Nonlinear optical bistability in microring resonators for enhanced phase sensing

Photonic microring resonators are used in a variety of chip-integrated sensing applications where they allow to measure transmission intensity changes upon external signals with a sensitivity that scales linearly with the Q-factor. In this work, we suggest to exploit the nonlinear self-phase-modulat...

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Bibliographic Details
Main Authors Tritschler, Patrick, Schweikert, Christian, Klenk, Rouven H, Abdani, Simon, Sözen, Onur, Vogel, Wolfgang, Rademacher, Georg, Ohms, Torsten, Zimmermann, André, Degenfeld-Schonburg, Peter
Format Journal Article
LanguageEnglish
Published 12.08.2024
Subjects
Physics - Applied Physics
Physics - Optics
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Summary:Photonic microring resonators are used in a variety of chip-integrated sensing applications where they allow to measure transmission intensity changes upon external signals with a sensitivity that scales linearly with the Q-factor. In this work, we suggest to exploit the nonlinear self-phase-modulation effect to increase the overall sensitivity by an additional gain factor appearing when the operational point of the nonlinear resonator is chosen just at the cross-over from the mono- to the bistable regime. We present the theoretical idea together with a first proof of concept experiment displaying a gain factor of 22 on a chip-integrated silicon-nitride resonator.
DOI:10.48550/arxiv.2408.06247