CMOS 160Gbps 4PAM Optical Receiver Front-End 

Demo of optical reception up to 160-Gb/s/λ PAM-4 and 90-Gb/s/λ NRZ signalling with a prototype custom-designed TIA in 16-nm FinFET CMOS co-packaged with a commercial photodiode. The DSP-based feed-forward and decision-feedback equalization requirements of 2.5D co-packaged CMOS optical receivers are explored. Presented at ECOC 2022.