Thermal-tunable microring resonator-based WDM optical receiver for on-chip optical interconnect

We demonstrate a multiple-channel optical receiver integrating multiple thermally tunable microring resonator as the WDM demultiplexing and Ge photodetector for light detection. We fabricated 4-channel and 10-channel of such WDM receivers using CMOS-compatible fabrication process. We show that with the thermal tunability, the channel wavelengths can be adjusted to align with the selected channel grid. Proof-of-principle demonstrations using 4-channel receiver shows up to 160 Gbit/s date transmissions with high data quality.