Study of a New 2-μm Laser Crystal Tm, Li:ZnWO4

${T m}^{3+}, \mathbf{L i}^{+}: \mathbf{Z n W O}_{4}$ single-crystal was grown by the Czochralski (Cz) method. The actual concentrations of the dopants were measured. Dispersions and temperature coefficients of the refractive indices (RI), as well as the mechanical strength characteristics of the crystal were measured. Spectroscopic studies of the crystal were carried out. The first laser operation above 2 $\mu \mathrm{m}$ at this crystal was obtained.