Title :
A finite element beam propagation method for strongly guiding and longitudinally varying optical waveguides
Author :
Tsuji, Yasuhide ; Koshiba, Masanori
Author_Institution :
Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan
fDate :
2/1/1996 12:00:00 AM
Abstract :
A unified finite element beam propagation method is described for both TE and TM waves propagating in strongly guiding and longitudinally varying optical waveguides with magnetooptic materials. In order to avoid nonphysical reflections from the computational window edges, the transparent boundary condition is introduced for both polarizations. In order to show the validity and usefulness of this approach, numerical examples are presented for a directional coupler composed of two parallel identical waveguides, an S-bend, a Y-branching optical isolator, and a 4-ports optical circulator. The present algorithm is, to our knowledge, the first beam propagation method for modeling nonreciprocal magnetooptic components
Keywords :
finite element analysis; light polarisation; magneto-optical devices; optical circulators; optical directional couplers; optical isolators; optical waveguide theory; 4-ports optical circulator; S-bend; TE waves; TM waves; Y-branching optical isolator; beam propagation method; computational window edges; directional coupler; finite element beam propagation method; longitudinally varying optical waveguides; magnetooptic materials; nonphysical reflections; nonreciprocal magnetooptic components; parallel identical waveguides; strongly guiding optical waveguides; transparent boundary condition; Boundary conditions; Directional couplers; Finite element methods; Magnetic materials; Optical materials; Optical polarization; Optical propagation; Optical reflection; Optical waveguides; Tellurium;
Journal_Title :
Lightwave Technology, Journal of
