三元同成分掺镁铌酸锂晶体的生长与抗光损伤性能研究
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摘要
以三元同成分为基础配料,生长了掺杂浓度为6.5mol%、7.5mol%的掺镁铌酸锂晶体,并与传统的掺镁5.0mol%(Li/Nb=48.38/51.62)铌酸锂晶体作对比。光斑畸变法实验表明所生长的掺镁晶体的抗光损伤能力均达到5×105W/cm2,与掺镁5.0mol%同成分铌酸锂晶体相近。全息法测得晶体最大折射率变化分别为4.39×10-6、4.61×10-6,而掺镁5.0mol%晶体为5.62×10-6。晶体的红外光谱和紫外-可见吸收谱显示,所生长的掺镁6.5mol%、7.5mol%晶体均已超过掺杂阈值。综上可知,采用三元同成分配比是获得高质量晶体的有效途径。
According to the ternary congruent composition,Li Nb O3 crystals doped with Mg O(6. 5 mol%,7. 5 mol%) were grown,and then in order to compare,the congruent Mg-doped LN(5. 0 mol%) was also grown. The experiment results show that the optical damage resistance ability of the grown crystals reached 5 × 105 W/cm2,which is four orders of magnitude higher than that of congruent pure Li Nb O3 crystal,which is the same as that of Li Nb O3∶ Mg crystal(5. 0 mol%). The maximum refractive index change of the grown crystals is 4. 39 × 10-6,4. 61 × 10-6,respectively,which is lower than that of Li Nb O3∶ Mg(5. 0 mol%) crystal,which is 5. 62 × 10-6. The OH absorption spectra and UV-Vis absorption spectra shows that,the doping concentrations of Mg ions both in Mg(6. 5 mol%) ∶ LN,and Mg(7. 5 mol%) ∶ LN beyond the threshold. Therefore,it is the effective way to obtain the high quality crystal by using the ternary congruent method.
According to the ternary congruent composition,Li Nb O3 crystals doped with Mg O(6. 5 mol%,7. 5 mol%) were grown,and then in order to compare,the congruent Mg-doped LN(5. 0 mol%) was also grown. The experiment results show that the optical damage resistance ability of the grown crystals reached 5 × 105 W/cm2,which is four orders of magnitude higher than that of congruent pure Li Nb O3 crystal,which is the same as that of Li Nb O3∶ Mg crystal(5. 0 mol%). The maximum refractive index change of the grown crystals is 4. 39 × 10-6,4. 61 × 10-6,respectively,which is lower than that of Li Nb O3∶ Mg(5. 0 mol%) crystal,which is 5. 62 × 10-6. The OH absorption spectra and UV-Vis absorption spectra shows that,the doping concentrations of Mg ions both in Mg(6. 5 mol%) ∶ LN,and Mg(7. 5 mol%) ∶ LN beyond the threshold. Therefore,it is the effective way to obtain the high quality crystal by using the ternary congruent method.
引文
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[9]Kong Y F,Wen J K,Wang H F.New Doped Lithium Niobate Crystal with High Resistance to Photorefraction-Li Nb O3:In[J].Applied Physics Letters,1995,66(3):280-281.
[10]Yamamoto J K,Kitamura K,Iyi N,et al.Increased Optical Damage Resistance in Sc2O3-doped Li Nb O3[J].Applied Physics Letters,1992,61(18):2156.
[11]Volk T R,Pryalkin V I,Rubinina N M.Optical-damage-resistant Li Nb O3:Zn crystal[J].Optics Letters,1990,15(18):996-998.
[12]Razzari L,Minzioni P,Cristiani I,et al.Photorefractivity of Hafnium-doped Congruent Lithium-niobate Crystals[J].Applied Physics Letters,2005,86(13):131914.
[13]Wang L Z,Liu S G,Kong Y F,et al.Increased Optical-damage Resistance in Tin-doped Lithium Niobate[J].Optics Letters,2010,35(6):883-885.
[14]Staebler D L,Amodei J J.Coupled-wave Analysis of Holographic Storage in Li Nb O3[J].Journal of Applied Physics,1972,43(3):1042-1049.
[15]Arsenev P A,Baranov B A.Properties of the Ions of the Iron Transition Group in the Lattice of Single-crystalline Lithium Niobate[J].Physica Status Solidi(a),1972,9(2):673-677.
