Large-Scale Reconfigurable Integrated Circuits for Wideband Analog Photonic Computing

Photonic integrated circuits (PICs) have been a research hotspot in recent years. Programmable PICs that the advantages of versatility and reconfigurability can realize multiple functions through common structure especially popular. Leveraging on-chip couplers phase shifters, general-purpose waveguide meshes connected different topologies be manipulated at run-time support variety applications. However, current suffer from relatively low cell amount limited bandwidth. Here, we demonstrate reconfigurable photonic computing chip based on quadrilateral topology network, where typical analog functions, including temporal differentiation, integration, Hilbert transformation, are implemented with processing bandwidth up to 40 GHz. By configuring an optical path changing splitting ratio switches switched operation order tuned. This approach enables wideband large-scale cost-effective, ultra-compact architecture.