Abstract
A new mixed laser crystal Nd:Gd0.69Y0.3NbO4 (Nd:GYNO) with high quality was grown successfully by Czochralski method. Its structure parameters are obtained by the X-ray Rietveld refinement method. The effective segregation coefficient of Nd3+ ions is 0.61 in GYNO host. The maximum absorption cross section at 809 nm and peak emission cross section at 1065.6 nm of Nd:GYNO crystal are 11.6 × 10−20 and 20.5 × 10−20 cm2, respectively. The fluorescence lifetime of 4F3/2 manifold for Nd3+ in Nd:GYNO crystal is fitted to be 156 μs. Diode-pumped continuous-wave laser operations at 1.06 μm with Nd:GYNO crystals cut perpendicular to crystallographic a, b, and c axes (denoted as a-, b- c-cut, respectively) were demonstrated. A maximum output power of 0.98 W was obtained with c-cut crystal, corresponding to an optical-to-optical conversion efficiency of 31.3% and a slope efficiency of 30.4%. All these results imply that the Nd:GYNO crystal has great potential application in low and even moderate lasers.
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