摘要
在Mn∶Fe∶LiNbO3中掺进 6%MgO(摩尔分数 )采用Czochralski技术生长Mg∶Mn∶Fe∶LiNbO3晶体。晶体在Li2 CO3粉末中经 5 0 0℃下2 4h的还原处理和在Nb2 O3粉末中经 110 0℃下 10h的氧化处理。晶体的测试结果表明 ,Mg∶Mn∶Fe∶LiNbO3晶体的抗光散射能力比Mn∶Fe∶LiNbO3晶体提高 1个数量级以上。采用He-Ne激光作为记录光 ,紫外光作选通光 ,用双光子法测试Mg∶Mn∶Fe∶LiNbO3晶体二波耦合衍射效率。双光子稳态衍射效率为 η0 =5 2 % ,固定衍射效率为 ηG=2 9% ,记录时间为 40min ,记录速度比Mn∶Fe∶LiNbO3晶体提高 3倍。对记录光。
Mg∶Mn∶Fe∶LiNbO 3 crystals were grown by Czochralski method for the first time with doping 6 % (mole fraction) MgO into Mn∶Fe∶LiNbO 3. The crystals were reduced in Li 2CO 3 powder at 500 ℃ for 24 h and oxidized in Nb 2O 3 powder at 1 100 ℃ for 10 h. The measuring result shows that the photo scattering resistance ability of Mg∶Mn∶Fe∶LiNbO 3 crystals is one order of magnitude higher than that of Mn∶Fe∶LiNbO 3 crystals. Using He-Ne laser beams as the recording light and an ultraviolet beam as the gating light, the two wave coupling diffraction efficiency of Mg∶Mn∶Fe∶LiNbO 3 are measured by the two photon method. The results show that two photon stable state diffraction efficiency is 52%, fixed diffraction efficiency is 29%, and the recording time is 40 min. The recording speed of Mg∶Mn∶Fe∶LiNbO 3 is three times faster than that of Mn∶Fe∶LiNbO 3 crystals. The actions of the recording light and the gating light as well as the two photon holographic storage mechanism of triply doped LiNbO 3 crystal are studied.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第5期450-453,共4页
Journal of The Chinese Ceramic Society
基金
国家基础研究 973计划 (G19990 3 3 0 )资助项目
国家高科技发展 863计划资助项目(2 0 0 1AA3 13 0 4)
关键词
掺杂铌酸锂晶体
全息存储
衍射效率
提拉法晶体生长
doped lithium niobate crystal
holographic storage
diffraction efficiency
Czochralski method
