Nonreciprocal Optical Routing in Multi-port Magneto-Optical Devices on Silicon

TL;DR

This paper demonstrates a silicon integrated 5x5 multiport nonreciprocal photonic device using magneto-optical waveguides, enabling complex light routing with high isolation and low crosstalk for photonic circuits.

Contribution

It introduces the first experimental multi-port magneto-optical device on silicon, enabling advanced signal routing in integrated photonic networks.

Findings

Achieved 16 dB isolation ratio.

Demonstrated nonreciprocal transmission between 5x5 ports.

Realized designable light routing with low crosstalk.

Abstract

Nonreciprocal optical devices are key components in photonic integrated circuits for light reflection blocking and routing. Most reported silicon integrated nonreciprocal optical devices to date were unit devices. To allow complex signal routing between multi-ports in photonic networks, multi-port magneto-optical (MO) nonreciprocal photonic devices are desired. In this study, we report experimental demonstration of a silicon integrated 5*5 multiport nonreciprocal photonic device based on magneto-optical waveguides. By introducing different nonreciprocal phase shift effect to planar photonic waveguides, the device focuses light to different ports for both forward and backward propagation. The device shows designable nonreciprocal transmission between 5*5 ports, achieving 16 dB isolation ratio and -18 dB crosstalk.