Design and optimization of Al₂O₃-based Strip-Loaded optical waveguides for ring resonator

Abstract

This study presents the design and comparative of optical ring resonators (ORRs) based on single-mode hybrid optical waveguides, specifically Strip Loaded Optical Waveguides (SOW) and Channel Optical Waveguides (COW). Using Al₂O₃ thin films synthesized by atomic layer deposition (ALD), we evaluate key parameters such as effective mode index, single-mode operation range, and evanescent wave characteristics. Compared to COW, the results show that SOW configurations provide better optical performance and improved coupling efficiency. Transmission spectra analysis of the all-pass optical ring resonator (AOR) demonstrates SOW's enhanced filtering performance, confirming its suitability for cost-effective, high-performance photonic devices.