In:Fe:LiNbO_3晶体波导基片光折变性能的研究  

INVESTIGATION ON PHOTOREFRACTIVE PROPERTIES OF In:Fe:LiNbO_3 WAVEGUIDE SUBSTRATE

作　　者：郭亚军[1] 徐悟生[2] 张建[3] 徐玉恒[3] 

机构地区：[1]哈尔滨工程大学化工学院,哈尔滨150001 [2]哈尔滨工业大学电子科学与技术系 [3]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《硅酸盐学报》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。~~

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.

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 

分 类 号：O782.9[理学—晶体学]