Journal
OPTICA
Volume 8, Issue 11, Pages 1458-1461Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.433102
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Funding
- Air Force Office of Scientific Research [FA9550-15-1-0303]
- Semiconductor Research Corporation [SRS 2016-EP-2693-A]
- National Science Foundation [CCF-1640108]
- Army ResearchOffice [W911NF-17-1-0016]
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This study demonstrates dynamic control of photon lifetime using a silicon-nitride coupled-ring resonator, allowing for fast switch operations and on-chip true random number generation. It overcomes the Q-limited generation rate of DOPO and offers a new path for developing high-quality entropy sources.
In a passive cavity geometry, there exists a trade-off between resonant enhancement and response time, which is inherently limited by the cavity photon lifetime. We demonstrate frequency-selective, dynamic control of the photon lifetime using a silicon-nitride coupled-ring resonator. The photon lifetime is tuned by controlling an avoided mode crossing using thermo-optic tuning of the cavity resonance with integrated heaters. Using this effect, we achieve fast turn-on/off of a chi((3)) degenerate optical parametric oscillator (DOPO) and on-chip true random number generation. Our approach allows us to overcome the Q-limited generation rate of a single-ring-based DOPO and offers a path toward the development of a scalable integrated high-quality entropy source for modern cryptographic systems. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
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