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Multipass cell for high-power few-cycle compression

: Müller, M.; Buldt, J.; Stark, H.; Grebing, C.; Limpert, J.

Volltext ()

Optics Letters 46 (2021), Nr.11, S.2678-2681
ISSN: 0146-9592
ISSN: 1539-4794
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IOF ()
average output power; Cell transmissions; few-cycle pulse; multipass cell; Nonlinear compression

A multipass cell for nonlinear compression to few-cycle pulse duration is introduced composing dielectrically enhanced silver mirrors on silicon substrates. Spectral broadening with 388 W output average power and 776 µJ pulse energy is obtained at 82% cell transmission. A high output beam quality (M2<1.2) and a high spatio-spectral homogeneity (97.5%), as well as the compressibility of the output pulses to 6.9 fs duration, are demonstrated. A finite element analysis reveals scalability of this cell to 2 kW average output power.