Polarization-insensitive two-mode (de)multiplexer using silicon-on-insulator-based Y-junction and multimode interference couplers

摘要

We propose a compact device that can (de)multiplex the two lowest polarization-insensitive modes (TE_0/TM_0 and TE_1/TM_1) by using silicon-on-insulator substrate. The proposed device consists of a Y-junction coupler and a 2 × 2 multimode interference coupler. We use both beam propagation method and effective index method to optimize and simulate this device. The simulation results show the advantages of our device, such as large wavelength range up to 95 nm, low insertion loss, large fabrication tolerances, and small footprint.