A Refined Model for the Analysis of the Coupling Behavior of Photonic Millimeter Wave Beam-Splitter-Type Couplers

摘要

Based on a combined approach of effective dielectric constant (EDC) method and geometrical optics a refined theory of the coupling behavior of photonic millimeter wave beam-splitter-type couplers (PBSCs) in dielectric and image guide technology is presented, taking into account the contribution of the individual partial waves of E_(mn)~x- and E_(mn)~y-modes and the limited confinement of mode power inside the dielectric strips of the waveguides. Furthermore, a modified type of PBSC is proposed which cannot be just optically controlled but is virtually optically induced via appropriate illumination of a semiconductor waveguide junction. In this case it is shown that under the condition of low-level excitation the computation can be simplified for some type of semiconductor (e. g. GaAs) and approximate calculations for the coupling behavior are presented.