Hybrid Photonic Integration for Optical Switches

This invited paper reviews the state-of-the-art hybrid photonic integration technologies for optical switches, with a particular emphasis on the advantages of integrating diverse materials, notably indium phosphide and silicon nitride. We highlight progress in various aspects of hybrid photonic integration including achieving high-port-count fiber-chip coupling, facilitating high-density electrical interfaces, and enabling on-chip temperature sensing and control. This paper also provides insights into the potential of hybrid photonic integration in shaping the future of optical switches.