title: Designer femtosecond pulse shaping using grating-engineered quasi-phase-matching in lithium niobate.
abstract: The generation of tailored femtosecond pulses with fully engineered intensity and phase profiles is demonstrated using second-harmonic generation of an Er:fiber laser in an aperiodically poled lithium niobate crystal in the undepleted pump regime. Second-harmonic pulse shapes, including Gaussian, stepped, square, and multiple pulses have been characterized using cross-correlation frequency-resolved optical gating and have been shown to agree well with theory.
authors.affiliation: Ultrafast Optics Group, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK. lwk1@hw.ac.uk
authors.forename: Ukasz
authors.initials: U
authors.lastname: Kornaszewski
authors.forename: Markus
authors.initials: M
authors.lastname: Kohler
authors.forename: Usman K
authors.initials: UK
authors.lastname: Sapaev
authors.forename: Derryck T
authors.initials: DT
authors.lastname: Reid