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Browsing by Author "Preussler, D"

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  • Strauss, HJ; Preussler, D; Esser, MJD; Koen, W; Jacobs, Cobus; Collett, OJP; Bollig, C (Optical Society of America, 2013-04)
    We report on a double-pass Ho:YLF slab amplifier which delivered 350 ns long single-frequency pulses of up to 330 mJ at 2064 nm, with a maximum M(sup2) of 1.5 at 50 Hz. It was end pumped with a diode-pumped Tm:YLF slab ...
  • 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 ...
  • Strauss, HJ; Koen, W; Bollig, C; Esser, MJD; Preussler, D; Nyangaza, K; Jacobs, Cobus (OSA/CLEO/IQEC, 2009-06)
    In this paper, researchers have demonstrated that a Ho:YLF oscillator and amplifier system can be designed in a compact setup where the pump power from an unpolarized fibre laser utilized efficiently. The system produced ...
  • Botha, LR; Bollig, C; Esser, D; Jacobs, Cobus; Preussler, D (South African Institute of Physics, 2009-07)
    A mathematical model was developed that accurately predicts the performance of an optically pumped HBr laser. Relatively high conversion efficiency was achieved. Tm pumped Ho:YLF is a viable source for pumping HBr laser, ...
  • Strauss, HJ; Burd, SC; Koen, W; Esser, MJD; Jacobs, Cobus; Collett, OJP; Nyangaza, K; Preussler, D; Bollig, C (2010-09)
    A novel multi-pass Tm: YLF laser was demonstrated with an improvement in efficiency, footprint and cost over a two diode stack pumped, single pass system. 100 W of output power from 261 W of incident diode pump power with ...
  • Esser, MJD; Strauss, H; Koen, WS; Preussler, D; Nyangaza, K; Bollig, C (2009-06)
    The authors have, through careful analysis of spectroscopic data, designed and demonstrated a diode-end-pumped, quasicontinuous wave Tm:GdVO4 laser operating at 1892 nm in order to pump a Q-switched Ho:YLF laser. The Ho:YLF ...
  • Esser, MJD; Preussler, D; Sharma, Ameeth; Jacobs, Cobus; Bollig, C (2009-11)
    In order to demonstrate the feasibility of a helicopter-based application using advanced laser technology, the authors have developed a rugged and compact mid-infrared solid-state laser. The requirement for the laser was ...
  • Esser, D; Preussler, D (2005)
    The presentation is about the simple technique to measure the thermal lens; Same pumping conditions as real laser; Same cooling configuration as real laser; Comparative experiment made; Nd:YVO4 has smaller thermal lens ...