Spectral evolution of two-photon emission in microresonators
- URL: http://arxiv.org/abs/2608.04684v1
- Date: Wed, 05 Aug 2026 10:52:08 GMT
- Title: Spectral evolution of two-photon emission in microresonators
- Abstract summary: High-Q silicon nitride microresonators are versatile sources for generating photon pairs via four-wave mixing.<n>We investigate the spectral coherence of this process, tracking the transition from the spontaneous quantum regime to the onset of optical parametric oscillation.
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- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: High-Q silicon nitride microresonators are versatile sources for generating photon pairs via four-wave mixing. We investigate the spectral coherence of this process, tracking the transition from the spontaneous quantum regime to the onset of optical parametric oscillation. By combining time-correlation measurements with phase-sensitive measurements, we continuously monitor the emission linewidth as it evolves from a cavity-lifetime-limited linewidth toward the pump-linewidth scale. This characterization is essential for optimizing integrated sources for scalable quantum networks.
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