我们在同成份铌酸锂晶体中掺入四价离子铪,生长了掺杂浓度分别为2、4、6mol%的掺铪铌酸锂系列晶体.掺铪浓度达到4mol%时,晶体的抗光损伤能力为5×105W/cm2,比同成份纯铌酸锂晶体提高了4个数量级.应用全息法测得掺4、6mol%铪的铌酸锂晶体最大折射率变化为8.7×10-6,与高掺镁(6.5mol%)铌酸锂晶体的类似.晶体的红外吸收谱和紫外-可见光吸收谱也显示,掺杂浓度为4mol%时具有明显的阈值特征.由此可以确定铪离子在铌酸锂晶体中的阈值浓度约为4mol%.
参考文献
[1] | Zhong G.Measurements of Optically Induced Refractive Index Damage of Lithium Niobate Doped with Different Concentrations of MgO[A].IEEE Cat.No.80 CH1561-0,Optical Society of America,Washington D.C,1980:631. |
[2] | Volk T R et al.Optical and Nonlinear Optical Investigations in LiNbO3:Mg and LiNbO3:Zn[J].Ferroelectrics,1990,109:345. |
[3] | Yamamoto J K et al.Increased Optical Damage Resistance in Sc2O3-doped LiNbO3[J].Applied Physics Letters,1992,61:2156. |
[4] | Kong Y;Wen J;Wang H .New Doped Lithium Niobate Crystal with High Resistance to Photorefraction-LiNbO3:In[J].Applied Physics Letters,1995,66:280. |
[5] | Kokanyan E P et al.Reduced Photorefraction in Hafnium-doped Single-domain and Periodically Poled Lithium Niobate Crystals[J].Applied Physics Letters,2004,84:1880. |
[6] | Kogelink H .Coupled Wave Theory for Thick Hologram Gratings[J].Bell System Technical Journal,1969,48:2909. |
[7] | Bryan D A;Gerson R;Tomaschke H E .Increased Optical Damage Resistance in Lithium Niobate[J].Applied Physics Letters,1984,44:847. |
[8] | Polgár K et al.Spectroscopic and Electrical Conductivity Investigation of Mg Doped LiNbO3[J].Solid State Communications,1986,59:375. |
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