Presentation Information
[C-15-28]A Scattering-operator-based fintie element method using the slowly varying envelope approximation for efficient optical waveguide analysis
◎Haruki Oshida1, Keita Morimoto1, Akito Iguchi2, Yasuhide Tsuji2 (1. University of Hyogo, 2. Muroran Institute of Technology)
Keywords:
Finite element method,Optical waveguide,Scattering operator,Numerical analysis methods
The slowly varying envelope approximation finite element method (SVEA-FEM) enables efficient optical waveguide analysis by decomposing the electromagnetic field into an envelope component and a steady propagation term. However, because SVEA-FEM assumes forward propagation, it is inherently difficult to analyze discontinuous structures involving reflections. In this study, a bidirectional SVEA-FEM based on the scattering-operator method previously proposed by the authors is developed. Furthermore, the reference refractive index is updated along the propagation direction to improve the analysis accuracy. The proposed method is evaluated through comparison with the conventional finite element method (FEM), and its convergence characteristics and analysis accuracy are investigated.