title: Modeling of holographic gratings in gradedindex photorefractive planar waveguides.
abstract: A numerical model is presented for the evaluation of the dielectric permittivity tensor changes as induced by guided modes during the formation of holographic gratings in arbitrary photorefractive graded-index planar waveguides. Comparisons among lithium niobate waveguides with different cuts and technology are shown.
authors.forename: Vittorio
authors.initials: V
authors.lastname: Passaro
authors.forename: Daniele
authors.initials: D
authors.lastname: Marseglia