Title :
A wide-angle finite-element beam propagation method
Author :
Koshiba, Masanori ; Tsuji, Yasuhide
Author_Institution :
Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan
Abstract :
A wide-angle finite-element beam propagation method based on the Pade approximation is developed. Considerable improvement in accuracy over the paraxial approximation is achieved with virtually no additional computation. In the present algorithm, the quadratic element, transparent boundary condition, adaptive reference index, and adaptive grid are effectively utilized.
Keywords :
approximation theory; boundary-value problems; finite element analysis; optical planar waveguides; optical waveguide theory; refractive index; Pade approximation; adaptive grid; adaptive reference index; algorithm; optical planar waveguides; optical waveguide theory; paraxial approximation; quadratic element; transparent boundary condition; wide-angle finite-element beam propagation method; Boundary conditions; Equations; Finite element methods; Optical planar waveguides; Optical propagation; Optical refraction; Optical variables control; Optical waveguides; Planar waveguides; Transmission line matrix methods;
Journal_Title :
Photonics Technology Letters, IEEE
