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Femtosecond enhancement cavities in the nonlinear regime

: Holzberger, S.; Lilienfein, N.; Carstens, H.; Saule, T.; Högner, M.; Lücking, F.; Trubetskov, M.; Pervak, V.; Eidam, T.; Limpert, Jens; Tünnermann, Andreas; Fill, E.; Krausz, F.; Pupeza, I.


Physical review letters 115 (2015), No.2, Art. 023902
ISSN: 0031-9007
ISSN: 1079-7114
Journal Article
Fraunhofer IOF ()

We combine high-finesse optical resonators and spatial-spectral interferometry to a highly phase-sensitive investigation technique for nonlinear light-matter interactions. We experimentally validate an ab initio model for the nonlinear response of a resonator housing a gas target, permitting the global optimization of intracavity conversion processes like high-order harmonic generation. We predict the feasibility of driving intracavity high-order harmonic generation far beyond intensity limitations observed in state-of-the-art systems by exploiting the intracavity nonlinearity to compress the pulses in time.