An integrated optical sensor based on cascaded polarization convertor and slot waveguide microring resonator

Jiamei Gu; Mingyu Li; Jianjun He

doi:10.1117/12.2687230

27 November 2023 An integrated optical sensor based on cascaded polarization convertor and slot waveguide microring resonator

Jiamei Gu, Mingyu Li, Jianjun He

Author Affiliations +

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 127710O (2023) https://doi.org/10.1117/12.2687230
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

A highly sensitive integrated optical sensor based on cascaded polarization convertor and slot waveguide microring resonator is proposed. The structure consists of an edge coupler, slot waveguide microring resonators and a reflective polarization converter. One polarization input light of the through-port of the slot waveguide microring resonator is converted into the other polarization mode after passing through the reflective polarization converter, and is coupled into slot waveguide microring resonators again. The output light of the sensor is the cascaded through-port spectrum of two different polarizations. The power conversion efficiency of the reflective polarization converter is optimized to 80%. The free spectrum ranges of the two polarization modes are different to produce the Vernier effect. Thus, the sensitivity of the sensor increases dramatically. The theoretical sensitivity of our system is 21150 nm/ Refractive-Index-Unit (RIU) with the measurement range of 0.0007 RIU. This structure has great potential in biological recognition and chemical analysis.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiamei Gu, Mingyu Li, and Jianjun He "An integrated optical sensor based on cascaded polarization convertor and slot waveguide microring resonator", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 127710O (27 November 2023); https://doi.org/10.1117/12.2687230

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