Abstract
Transparent YAG ceramics doped with different concentrations of Tm3+ have been fabricated by solid state reactive sintering and their spectroscopic properties have been thoroughly investigated. Absorption, emission and fluorescence decay measurements have been carried out in different experimental conditions in order to obtain information about the radiative and non-radiative processes in these materials. The 2 µm stimulated emission performance has been evaluated using for the first time an astigmatically compensated cavity which permitted assessment of the tunability of the laser emission.
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