title: Numerical investigation of mode coupling in sinusoidally modulated GRIN planar waveguides.
abstract: We study mode coupling in planar 2-D graded-index optical waveguides with the beam propagation method. In particular we examine the effect of periodic radial deformations along the axis of a parabolic refractiveindex waveguide and compare our results to the results of perturbation theory.
authors.forename: D
authors.initials: D
authors.lastname: Yevick
authors.forename: P
authors.initials: P
authors.lastname: Danielsen