Semi-analytical modeling of microring resonators with distributed Bragg reflectors

Abstract

A semi-analytical method for fast simulation of microring resonators with distributed Bragg reflectors (DBR-MRR) is presented. Under the low loss condition, the structure exhibits a spectral response similar to that of a sampled-grating distributed Bragg reflector (SGDBR). However, the DBR-MRR can achieve higher reflectivity with significantly fewer gratings due to multiple reflection encounters with the same DBR gratings.

A microring resonator with an integrated Bragg grating: a compact replacement for a sampled grating distributed Bragg reflector

“…It consists of a conventional microring coupled to a bus waveguide and a DBR which is placed on part of the ring waveguide. For the analysis, we separate the structure into two parts: the ring and the DBR (Kang and Goddard 2009). For simplicity, we assume that the grating is placed symmetrically along the ring's circumference.…”