【摘要】 采用提拉法生长了不同Sc掺杂的Sc:Mn:Fe:LiNbO₃晶体,通过紫外-可见光谱测试分析了Sc:Mn:Fe:LiNbO₃晶体的缺陷结构,利用光斑畸变法表征了其抗光损伤能力。结果表明:当Sc₂O₃的浓度超过阈值浓度（1.5%,摩尔分数）时,Sc:Mn:Fe:LiNbO₃晶体的抗光损伤能力远远高于未达到阈值浓度的晶体,其紫外-可见光谱将发生红移;当Sc₂O₃的浓度未达到阈值浓度时,随着Sc掺量的增加.Sc:Mn:Fe:LiNbO₃晶体的紫外-可见光谱将发生紫移。更多还原

【Abstract】 Sc:Mn:Fe:LiNbO₃ crystals with different Sc³⁺doping concentrations were grown by the Czochralski method from congru- ent melts.The defect structure of the crystals were studied with ultraviolet-visible（UV-Vis）absorption spectra,and the optical dam- age resistance was characterized by the transmitted spot distortion method.In Sc:Mn:Fe:LiNbO₃ crystals when the doping concentra- tion of Sc₂O₃ exceeds the threshold concentratin（1.5%,in mole）,the optical damage resistance is much higher than in other crystals, and the absorption-edge-position of Sc:Mn:Fe:LiNbO₃ crystals has a red-shift.When the doping concentration of Sc₂O₃ cannot reach the threshold concentration,the absorption-edge-position of Sc:Mn:Fe:LiNbO₃ crystals shifts to violet with the increase of doping content of Sc₂O₃-doped increased.更多还原