title: Effects of anisotropic and curvature losses on the operation of geodesic lenses in Ti:Linbo(3).
abstract: The effects of curvature and anisotropy (leaky-mode) losses on the performance of geodesic lenses in Ti-diffused waveguides in LiNbO(3) are examined. A model for the lenses is developed that is equivalent to the usual Fraunhofer diffraction theory, modified to account for the path-dependent losses. Numerical calculations show that the curvature losses are dominant and require fabrication of waveguides having well-confined fundamental modes. Higher-order modes are effectively attenuated by the lenses. The leaky-mode losses have the beneficial effect of reducing the side-lobe intensity in the focal plane.
authors.forename: D W
authors.initials: DW
authors.lastname: Vahey
authors.forename: R P
authors.initials: RP
authors.lastname: Kenan
authors.forename: W K
authors.initials: WK
authors.lastname: Burns