title: Complete analog control of the carrier-envelope-phase of a high-power laser amplifier.
abstract: In this work we demonstrate the development of a complete analog feedback loop for the control of the carrier-envelope phase (CEP) of a high-average power (20 W) laser operating at 10 kHz repetition rate. The proposed method combines a detection scheme working on a single-shot basis at the full-repetition-rate of the laser system with a fast actuator based either on an acousto-optic or on an electro-optic crystal. The feedback loop is used to correct the CEP fluctuations introduced by the amplification process demonstrating a CEP residual noise of 320 mrad measured on a single-shot basis. The comparison with a feedback loop operating at a lower sampling rate indicates an improvement up to 45% in the residual noise. The measurement of the CEP drift for different integration times clearly evidences the importance of the single-shot characterization of the residual CEP drift. The demonstrated scheme could be efficiently applied for systems approaching the 100 kHz repetition rate regime.
authors.forename: C
authors.initials: C
authors.lastname: Feng
authors.forename: J-F
authors.initials: JF
authors.lastname: Hergott
authors.forename: P-M
authors.initials: PM
authors.lastname: Paul
authors.forename: X
authors.initials: X
authors.lastname: Chen
authors.forename: O
authors.initials: O
authors.lastname: Tcherbakoff
authors.forename: M
authors.initials: M
authors.lastname: Comte
authors.forename: O
authors.initials: O
authors.lastname: Gobert
authors.forename: M
authors.initials: M
authors.lastname: Reduzzi
authors.forename: F
authors.initials: F
authors.lastname: Calegari
authors.forename: C
authors.initials: C
authors.lastname: Manzoni
authors.forename: M
authors.initials: M
authors.lastname: Nisoli
authors.forename: G
authors.initials: G
authors.lastname: Sansone