Tillman
authors.forename: D T
authors.initials: DT
authors.lastname: Reid
authors.forename: D
authors.initials: D
authors.lastname: Artigas
authors.forename: J
authors.initials: J
authors.lastname: Hellström
authors.forename: V
authors.initials: V
authors.lastname: Pasiskevicius
authors.forename: F
authors.initials: F
authors.lastname: Laurell