Study of the spectral and kinetic characteristics of the Er3+ ion in BaY1.8Lu0.2F8 mixed crystals to assess the possibility of continuous laser oscillation at a wavelength of 2.7 μm

Herewe present the spectral and kinetic characteristics of $\mathrm{Er}^{3+}$ ions in the heavily doped $\mathrm{BaY}_{1.8} \mathrm{Lu}_{0.2} \mathrm{~F}_{8}$ mixed crystals and evaluate the possibility of continuous laser oscillation at a wavelength of $2.7 \mu \mathrm{m}$.