Probing ring resonator sensor based on Vernier effect

Wenwen Zhang; Jing Wang; Hao Zhang

doi:10.1117/12.3025400

2 October 2024 Probing ring resonator sensor based on Vernier effect

Wenwen Zhang, Jing Wang, Hao Zhang

Author Affiliations +

Proceedings Volume 13113, Photonic Computing: From Materials and Devices to Systems and Applications; 1311309 (2024) https://doi.org/10.1117/12.3025400
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Conference Poster

Abstract

The Vernier effect has seen extensive application in optical structures, serving to augment the free spectral range (FSR). A substantial FSR is vital in a myriad of applications including multiplexers, enabling a broad, clear band comparable to the C-band to accommodate a maximum number of channels. Nevertheless, a large FSR often conflicts with bending loss, as it necessitates a smaller resonator radius, thus increasing the insertion loss in the bending portion. To facilitate FSR expansion without amplifying bending loss, we employed cascaded and parallel racetrack resonators and ring resonators of varying radius that demonstrate the Vernier effect. In this study, we designed, fabricated, and tested multiple types of racetrack resonators to validate the Vernier effect and its FSR extension capabilities. Our investigations substantiate that the Vernier effect, based on cascaded and series-coupled micro-ring resonator (MRR) sensors, can efficiently mitigate intra-channel cross-talk at higher data rates. This is achieved by providing larger input-to-through suppression, thus paving the way for future applications.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wenwen Zhang, Jing Wang, and Hao Zhang "Probing ring resonator sensor based on Vernier effect", Proc. SPIE 13113, Photonic Computing: From Materials and Devices to Systems and Applications, 1311309 (2 October 2024); https://doi.org/10.1117/12.3025400

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