A 4×25-Gbps Monolithically Integrated Si Photonic WDM Transmitter with Ring Modulators

We demonstrate a 100-Gbps (4×25-Gbps) Si Photonic WDM transmitter containing monolithically integrated Si ring modulators (RMs) and BiCMOS driving circuits. Our transmitter is designed with the large-signal circuit model for the Si RM, which allows easy and accurate optimization of the entire WDM transmitter.