Optical phase shifter design for single and multi-mode waveguide configurations

Abstract In this paper, we introduce simple design equations for optical phase shifter configurations on both single mode and multimode platforms. The are based approximate analytical expressions describing the shift (difference) between two waveguides, one is considered as reference guide second shifter. Different layout geometrical have been studied: step width linear tapering waveguide. validity of formula tested using standard Beam Propagation Method BPM. obtained results in good agreement with numerical calculations allow these closed form such shifters.