FIELD: materials for laser equipment, in particular, single-crystal materials designed for production of active components of solid-state lasers. SUBSTANCE: erbium with chemical formula CaaY1-x-yYbxEry(BO3)3O, where x>0,001, y>0,001, x+y≤0,57, is additionally introduced as an activator in the single-crystal laser material based on oxyorthoborate of calcium-yttrium with ytterbium. EFFECT: produced active components of the 1.5- micron radiation band. 4 dwg, 1 tbl
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