Self-frequency changing Laser Crystal Nd~(3+):GdAl3(BO_3)_3

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 4F3/2 level is 293μs. 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.