Silicon photonic filters

Abstract Photonic filters are playing a very important role in many applications, including optical interconnects as well as optical sensing. As silicon photonics has provided a very attractive platform to realize the high integrated intensity and low cost, various silicon‐based on‐chip photonic filters have been proposed and demonstrated in the past decade. In this paper, we give a review of recent progresses of silicon photonic filters based on different structures, including Mach‐Zehnder interferometers, microring resonators, waveguide Bragg grating, and arrayed‐waveguide gratings.