4 papers
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…
Terahertz amplification by injection locking of waveguide resonant tunneling diode
James Greenberg, Brendan M. Heffernan, William F. McGrew +1
High power and low phase noise oscillators at terahertz frequencies are required for several burgeoning scientific and technological applications, including radioastronomy, imaging…
Dual-Wavelength Brillouin Lasers as compact Opto-Terahertz References for Low-Noise Microwave Synthesis
Scott C. Egbert, James Greenberg, Brendan M. Heffernan +2
Compact, ultra-low phase noise 10 GHz signals are essential for modern radar, coherent communications, and time-frequency metrology, especially with rising demands for additional s…
Terahertz molecular frequency references: theoretical analysis of optimal instability
W. F. McGrew, James Greenberg, Keisuke Nose +2
We report a comprehensive theoretical analysis of the instability achievable by using phase modulation spectroscopy to lock a terahertz local oscillator to an absorptive reference…