Thin epilayers of monoclinicKLu(WO₄)₂doped with thulium are grown by liquid phase epitaxy on undopedKLu(WO₄)₂substrates. The epitaxial composites are optically characterized and implemented in a cavity, longitudinally pumped (normal to the layer) by a Ti:sapphire laser. Tunable (1894–2039 nm) continuous-wave laser operation is achieved with maximum slope efficiency as high as 64% with respect to the absorbed pump power at 802 nm. The output power is limited by the crystal absorption.
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Silvestre et al. (2007) studied this question.
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