Abstract: The HAP SSL crystal Nd3+:d3Ga5O12(Nd3+:GG) was grown by the Czochralski method. The absorption and emission spectra of Nd3+:GG crystal at room temperature were studied. The relationship between the energy level scheme and the emission spectra was analyzed. The absorption, emission cross-section and fluorescence lifetime are estimated as 4.32×10-20cm-2,2.3×10-19cm-2, 240μs, respectively. From the oscillator strengths of the absorption transitions the Judd-offelt intensity parameters were evaluated.The spectroscopic parameters of Nd3+:GG and Nd3+:AG crystal were compared, and the Nd3+:GG crystal has many advantages over Nd3+:YAG.

Key words: The HAP SSL crystal Nd3+:d3Ga5O12(Nd3+:GG) was grown by the Czochralski method. The absorption and emission spectra of Nd3+:GG crystal at room temperature were studied. The relationship between the energy level scheme and the emission spectra was analyzed. The absorption, emission cross-section and fluorescence lifetime are estimated as 4.32×10-20cm-2,2.3×10-19cm-2, 240μs, respectively. From the oscillator strengths of the absorption transitions the Judd-offelt intensity parameters were evaluated.The spectroscopic parameters of Nd3+:GG and Nd3+:AG crystal were compared, and the Nd3+:GG crystal has many advantages over Nd3+:YAG.