Nanowerk  March 19, 2024 Current implementations of optical frequency division (OFD) require multiple lasers, with space- and energy-consuming optical stabilization and electronic feedback components, resulting in device footprints incompatible with integration into a compact and robust photonic platform. A team of researchers in the US (industry, Columbia University) demonstrated all-optical OFD on a photonic chip by synchronizing two distinct dynamical states of Kerr microresonators pumped by a single continuous-wave laser. The inherent stability of the terahertz beat frequency was transferred to a microwave frequency of a Kerr soliton comb, and synchronized via a coupling waveguide without the need for electronic […]