Advanced Microring Photonic Filter Design

Abstract

This chapter reviews the development of high-order photonic filters based on coupled microring resonators for optical spectral engineering applications. Advanced microring filter architectures capable of realizing general infinite impulse response optical transfer functions with finite transmission zeros are presented. Techniques for the analysis and exact synthesis of these devices to achieve a prescribed filter response are also described in detail. Examples of advanced optical filter designs such as high-order pseudo-elliptic filters and filters with maximally flat group delay are given to illustrate the potential applications of these general microring architectures in optical spectral engineering.