Abstract: Nd³⁺:GdAl₃(BO₃)₄ crystals with the size up to 30mm were grown by using the flux method. The absorption and emission spectra in function of the
σ and π polarizations were presented. The radiative lifetime of the ⁴F_3/2 level is 293\mus. From the Judd-Ofelt parameters, the σ-polarized
stimulated emission cross-section was measured to be 2.9×10^-19cm² at the laser wavelength: 1062.9nm, and 5.5×10^-20cm² at the laser wavelength:
1338nm. UV generation tuneable in 378～382nm , green(531nm) generation, blue generation tuneable in 436～443nm and red(669nm) generation as well as infrared
generation tuneable in 1305～1365nm by self-frequency changing were obtained with the output of 105μJ/pulse, 119.5μJ/pulse, 445μJ/pulse, 19μJ/pulse
and 31μJ/pulse respectively, when this crystal was pumped by dye laser.