title: Spectral shift of femtosecond pulses in nonlinear quadratic PPSLT Crystals.
abstract: Spectral blue- and red-shifts in a range of 100 nm are achieved by propagating 40 fs pulses with a 70 nm spectrum centered at 1450 nm in a 25-mm-long periodically poled stoichiometric lithium tantalate crystal. We show experimentally that these shifts, originating from a phase-mismatched second harmonic generation process under conditions of strong group velocity mismatch, can be efficiently controlled by acting on pulse intensity and phase-mismatch.
authors.forename: F
authors.initials: F
authors.lastname: Baronio
authors.forename: C
authors.initials: C
authors.lastname: De Angelis
authors.forename: M
authors.initials: M
authors.lastname: Marangoni
authors.forename: C
authors.initials: C
authors.lastname: Manzoni
authors.forename: R
authors.initials: R
authors.lastname: Ramponi
authors.forename: G
authors.initials: G
authors.lastname: Cerullo