Generation of phase-locked and tunable continuous-wave radiation in the terahertz regime.
Broadly tunable phase-stable single-frequency terahertz radiation is generated with an optical heterodyne photomixer. The photomixer is excited by two near-infrared CW diode lasers that are phase locked to the stabilized optical frequency comb of a femtosecond titanium:sapphire laser. The terahertz radiation emitted by the photomixer is downconverted into RF frequencies with a waveguide harmonic mixer and measurement-limited linewidths at the Hertz level are demonstrated.
Quraishi
Qudsia
Q
JILA, Department of Physics, University of Colorado and the National Institute of Standards and Technology, Boulder 80309-0440, USA. quraishi@colorado.edu
Griebel
Martin
M
Kleine-Ostmann
Thomas
T
Bratschitsch
Rudolf
R