Title :
Modal analysis of anisotropic diffused-channel waveguide by a scalar finite element method
Author :
Franco, Marcos A R ; Passaro, Angelo ; Neto, Francisco Sircilli ; Cardoso, Jose R. ; Machado, Jose M.
Author_Institution :
Centro Tecnico Aerosp., Sao Jose dos Campos, Brazil
fDate :
9/1/1998 12:00:00 AM
Abstract :
A procedure to model optical diffused-channel waveguides is presented in this work. The dielectric waveguides present anisotropic refractive indexes which are calculated from the proton concentration. The proton concentration inside the channel is calculated by the anisotropic 2D-linear diffusion equation and converted to the refractive indexes using mathematical relations obtained from experimental data. The arbitrary refractive index profile is modeled by a nodal expansion in the base functions. The TE and TM-like propagation properties (effective index) and the electromagnetic fields for well-annealed proton-exchanged (APE) LiNbO3 waveguides are computed by the finite element method
Keywords :
finite element analysis; lithium compounds; optical waveguide theory; refractive index; 2D linear diffusion equation; LiNbO3; anisotropic refractive index; annealed proton exchanged LiNbO3 waveguide; dielectric waveguide; electromagnetic field; modal analysis; optical diffused channel waveguide; proton concentration; scalar finite element method; Anisotropic magnetoresistance; Dielectrics; Electromagnetic waveguides; Geometrical optics; Modal analysis; Optical refraction; Optical variables control; Optical waveguides; Protons; Refractive index;
Journal_Title :
Magnetics, IEEE Transactions on
