Silicon Photonics Optical Mode Division Multiplexing integrated with internal modulators

Abstract

A space mode division multiplexing (SDM) integrated with four Si-Ge electro-absorption modulator (EAM) has been demonstrated in a compact Si photonics chip. Four modulated optical modes through a 2-dimensional grating coupler can be coupled together into a fiber with $\gt 2.7$ dB extinction ratio in each mode.