Behavioral Model of Silicon Photonics Microring with Unequal Ring and Bus Widths

Microring resonators (MRR) with non-identical ring and bus waveguide widths are easier to fabricate as they allow for larger gaps. For effective design exploration, we propose a new behavioral model for the directional coupler of an MRR with non-identical ring and bus widths, which can be used to calculate the MRR design performace. The analysis shows that the proposed modeling technique matches the corresponding 3D FDTD simulations well.