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Towards MW average powers in ultrafast high-repetition-rate enhancement cavities

: Kaster, J.M.; Pupeza, I.; Eidam, T.; Jocher, C.; Fill, E.; Limpert, J.; Holzwarth, R.; Bernhardt, B.; Udem, T.; Hänsch, T.W.; Tünnermann, A.; Krausz, F.

Optical Society of America -OSA-, Washington/D.C.:
Advanced Solid-State Photonics, ASSP 2011. CD-ROM : 13.-16.2.2011, Istanbul, Turkey
Washington, DC: OSA, 2011 (OSA Technical digest series)
Paper HFB4
Conference "Advanced Solid-State Photonics" (ASSP) <2011, Istanbul>
Conference Paper
Fraunhofer IOF ()

We report on high-power, ultrafast enhancement cavity designs with enlarged laser spots on the mirrors. Together with a novel seeding Yb-fiber based CPA, MW-level intra-cavity average powers with sub-ps pulse durations come into reach.