Crosstalk Reduction and λ-Selectivity Enhancement of On-Chip Array Waveguide Grating Using Ring Resonator

Abstract

With the increasing demand for high-speed and compact photonic devices in modern communication systems, migrating crosstalk between adjacent waveguides in arrayed waveguide gratings (AWG) has become essential. A novel approach is proposed to address the challenges of crosstalk reduction and wavelength selectivity enhancement in on-chip AWG by integrating ring resonators. By strategically placing ring resonators near the AWG's output waveguide, this approach effectively reduces unwanted interference and crosstalk to −13 dB, improving signal quality and transmission efficiency. Additionally, this integration of ring resonators enhances wavelength selectivity, allowing for precise control of desired output from individual wavelength channels within the AWG. This selectivity enhancement offers desired wavelength routing and multiplexing flexibility, making it well-suited for advanced optical communication networks and wavelength-division multiplexing applications. The results validate the effectiveness of the proposed technique, offering promising prospects for high-performance integrated photonic devices and advancing next-generation optical communication systems. © 2025 Elsevier B.V., All rights reserved.