摘要
比较了掺Fe量相同的两种晶体Fe :LiNbO3和Zn :Fe :LiNbO3的光折变性能 ,并且给出了Zn :Fe :LiNbO3晶体光电导和衍射效率与入射总光强的关系 .在Zn :Fe :LiNbO3晶体二波耦合实验中观察到衍射效率随记录时间的增长先增加 ,达到饱和后又逐渐减小的自擦除现象 ,并采用光折变双载流子四陷阱模型对该现象加以解释 .在此基础上选择合适的曝光时序 ,利用角度复用技术在该晶体中进行体全息存储 ,并在同一点上存入
Photorefractive properties of Zn:Fe:LiNbO 3 crystals were compared with Fe:LiNbO 3 crystals. We described the photoconduction and diffraction efficiency as a function of incident light intensity. The self_erasing of recording process in the Zn:Fe:LiNbO 3 crystal is observed. We found that the diffraction efficiency of the crystal increased to a saturation value and then decreased as recording time increases. The phenomena were explained by the double_carrier four_trap model. A suit able exposure schedule is chosen to realize the angle_multiplexed volume holographic storage. We have stored 30 images in the same volume of the crystal.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期1788-1792,共5页
Acta Physica Sinica
基金
教育部优秀青年教师资助计划
黑龙江省留学归国基金 (批准号 :LC0 1C11)
哈尔滨工业大学校基金 (批准号 :HIT2 0 0 1.3 3 )资助的课题~~
