Optimization Design of Efficient Broadband Bi-Layer Grating Couplers for a Silicon Nitride-on-Silicon Foundry Platform

摘要

We propose and validate an optimization-based design procedure for bi-layer grating couplers in a silicon nitride-on-silicon photonic platform. Peak fiber-to-chip coupling efficiency of -2.1dB and a 1-dB bandwidth of 72nm were achieved in the O-band.