Journal
OPTICS LETTERS
Volume 43, Issue 12, Pages 2772-2775Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.002772
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Funding
- Defense Advanced Research Projects Agency (DARPA) (ACES, DODOS)
- UMD [70NANB10H193]
- NIST-CNST [70NANB10H193]
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We propose and theoretically investigate a dispersion-engineered Si3N4 microring resonator, based on a cross section containing a partially-etched trench, that supports phase-locked, two-color soliton microcomb states. These soliton states consist of a single circulating intracavity pulse with a modulated envelope that sits on a continuous wave background. Such temporal waveforms produce a frequency comb whose spectrum is spread over two widely-spaced spectral windows, each exhibiting a squared hyperbolic secant envelope, with the two windows phase-locked to each other via Cherenkov radiation. The first spectral window is centered near the 1550 nm pump, while the second spectral window is tailored based on straightforward geometric control, and can be centered as short as 750 nm and as long as 3000 nm. We numerically analyze the robustness of the design to parameter variation, and consider its implications to self-referencing and visible wavelength comb generation. (C) 2018 Optical Society of America
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