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13 March 2024 Comb dynamics in photonic crystal microresonators with built-in nonlinear optical isolator on single-layer deposited silicon nitride
Jakob Grzesik, Geun Ho Ahn, Alexander D. White, Jelena Vuckovic
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Proceedings Volume PC12871, Laser Resonators, Microresonators, and Beam Control XXVI; PC128710A (2024) https://doi.org/10.1117/12.3000587
Event: SPIE LASE, 2024, San Francisco, California, United States
Abstract
Nonlinear frequency generation is demonstrated in silicon nitride photonics using microring resonators with engineered dispersion through a Bragg grating perturbation. The processes by which these nonlinear effects occur introduces backscattered light, due to bidirectionally-propagating hybridized modes. Such backscattered light is often detrimental to the pump laser and imposes a limit on the power that can be delivered to the ring system, reducing the operating range of ring resonators for nonlinear light generation. We mitigate these effects with an on-chip passive optical isolator, which protects the pump laser from backscattered light, allowing for higher pump power operation regimes. Furthermore, we introduce a recycling channel that allows for power to be re-pumped into the mirroring resonator to enable controllable exploration into more interesting nonlinear optics phenomena.
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Jakob Grzesik, Geun Ho Ahn, Alexander D. White, and Jelena Vuckovic "Comb dynamics in photonic crystal microresonators with built-in nonlinear optical isolator on single-layer deposited silicon nitride", Proc. SPIE PC12871, Laser Resonators, Microresonators, and Beam Control XXVI, PC128710A (13 March 2024); https://doi.org/10.1117/12.3000587
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KEYWORDS
Optical isolators
Silicon nitride
Microresonators
Dispersion
Nonlinear optics
Photonic crystals
Reflectors
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