摘要
采用Czochralski技术生长了掺In摩尔分数分别为1%,2%和3%的In∶Fe∶LiNbO3晶体。测试In∶Fe∶LiNbO3晶体的红外光谱发现:3%In∶Fe∶LiNbO3晶体的OH-吸收峰由Fe∶LiNbO3晶体的3484cm-1位移到3507cm-1。首次以全息法研究了In∶Fe∶LiNbO3晶体波导基片光折变灵敏度。研究表明:晶体波导基片的光折变灵敏度大小顺序为Fe∶LiNbO3>1%In∶Fe∶LiNbO3>2%In∶Fe∶LiNbO3>3%In∶Fe∶LiNbO3。采用锂空位模型讨论了3%In∶Fe∶LiNbO3晶体OH-吸收峰位移的机理。讨论了In∶Fe∶LiNbO3晶体波导基片光折变灵敏度减弱和抗光折变能力增强的机理。
In∶Fe∶LiNbO_3 crystals doped-indium in different concentrations with 1%, 2% and 3 %( in mole) were grown by the Czochralski method. The infrared spectra of the crystals were measured, and the results show that the OH^- absorption peak of 3% In∶Fe∶LiNbO_3 crystal shifts to 3 507 cm^(-1) from 3 484 cm^(-1) of Fe∶LiNbO_3 crystal. The photorefractive sensitivity of In∶Fe∶LiNbO_3 waveguide substrates were studied by the holographic method for the first time. The results show that in the order of number of the photorefractive sensitivity of In∶Fe∶LiNbO_3 waveguide substrates are Fe∶LiNbO_3 >(1% In∶)Fe∶LiNbO_3 >2% In∶Fe∶LiNbO_3 >3% In∶Fe∶LiNbO_3. The shift mechanism of OH^- absorption peak of 3% In∶(Fe∶)LiNbO_3 crystal was discussed based on the Lisite vacancy model, and the mechanisms of the decrease in photorefractive sensitivity and the increase in optical damage resistance ability of In∶Fe∶LiNbO_3 waveguide substrates were discussed too.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2004年第4期476-480,共5页
Journal of The Chinese Ceramic Society
基金
国家重大基础研究973(G19990330)
国家"863"高新技术计划(2001AA31304)资助项目。~~
关键词
双掺铟和铁铌酸锂
光折变
波导基片
引上法晶体生长
lithium niobate doubly doped with indium and iron
photorefractive
waveguide substrate
Czochralski method
