Microring photodetection in silicon photonic integrated circuits

A tunable microring resonator (MRR) with active p- and n-type doped regions is used for photodetection in photonic integrated circuits. We compare results of this device with that of an integrated Ge-photodetector (PD) connected to the MRR drop-port. A circuit containing both devices was designed and experimentally characterized. This device is an attractive alternative for applications such as a thermal compensation building block as well as sensor applications.