Mode Coupling Analysis for a Mode Selective Coupler Using the Supermode Theory

In this paper, the mode selective coupler (MSC) is analyzed using supermode theory. It shown that all characteristic parameters of MSC can be obtained propagation constants supermodes supported by structure. Simulation results show calculated theory match well with those traditional coupled (CMT) near phase matching point practice, common finite element software directly, avoiding complex double integral in CMT. This analysis based on gives a deeper insight into characteristics MSC, providing fast and accurate method for MSCs, which helpful their design, fabrication applications.