title: Coherent combining of femtosecond pulses parametrically amplified in BBO crystals.
abstract: We report on the first experimental realization of coherent combining of parametrically amplified femtosecond pulses. The proposed and implemented two-loop active stabilization system allows us to achieve 110 as relative timing jitter between combined pulses, which is necessary for efficient coherent beam combining. In each channel of the two-channel laser setup, pulses were parametrically amplified in β-BaB2O4 (BBO) crystals to 50 μJ energy, compressed to 49 fs duration, and then coherently combined with efficiency as high as 97%. Currently, it is the shortest duration of amplified pulses for which coherent combining is demonstrated.
authors.forename: S N
authors.initials: SN
authors.lastname: Bagayev
authors.forename: V E
authors.initials: VE
authors.lastname: Leshchenko
authors.forename: V I
authors.initials: VI
authors.lastname: Trunov
authors.forename: E V
authors.initials: EV
authors.lastname: Pestryakov
authors.forename: S A
authors.initials: SA
authors.lastname: Frolov