Abstract
The performance of Ho:Tm:YLF pumped by an Alexandrite laser was compared to previously obtained results for comparable Ho:Tm:YAG experiments. We have used an Alexandrite laser with pulse durations of 650μs and 200μs to longitudinally pump Ho:Tm:YLF crystal with 1.5% and 0.5% Ho concentration and length of 4 to 6mm. For a 1.5% Ho concentration in YLF, with pump pulse of 200μs, a slope efficiency as high as 50% is obtained for 6mm long crystal. In general, higher slope efficiencies are achieved in Ho:Tm:YLF than in Ho:Tm:YAG. Previous Ho:Tm:YAG experimental measurements are in good agreement with an improved rate equation model.
© 1993 Optical Society of America
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