title: Solid-state carrier-envelope phase stabilization via quantum interference control of injected photocurrents.
abstract: 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.
authors.affiliation: JILA, National Institute of Standards and Technology, and University of Colorado, Boulder, Boulder, Colorado 80309-0440, USA. roos@jila.colorado.edu
authors.forename: P A
authors.initials: PA
authors.lastname: Roos
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Li
authors.forename: R P
authors.initials: RP
authors.lastname: Smith
authors.forename: Jessica A
authors.initials: JA
authors.lastname: Pipis
authors.forename: T M
authors.initials: TM
authors.lastname: Fortier
authors.forename: S T
authors.initials: ST
authors.lastname: Cundiff