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Compact fibre-laser-pumped Ho:YLF oscillator–amplifier system


We developed a compact Ho:YLF oscillator–amplifier system in a novel setup to utilise the unpolarised pump power from a fibre laser efficiently, and produced 21.3 mJ at 1 kHz, with an M 2 better than 1.1. The amplified energies agreed well with the predicted values from a two dimensional rotational symmetric amplifier model that we developed. The model considers upconversion losses and ground-state depletion, as well as the spatial distribution of the pump beam.

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Correspondence to W. Koen.

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Koen, W., Bollig, C., Strauss, H. et al. Compact fibre-laser-pumped Ho:YLF oscillator–amplifier system. Appl. Phys. B 99, 101–106 (2010).

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  • 42.55.Xi
  • 42.60.Gd
  • 42.60.Da