Abstract
An Er:Sr3Yb(BO3)3 crystal was grown by the Czochralski method. Polarized spectral properties of the crystal were investigated, including the polarized absorption and fluorescence spectra and the fluorescence decay. The fluorescence quantum efficiency of the upper laser level 4I13/2 of Er3+ ions and efficiency of energy transfer from Yb3+ to Er3+ ions were obtained. End-pumped by a diode laser at 970 nm in a hemispherical cavity, 1.4 W quasi-cw laser around 1.55 μm with slope efficiency of 15% and absorbed pump threshold of 4.53 W was achieved in a 1.27-mm-thick c-cut Er:Sr3Yb(BO3)3 crystal.
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