Solid-state carrier-envelope phase stabilization via quantum interference control of injected photocurrents.
We demonstrate carrier-envelope phase stabilization of a mode-locked Ti:sapphire laser by use of quantum interference control of injected photocurrents in a semiconductor. No harmonic generation is required for this stabilization technique. Instead, interference between coexisting single- and two-photon absorption pathways in the semiconductor provides a phase comparison between different spectral components. The phase comparison, and the detection of the photocurrent that it produces, both occur within a single low-temperature-grown gallium arsenide sample. The carrier-envelope offset beat note fidelity is 30 dB in a 10-kHz resolution bandwidth. The out-of-loop phase-noise level is essentially identical to the best previous measurements with the standard self-referencing technique.
Roos
P A
PA
JILA, National Institute of Standards and Technology, and University of Colorado, Boulder, Boulder, Colorado 80309-0440, USA. roos@jila.colorado.edu
Li
Xiaoqin
X
Smith
R P
RP
Pipis
Jessica A
JA
Fortier
T M
TM
Cundiff
S T
ST