近化学计量比Ce∶Mn∶LiNbO_3晶体光折变性能研究  

Research on Photorefractive Properties of Near Stiometric Ce∶Mn∶LiNbO_3 Crystals

作　　者：杨春晖[1] 许艳波[1] 王锐[1] 徐玉恒[1] 

机构地区：[1]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《光子学报》2007年第5期909-911,共3页Acta Photonica Sinica

基　　金：国家自然科学基金(E50202005);黑龙江省科技攻关项目资助

摘　　要：在LiNbO3中掺进0 .015mass%MnCO3和0 .1mass%CeO2,以Czchralski法生长Li/Nb比为1.38的近化学计量比Ce∶Mn∶Li NbO3(Ce∶Mn∶SLN)晶体和Li/Nb比为0.946的同成分Ce∶Mn∶Li NbO3(Ce∶Mn∶CLN)晶体.测试了晶体的红外光谱和紫外可见吸收光谱,讨论了Ce∶Mn∶SLN晶体OH-吸收峰和吸收边移动机理.利用二波耦合光路测试了晶体的指数增益系数,Ce∶Mn∶SLN晶体指数增益系数Γ达到27cm2-.同时,研究了Ce∶Mn∶SLN指数增益系数提高的机理.CeO2（0.1 wt%）：MnCO3（0.1 wt%）：LN crystals with different Li/Nb ratios（ 1.38, 0.946） were grown by Czochralski method.The crystals are near stoichiometric LiNbO3（SLN）crystals when the Li/Nb ratio is 1.38, while it is congruent LiNbO3（CLN） crystals when the Li/Nb ratio is 0.946. The IR spectra and the UV-absorption spectra were tested.The mechanism of the movement of the OH-vibration peak and the absorption edge were discussed. The exponential gain coefficient of Ce∶Mn∶LN crystals were measured with two-beam coupling, which of Ce∶Mn∶SLN crystals reach to 27 cm-2, and the mechanisms of the improvement of the exponential gain coefficient were studied.

关 键 词：Ce:Mn:LiNbO3晶体 晶体生长 指数增益系数 

分 类 号：O742.9[理学—晶体学]