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Article Dans Une Revue Optics Express Année : 2014

Yb:CaF 2 thin-disk laser

Résumé

We present Ytterbium-doped CaF 2 as a laser active material with good prospects for high-power operation in thin-disk laser configuration owing to its favorable thermal properties. Thanks to its broad emission bandwidth the material is also suitable for the generation of ultra-short pulses. The properties of the crystal as well as the challenges related to the coating, polishing, mounting and handling processes which are essential to achieve high power laser oscillation in thin-disk configuration are discussed. A wavelength tunability of 92 nm is demonstrated, which confirms the potential of Yb:CaF 2 for the generation of ultra-short pulses. An output power of 250 W with an optical efficiency of η opt = 47% was measured in CW multimode thin-disk laser operation with a pump spot diameter of 3.6 mm. Using a smaller pump spot diameter of 1 mm the fundamental mode output power was 13 W with an optical efficiency of η opt = 34%.
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Dates et versions

hal-01222098 , version 1 (29-10-2015)

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Katrin Wentsch, Birgit Weichelt, Stefan Günster, Frédéric Druon, Patrick Georges, et al.. Yb:CaF 2 thin-disk laser. Optics Express, 2014, 22, pp.1524-1532. ⟨10.1364/OE.22.001524⟩. ⟨hal-01222098⟩
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