Title :
Modal analysis of quasi-guided waveguides by the finite element method with spatial transformations
Author :
Passaro, Angelo ; Franco, Marcos A R ; Machado, José M. ; Cardoso, José R.
Author_Institution :
Div. of Appl. Phys., Centro Tecnico Aeroespacial, Brazil
Abstract :
This work presents an approach for the computation of resonant modes in quasi-guided waveguides by the finite element method. In this approach, a spatial transformation maps a large external domain, surrounding the guide core, onto a smaller domain containing the waveguide region. Only a few modifications of conventional finite element codes are required to apply the spatial transformation scheme, which can be used in the presence of material nonhomogeneities as well as anisotropies. A weakly guiding optical waveguide is analysed by this scheme and the modal solutions are compared to those obtained by the infinite element and the boundary impedance condition techniques
Keywords :
finite element analysis; optical waveguide theory; boundary impedance condition techniques; finite element method; infinite element; large external domain; material nonhomogeneities; modal analysis; quasi-guided waveguides; resonant modes; spatial transformations; weakly guiding optical waveguide; Anisotropic magnetoresistance; Dielectric substrates; Electromagnetic waveguides; Finite element methods; Modal analysis; Optical refraction; Optical sensors; Optical variables control; Optical waveguides; Transmission line matrix methods;
Conference_Titel :
Microwave and Optoelectronics Conference, 1999. SBMO/IEEE MTT-S, APS and LEOS - IMOC '99. International
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-5807-4
DOI :
10.1109/IMOC.1999.867070
