title: X - waves in nonlinear normally dispersive waveguide arrays.
abstract: We theoretically demonstrate that optical discrete X-waves are possible in normally dispersive nonlinear waveguide arrays. We show that such X-waves can be effectively excited for a wide range of initial conditions and in certain occasions can be generated in cascade. The possibility of observing this family of waves in AlGaAs array systems is investigated in terms of pertinent examples.
authors.forename: Sotiris
authors.initials: S
authors.lastname: Droulias
authors.forename: Kyriakos
authors.initials: K
authors.lastname: Hizanidis
authors.forename: Joachim
authors.initials: J
authors.lastname: Meier
authors.forename: Demetrios
authors.initials: D
authors.lastname: Christodoulides