title: Enhancement cavities for zero-offset-frequency pulse trains.
abstract: The optimal enhancement of broadband optical pulses in a passive resonator requires a seeding pulse train with a specific carrier-envelope-offset frequency. Here, we control the phase of the cavity mirrors to tune the offset frequency for which a given comb is optimally enhanced. This enables the enhancement of a zero-offset-frequency train of sub-30-fs pulses to multi-kW average powers. The combination of pulse duration, power, and zero phase slip constitutes a crucial step toward the generation of attosecond pulses at multi-10-MHz repetition rates. In addition, this control affords the enhancement of pulses generated by difference-frequency mixing, e.g., for mid-infrared spectroscopy.
authors.forename: S
authors.initials: S
authors.lastname: Holzberger
authors.forename: N
authors.initials: N
authors.lastname: Lilienfein
authors.forename: M
authors.initials: M
authors.lastname: Trubetskov
authors.forename: H
authors.initials: H
authors.lastname: Carstens
authors.forename: F
authors.initials: F
authors.lastname: Lücking
authors.forename: V
authors.initials: V
authors.lastname: Pervak
authors.forename: F
authors.initials: F
authors.lastname: Krausz
authors.forename: I
authors.initials: I
authors.lastname: Pupeza