Optimization of reflection coefficient in ring resonator add/drop filters

Abstract

SummaryA general model that combines the effect of controllable reflectivity resulting from semi‐periodic gratings with the transfer function of a single ring resonator add/drop filter is derived. An optimization approach based on minimizing the least squared error is performed to calculate parameters that increase the crosstalk suppression bandwidth of a rough‐walled ring resonator. The resulting design has a 28‐GHz crosstalk suppression bandwidth. Copyright © 2015 John Wiley & Sons, Ltd.