Spectroscopy, modelling and laser operation of holmium doped laser crystals Academic Article uri icon


  • Spectroscopic studies using laser induced fluorescence and numerical modelling of energy transfer and back transfer mechanism are reported in Er: Tm: Ho: YLF, Cr: Tm: Ho: YAG and Cr: Tm: YAG laser crystals at various temperatures (10 K-300 K). Direct energy transfer from Tm 3+ excited states to Ho 3+ 5 I 7 emitting level was observed and analyzed both in YAG and YLF. Further analysis of Cr 3+ and Tm 3+ time-dependent emission curves indicate a strong correlation of chromium-thulium pairs. Pulsed operation of holmium laser at high temperature will be presented.

publication date

  • January 1, 1993