title: Focus wave modes in optical parametric generators.
abstract: It is shown that in the paraxial approximation the conditions for noncollinear phase matching for three-wave parametric interaction in a nonlinear crystal coincide with the conditions for generation of focus wave modes. As a result, the creation of broadband localized optical fields (pulsed beams without diffraction and dispersion spreading) inside the crystals of parametric generators is feasible.
authors.forename: S
authors.initials: S
authors.lastname: Orlov
authors.forename: A
authors.initials: A
authors.lastname: Piskarskas
authors.forename: A
authors.initials: A
authors.lastname: Stabinis