An 8×256 Gbps Silicon Photonic DWDM Transmitter with Thermally Stable Microring Modulators

We demonstrate an $8 \times 256$ Gbps silicon photonic DWDM transmitter utilizing $\gt67 \text{GHz}$ microring modulators and 1.8 Vpp driving signals. An optoelectronic closed-loop feedback system for wavelength tuning compensates for process variations and temperature fluctuations. OCIS codes: (200.4650) Optical interconnects; (130.0130) Integrated optics; (130.4110) Modulators.