In this paper, we introduce for the first time a novel 2 × 2 multimode switch design and demonstrate in the proof-of-concept. The device composes of four Y-multijunctions and 2 × 2 multimode interference coupler using silicon-on-insulator material with four . Herein reported is an integrated wavelength-division multiplexing (WDM)-compatible multimode optical switching system-on-chip (SoC) for large-capacity optical switching among processors. The interfaces for the input and output of the processor signals are electrical, and the on-chip data. Here, we propose a universal solution to standardize the design of fundamental multimode building blocks, by introducing a geometrical- optics-like concept adopting waveguide width larger than the working wavelength. Designed for durability and precision, our optical switches support single-mode and multimode fiber types with low insertion loss, high return loss, and reliable. Traditional switching requires optical/electrical/optical conversions, which brings additional power consumption and requires the deployment of large amounts of cooling equipment. The device composes of four Y-multijunctions and 2.
