title: Carrier-envelope-phase stabilized chirped-pulse amplification system scalable to higher pulse energies.
abstract: We have demonstrated a carrier-envelope phase (CEP) stabilized chirped-pulse amplification (CPA) system employing a grating-based pulse stretcher and compressor and a regenerative amplifier for the first time. In addition to stabilizing the carrier-envelope offset phase of a laser oscillator, a new pulse selection method referenced to the carrier-envelope offset beat signal was introduced. The pulse-selection method is more robust against the carrier-envelope offset phase fluctuations than a simple pulse-clock dividing method. We observed a stable fringe in a self-referencing spectrum interferometry of the amplified pulse, which implies that the CEP of amplified pulse is stabilized. We also measured the effect of the beam angle change on the CEP of amplified pulses. The result demonstrates that the CEP stabilized CPA is scalable to higher-pulse energies.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kakehata
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Takada
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Kenji
authors.initials: K
authors.lastname: Torizuka
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Takamiya
authors.forename: Kazuki
authors.initials: K
authors.lastname: Nishijima
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Homma
authors.forename: Hideo
authors.initials: H
authors.lastname: Takahashi
authors.forename: Katsuaki
authors.initials: K
authors.lastname: Okubo
authors.forename: Shinki
authors.initials: S
authors.lastname: Nakamura
authors.forename: Yahei
authors.initials: Y
authors.lastname: Koyamada