Vol. 43, Issue 2, pp. 271-277 (2013)

Abstract

In this paper, an improved effective index method (EIM) for designing planar multimode waveguides on the silicon-on-insulator (SOI) platform is presented. The proposed method predicts the evolution of the fields more accurately than the conventional effective index method. This improved method is particularly suited to the design of multimode interference (MMI) couplers.