On-chip microresonator dispersion engineering via segmented sidewall modulation

Microresonator dispersion plays a crucial role in shaping the nonlinear dynamics of microcavity solitons. Here, we introduce and validate a method for dispersion engineering through modulating a portion of the inner edge of ring waveguides. We demonstrate that such partial modulation has a broadband effect on the dispersion profile, whereas modulation on the entire resonator’s inner circumference leads to mode splitting primarily affecting one optical mode. The impact of spatial modulation amplitude, period, and number of modulations on the mode splitting profile is also investigated. Through the integration of four modulated sections with different modulation amplitudes and periods, we achieve mode splitting across more than 50 modes over a spectral range exceeding 100 nm in silicon nitride resonators. These results highlight both the simplicity and efficacy of our method in achieving flatter dispersion profiles.

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Publication Details

Journal
Photonics Research
Published
2024-11-05
DOI
https://doi.org/10.1364/prj.530537
Citations
4
Primary Topic
Advanced Fiber Laser Technologies
Type
article
Field-Weighted Citation Impact
1.35

Funders

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On-chip microresonator dispersion engineering via segmented sidewall modulation

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On-chip microresonator dispersion engineering via segmented sidewall modulation

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article en
4 citations

Abstract

Microresonator dispersion plays a crucial role in shaping the nonlinear dynamics of microcavity solitons. Here, we introduce and validate a method for dispersion engineering through modulating a portion of the inner edge of ring waveguides. We demonstrate that such partial modulation has a broadband effect on the dispersion profile, whereas modulation on the entire resonator’s inner circumference leads to mode splitting primarily affecting one optical mode. The impact of spatial modulation amplitude, period, and number of modulations on the mode splitting profile is also investigated. Through the integration of four modulated sections with different modulation amplitudes and periods, we achieve mode splitting across more than 50 modes over a spectral range exceeding 100 nm in silicon nitride resonators. These results highlight both the simplicity and efficacy of our method in achieving flatter dispersion profiles.

Photonics ResearchVol. 13(2)
Friedrich-Alexander-Universität Erlangen-Nürnberg (DE), Chinese University of Hong Kong, Shenzhen (CN), Concordia University (CA), Technical University of Denmark (DK), Nanjing University of Aeronautics and Astronautics (CN)
Max-Planck-Gesellschaft, European Research Council
Affordable and clean energy
Openalex Percentile: Top 19%
Advanced Fiber Laser Technologies
1.35
DOISourceOpenAlex
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