The neodymium tungstate single crystals Nd 2(WO 4) 3 were grown using the Czochralski method. The energy level scheme of Nd 3+ was obtained through the spectral measurement. The upconversion luminescence of the crystals at 457 and 657 nm, corresponding to the 4D 5/2 → 4I 11/2 and 2G 7/2 → 4I 9/2 transitions, respectively, excited by 808 nm of a laser diode, was observed at room temperature. The fluorescence intensity and the excitation light power have a linear relationship at 457 nm and a quadratic relationship at 657 nm. The energy level scheme of Nd 3+ was obtained through the spectral measurement. The upconversion luminescence of the crystals at 457 and 657 nm, corresponding to the 4D 5/2 → 4I 11/2 and 2G 7/2 → 4I 9/2 transitions, respectively, excited by 808 nm of a laser diode, was observed at room temperature. The fluorescence intensity and the excitation light power have a linear relationship at 457 nm and a quadratic relationship at 657 nm.