Multimode interference power divider design optimization using simulation-based surrogate models and space mapping

Fast design of multimode interference (MMI) power dividers for integrated optics circuits is discussed. Our approach exploits surrogate models built from discrete electromagnetic (EM) simulations. These models - after a suitable correction and through proper handling - serve as computationally efficient predictors in simulation driven optimization of high index contrast components. The operation and performance of the proposed technique is demonstrated with design of compact power dividers of different power splitting ratios. The designed power dividers are supposed to operate equally well for two polarizations.