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Browsing by Author "Bernhardi, EH"

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  • Bollig, C; Strauss, HJ; Esser, MJD; Koen, W; Schellhorn, M; Preussler, D; Nyangaza, K; Jacobs, Cobus; Bernhardi, EH; Botha, LR (IEEE, 2009-06)
    Ho:YLF is an attractive laser material for 2 µm high energy sources since it has a much longer upper laser level lifetime (~14 ms) and higher emission cross section than Ho:YAG. In addition, the very weak thermal lens on ...
  • Esser, MJD; Preussler, DR; Bernhardi, EH; Bollig, C; Posewang, M (Springer Verlag, 2009-10)
    High power operation at 1818 and 1915 nm has been demonstrated from a Tm:GdVO4 laser operating in quasi-continuous-wave mode with a maximum measured power of 8.7Wand a laser output energy of 175 mJ was observed in a 20 ms ...
  • Bollig, C; Koen, W; Strauss, H; Bernhardi, EH; Botha, R; Esser, D; Preussler, DR (2008)
    Of the various Neodymium-doped materials, Nd:YLF is particularly attractive for use in high-power diode endpumped solid-state lasers due to its weak thermal lens, especially on the σ-polarisation, and it’s long upper laser ...
  • Bernhardi, EH; Forbes, A; Bollig, C; Esser, MJD (2008)
    One of the main problems that limit the power scaling of diode-end-pumped solid-state lasers is the generation of heat inside the laser gain medium which can ultimately cause fracture. In this paper a time-dependent ...