[en] The polarized absorption and emission spectra have been measured for the Tm³⁺ doped NaY(MoO₄)₂ crystal and spectral parameters have been estimated from the absorption data based on the Judd-Ofelt theory. The effective intensity parameters Ω_t^eff(t = 2, 4, 6) are 11.67 x10^-20, 2.21 x 10^-20, 1.74 x 10^-20 cm², respectively. From the intensity parameters, the radiative transition probabilities, radiative lifetimes, branching ratios and the emission cross-section have been calculated. In comparison with other Tm³⁺ doped laser crystals, Tm³⁺:NaY(MoO₄)₂ crystal has potential as a promising laser crystal