Uniform Monolithically Integrated Silicon Photonics Optical Receiver Chip for CWDM4

We proposed a monolithic high-speed and high-sensitivity optical receiver chip for CWDM4. It integrates an edge coupler, 4-channel add-drop optical filters based on cascaded CMWGs with gradually changing triangular tooth waveguide width and Ge/Si APDs. This design is fabricated by commercial $180-\mathrm{nm}$ SOI CMOS technology, and exhibited outstanding uniformity.