64-QAM Self-Coherent Transmission Using Symmetric Silicon Photonic Stokes-Vector Receiver

We propose a robust silicon photonic Stokes-vector receiver based on fully symmetric waveguides without a mode-selective directional coupler. By using a fabricated receiver, we experimentally demonstrate 30-Gb/s 64-QAM self-coherent transmission over a 25-km single-mode fiber. © 2022 The Author(s)