Title :
Rigorous analysis of coupling between laser and passive waveguide in multilayer slab waveguide
Author :
Hirayama, Koichi ; Koshiba, Masanori
Author_Institution :
Dept. of Electron. Eng., Kitami Inst. of Technol., Japan
fDate :
8/1/1993 12:00:00 AM
Abstract :
An approach that combines the finite-element and boundary-element methods (FEM/BEM) is extended to the analysis of arbitrarily shaped discontinuities in a multilayer slab waveguide. Here all the eigenmodes, namely, guided modes, substrate radiation modes, and substrate-cover radiation modes, are taken into account and are constructed by an extended matrix method. Computed results are given for the rigorous analysis of the coupling between a five-or six-layer laser and a four-layer passive waveguide in a monolithically integrated circuit. Some of the results are for multimode incidence. Since the coupling is one of the most important discontinuity problems in practice, this result confirms the usefulness of the approach
Keywords :
boundary-elements methods; eigenvalues and eigenfunctions; finite element analysis; integrated optics; matrix algebra; optical couplers; optical films; optical waveguide theory; arbitrarily shaped discontinuities; boundary-element methods; discontinuity problems; eigenmodes; extended matrix method; fibre-layer laser; finite element method; four-layer passive waveguide; guided modes; monolithically integrated circuit; multilayer slab waveguide; multimode incidence; passive waveguide; rigorous analysis; six-layer laser; substrate radiation modes; substrate-cover radiation modes; waveguide laser coupling; Circuit analysis computing; Coupling circuits; Finite element methods; Laser modes; Nonhomogeneous media; Optical coupling; Slabs; Transmission line matrix methods; Waveguide discontinuities; Waveguide lasers;
Journal_Title :
Lightwave Technology, Journal of
