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- W2577558954 abstract "Epitaxial growth of highly Yb-doped films on passive substrates is especially interesting for the strongly anisotropic monoclinic double tungstate hosts where the extremely large cross sections would permit the utilization of the thin disk laser concept with very thin (<100 μm) active layers which can be face cooled and pumped in a single pass. Recently we demonstrated efficient laser operation of Yb-doped epitaxial composites on the basis of the monoclinic KLu(WO4)2 (KLuW) crystal [1]. The results were superior in comparison to those we previously achieved using KY(WO4)2 [2] due to the closer lattice parameters of KLu(WO4)2 and KYb(WO4)2 [1]. Here we demonstrate femtosecond mode-locked operation with the same 10% Yb-doped KLuW/KLuW sample [1]. The 100-μm thick Yb:KLuW layer was grown by liquid phase epitaxy on the (010) face, normal to the Np-principal optical axis, of a 1.1-mm thick KLuW substrate. The sample was oriented for polarization parallel to the Nm-optical axis and positioned under Brewster angle between two focusing mirrors (RC=-10 cm) folding an astigmatically compensated Z-shaped cavity. The laser was longitudinally pumped through one of the folding mirrors using an f=6.28 cm lens by a tunable cw Ti:sapphire laser focused to a beam waist of about 30 μm in the position of the epitaxial crystal. One arm contained an additional focusing mirror (RC=-10 cm) to increase the intensity on the semiconductor saturable absorber mirror (SAM) used for passive mode locking which terminated the cavity. Two SF10 Brewster prisms with a separation of 31 cm were inserted in the other arm, containing the plane output coupler, for dispersion compensation. The cavity length corresponded to a repetition rate of 100 MHz." @default.
- W2577558954 created "2017-01-26" @default.
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- W2577558954 date "2005-01-01" @default.
- W2577558954 modified "2023-10-09" @default.
- W2577558954 title "Femtosecond mode-locking of epitaxially grown Yb:KLu(WO4)2 composites" @default.
- W2577558954 hasPublicationYear "2005" @default.
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