A hybrid SOI/SiN photonic platform for high-speed and temperature-insensitive CWDM optical transceivers

We introduce our 200 mm Si-SiN photonics platform for high-speed and energy-efficient optical transceiver. We present the fabrication process as well as wafer level characterizations in the O-band of Si and SiN photonic components such as waveguides, grating fiber couplers and Si-SiN interlayer adiabatic transitions. We demonstrate a low thermo-optic coefficient of the SiN layer and a large optical bandwidth for the hybrid Si-SiN photonic devices. This enhanced Si-SiN platform is of great importance for the realization of CWDM transceivers for which low temperature sensitivity and large bandwidth are needed.