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Zeptosecond-level timing-noise floor in optical-to-terahertz photomixing
William F. McGrew, James Greenberg, Scott C. Egbert +6
Optical generation of terahertz (0.1 to 10\,THz) carriers can, in principle, preserve the spectral purity of an optical reference without the noise penalty associated with electron…
Low noise resonant amplification by optical injection-locking and residual phase noise cancellation
Y. Lange Simmons, James Greenberg, Brendan M. Heffernan +1
We demonstrate a low noise, high-gain, resonant optical amplifier that combines injection locking with feed-forward cancellation of residual phase noise. The wavelength-agnostic ar…
Dual-Wavelength Cancellation of Dispersion-Induced Phase Noise in Opto-Terahertz Fiber Links
Brendan M. Heffernan, James Greenberg, William F. McGrew +1
Stable dissemination of terahertz (THz) signals over long distances is important for next-generation synchronization networks, radio astronomy, and high-capacity wireless systems.…
Tunable microwave frequency synthesis with optically-derived spectral purity
James Greenberg, Scott C. Egbert, William F. McGrew +2
Microwave synthesizers are central to test and measurement systems across applications including wireless communications, radar, spectroscopy, and time and frequency metrology. Sta…
Attosecond-timing millimeter waves via Kerr optical frequency division
Scott C. Egbert, Brendan M. Heffernan, James Greenberg +2
Millimeter-wave oscillators underpin key applications in communication, spectroscopy, radar, and astronomy, yet their achievable spectral purity remains limited. Approaches that di…