Mid-infrared emission in Dy:YAlO_3 crystal

In this work, we report on the spectroscopic properties of Dy3+ doped YAlO3 crystal grown by Czochralski technique. The Judd-Ofelt theory was performed based on the measured polarized absorption spectra. Under optical pumping at 1300 nm, Dy:YAP crystal exhibited a broad MIR emission centered at 3020 nm, with a bandwidth of 520 nm at full width half maximum. The decay lifetime of the 6H13/2 level was measured to be 8.88 ms, and the corresponding quantum efficiency evaluated was 57.9%. The studied optical gain properties indicate that Dy:YAlO3 crystal could be a potential candidate for solid-state mid-infrared laser applications.