Reconfigurable RF Filter Based on Cascaded Microring Resonators

To meet the requirement of radio frequency signal processing tasks among various bands, here we have demonstrated a reconfigurable microwave photonic bandpass filter by flipping optical notch spectrum cascaded microring resonator (MRR) pool chip through phase modulation. We experimentally characterize MRR on Si3N4 platform and evaluate system performance established (MPF). In system, center can be tuned within 5.8--18.2 GHz bandwidth 2.1--3.5 GHz. particular, MPF features response with shape factor ∼2.2. With advantages reconfigurability good factor, RF shows potential application in future software-defined frontends.