Enhancing Spatial Sampling Resolution Using Multi-Port Grating Couplers

In this paper, we introduce a multi-port grating coupler design aimed at enhancing the fill factor and overcoming routing limitations inherent in grating coupler arrays within photonic integrated circuits (PICs). Our proposed grating couplers, when tiled, offer a new approach to designing grating coupler arrays that more efficiently couple higher-order modes to a fundamental TE/TM mode.