ACCURATE ANALYSIS OF MMI DEVICES WITH 2-DIMENSIONAL CONFINEMENT

The accurate analysis of multinode interference (MMI) devices with two -dimensional (2-D) confinement has been demonstrated by using the leas t squares boundary residual (LSBR) method. Accurate modal propagation constants and spatial field profiles in the MMI section are obtained b y using the vector H-field based finite element method. The accurate c alculation of the excited modal coefficients is achieved by using the LSBR, which satisfies the continuity of the transverse field component s more rigorously than using simple overlap integrals.