Spectroscopy, modeling, and laser operation of thulium-dopedcrystals at 2.3 μm |
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| Authors: | Sudesh V. Piper J.A. |
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| Affiliation: | Centre for Lasers & Applications, Macquarie Univ., North Ryde, NSW; |
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| Abstract: | Pulsed room-temperature lasers based on the thulium 2.3-μm 3H4-3H5 transition have been achieved in 1.5% Tm:YAG, 2% Tm:LuAG, and 1.5% Tm:YLF crystals using a pulsed alexandrite laser at 785 nm as the pump source in a collinear geometry. The absorbed energy thresholds (slope efficiencies) for 1.5% Tm:YAG, 2% Tm:LuAG, and 1.5% Tm:YLF lasers are measured to be 1.2 mJ (14%), 1.8 mJ (13%), and 1.0 mJ (18%), respectively, which are in good agreement with the theoretically predicted results. The experimental results indicate 1.0 mJ thulium to be the most optimum concentration for 2.3-μm laser action. The thulium lasers are tuned around 2.3 μm using an intracavity single birefringent plate of quartz |
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