Passive Active Resonant Coupler (PARC) Platform with Tapered passive Waveguide

摘要

There is a need for integrating various active and passive devices on a single substrate to increase the functionality of optical modules (1-4). One of the methods is to use regrowth for creating a low-loss passive waveguide butt-coupled to the active waveguide (1). Besides being a compelx technology, issues like low-loss coupling over multiple runs is still a challenge. A second technique used for integration is selective area growth (2). In general, this technology does not allow for freedom in the design of the various layer thickness and bandgaps of the integrated waveguides. Quantum well interdiffusion (3) has also been used for integration by altering the bandgaps of the waveguides but also suffers from a lack of freedom in waveguide design and in the selection of the proper bandgaps.