A 112 Gb/s PAM4 Transmitter with Silicon Photonics Microring Modulator and CMOS Driver

We demonstrate a 112 Gb/s PAM4 transmitter using silicon photonics microring modulator, on-chip laser and co-packaged CMOS driver. Measured TDECQ is <;0.7 dB from 30°C to 60°C with on-chip nonlinear feed-forward equalization enabled.