title: Time-domain stabilization of carrier-envelope phase in femtosecond light pulses.
abstract: We report a time-domain method of stabilizing the carrier-envelope phase (CEP) of femtosecond pulses. Temporal variations of the pulse envelope and the carrier electric-field phase were separately detected with the aid of intensity cross-correlation and interferometric cross-correlation. These detected signals were used to stabilize the CEP; the resulting 50-fold improvement in the fractional stability of the carrier-envelop-offset frequency was evaluated as 1.2 × 10(-11) at 0.1 second averaging periods and 1.7 × 10(-9) at 80 seconds, corresponding to a carrier envelope phase noise of 75 microradians and 10 milliradians, respectively. This method can be realized with a low pulse energy of ~10 pJ and does not require subsequent power amplification or spectral broadening. The high efficiency and short-term stability of this method can facilitate the use of femtosecond lasers in the field of industrial surface measurements, telecommunications, and space sciences.
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Kim
authors.forename: Ian
authors.initials: I
authors.lastname: Coddington
authors.forename: William C
authors.initials: WC
authors.lastname: Swann
authors.forename: Nathan R
authors.initials: NR
authors.lastname: Newbury
authors.forename: Joohyung
authors.initials: J
authors.lastname: Lee
authors.forename: Seungchul
authors.initials: S
authors.lastname: Kim
authors.forename: Seung-Woo
authors.initials: SW
authors.lastname: Kim