title: Power scaling of a high-repetition-rate enhancement cavity.
abstract: A passive optical resonator is used to enhance the power of a pulsed 78 MHz repetition rate Yb laser providing 200 fs pulses. We find limitations relating to the achievable time-averaged and peak power, which we distinguish by varying the duration of the input pulses. An intracavity average power of 18 kW is generated with close to Fourier-limited pulses of 10 W average power. Beyond this power level, intensity-related effects lead to resonator instabilities, which can be removed by chirping the seed laser pulses. By extending the pulse duration in this way to 2 ps, we could obtain 72 kW of intracavity circulating power with 50 W of input power.
authors.affiliation: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany. ioachim.pupeza@mpq.mpg.de
authors.forename: Ioachim
authors.initials: I
authors.lastname: Pupeza
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Jens
authors.initials: J
authors.lastname: Rauschenberger
authors.forename: Birgitta
authors.initials: B
authors.lastname: Bernhardt
authors.forename: Akira
authors.initials: A
authors.lastname: Ozawa
authors.forename: Ernst
authors.initials: E
authors.lastname: Fill
authors.forename: Alexander
authors.initials: A
authors.lastname: Apolonski
authors.forename: Thomas
authors.initials: T
authors.lastname: Udem
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Zeyad A
authors.initials: ZA
authors.lastname: Alahmed
authors.forename: Abdallah M
authors.initials: AM
authors.lastname: Azzeer
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann
authors.forename: Theodor W
authors.initials: TW
authors.lastname: Hänsch
authors.forename: Ferenc
authors.initials: F
authors.lastname: Krausz