Lasing on the4I13/2→4I15/2transition of Er3+ions in ZrO2– Y2O3– Er2O3crystals under resonant diode pumping into the4I13/2level

Experimental results on lasing in ZrO2 – Y2O3 – Er2O3 crystals are presented. Under diode pumping of ZrO2 – Y2O3 (13.8 mol %) – Er2O3 (0.2 mol %) crystals into the 4I13/2 level of Er3+ ions, lasing is obtained at the 4I13/2 → 4I15/2 transition with a wavelength of 1648 nm.