Scalar finite element analysis of electrooptic modulation in diffused channel waveguides and poled waveguides in polymer thin films.
Electrooptic modulation with diffused channel waveguides is analyzed by utilizing the approximate scalar finite element approach developed for anisotropic asymmetric slab waveguides. The interaction of the applied electric fields with the optical fields is calculated over the 2-D finite element mesh, and the direct calculation of the waveguide eigenmodes provides the electrooptic changes in the propagation wavenumbers. Applications of this simplified finite element approach to arbitrary index profiles and fields are illustrated for both titanium-indiffused LiNbO(3) and poled waveguides in polymer thin films.
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Mustacich