title: Far-detuned mid-infrared frequency conversion via normal dispersion modulation instability in chalcogenide microwires.
abstract: We report the observation of modulation instability (MI) in the mid-infrared (mid-IR) spectral region by pumping a hybrid polymer-chalcogenide optical microwire with a femtosecond optical parametric oscillator operating at 2.6 μm. It is further shown that this MI occurs in the normal dispersion regime through negative fourth-order dispersion and leads to far-detuned parametric frequency conversion at 2 and 3.5 μm, despite the presence of a strong absorption band around 2.8 μm. Stochastic nonlinear Schrödinger equation simulations of mid-IR MI are in excellent agreement with experiments.
authors.forename: Thomas
authors.initials: T
authors.lastname: Godin
authors.forename: Yves
authors.initials: Y
authors.lastname: Combes
authors.forename: Raja
authors.initials: R
authors.lastname: Ahmad
authors.forename: Martin
authors.initials: M
authors.lastname: Rochette
authors.forename: Thibaut
authors.initials: T
authors.lastname: Sylvestre
authors.forename: John M
authors.initials: JM
authors.lastname: Dudley