ZrO 2 -13.6 mol%Y 2 O 3 -0.4 mol%Ho 2 O 3 (YSZ:Ho) solid-state laser at 2130 nm under LiYF 4 :Tm laser pumping was developed. The maximum output power of 5 W with a slope efficiency of 37% for continuous-wave operation was achieved. A tunable laser operating in the spectral range 2056-2168 nm on the YSZ:Ho crystals under LiYF 4 :Tm laser pumping was demonstrated.Keywords: ZrO 2 -13.6 mol%Y 2 O 3 -0.4 mol%Ho 2 O 3 crystals, tunable laser operating, laser
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