[16]Bryan D A,Gerson R,Tomaschke H E.Increased Optical Damage Resistance in Lithium Niobate[J].Applied Physics Letters,1984,44(9):847.
[17]Peter A,Polgar K,Kovacs L,et al.Threshold Concentration of Mg O in Near-stoichiometric Li Nb O3Crystals[J].Journal of Crystal Growth,2005,284(1-2):149-155.
[18]Zhong J G,Xu G F,Wang T F,et al.The Growth and the Frequency Doubling Characters of Heavily Doped Mg:Li Nb O3Crystals[J].Acta Physica Sinica,1983,32(6):795-798.
[2]Zhong G G,Jin J,Wu Z K.Measurements of Optically Induced Refractive Index Damage of Lithium Niobate Doped with Different Concentrations of Mg O[J].Proeeedings of the 11th International Quantum Electronics Conference,1980,80:631.
[3]Grabmaier B C,Otto F.Growth and Investigation of Mg O-doped Li Nb O3[J].Journal of Crystal Growth,1986,79(1-3):682-688.
[4]Buse K,Holtmann L,Kratzig E.Activation of Ba Ti O3for Infrared Holographic Recording[J].Optics Communications,1991,85:183-186.
[5]Tan H R,Ma Y X,Zhu Q B,et al.Segregation in Mg O-doped Congruent Li Nb O3[J].Journal of Crystal Growth,1994,142(1):111-116.
[6]Zhou Y F,Wang J C,Wang P L,et al.Mg O-doping Effects on the Congruent Composition of Li Nb O3[J].Journal of Crystal Growth,1991,114(1):87-91.
[7]Kimura H,Uda S.Conversion of Non-stoichiometry of Li Nb O3to Constitutional Stoichiometry by Impurity Doping[J].Journal of Crystal Growth,2009,311(16):4094-4101.
[8]Kimura H,Taniuchi T,Iida S,et al.Bulk Crystal Growth of Congruent Mg O-doped Li Nb O3Crystal with Stoichiometric Structure and its Secondharmonic-generation Properties[J].Journal of Crystal Growth,2010,312(23):3425-3427.
[9]Kong Y F,Wen J K,Wang H F.New Doped Lithium Niobate Crystal with High Resistance to Photorefraction-Li Nb O3:In[J].Applied Physics Letters,1995,66(3):280-281.
[10]Yamamoto J K,Kitamura K,Iyi N,et al.Increased Optical Damage Resistance in Sc2O3-doped Li Nb O3[J].Applied Physics Letters,1992,61(18):2156.
[11]Volk T R,Pryalkin V I,Rubinina N M.Optical-damage-resistant Li Nb O3:Zn crystal[J].Optics Letters,1990,15(18):996-998.
[12]Razzari L,Minzioni P,Cristiani I,et al.Photorefractivity of Hafnium-doped Congruent Lithium-niobate Crystals[J].Applied Physics Letters,2005,86(13):131914.
[13]Wang L Z,Liu S G,Kong Y F,et al.Increased Optical-damage Resistance in Tin-doped Lithium Niobate[J].Optics Letters,2010,35(6):883-885.
[14]Staebler D L,Amodei J J.Coupled-wave Analysis of Holographic Storage in Li Nb O3[J].Journal of Applied Physics,1972,43(3):1042-1049.
[15]Arsenev P A,Baranov B A.Properties of the Ions of the Iron Transition Group in the Lattice of Single-crystalline Lithium Niobate[J].Physica Status Solidi(a),1972,9(2):673-677.
[16]Bryan D A,Gerson R,Tomaschke H E.Increased Optical Damage Resistance in Lithium Niobate[J].Applied Physics Letters,1984,44(9):847.
[17]Peter A,Polgar K,Kovacs L,et al.Threshold Concentration of Mg O in Near-stoichiometric Li Nb O3Crystals[J].Journal of Crystal Growth,2005,284(1-2):149-155.
[18]Zhong J G,Xu G F,Wang T F,et al.The Growth and the Frequency Doubling Characters of Heavily Doped Mg:Li Nb O3Crystals[J].Acta Physica Sinica,1983,32(6):795-798.
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