Ce：Mn：LiNbO3晶体紫外记录研究

采用紫外光作记录光在Ce：Mn：LiNbO3晶体中实现非挥发全息记录，灵敏度可达0．0803cm／J，衍射效率（固定）为5．07％，比采用红光为记录光，紫外光为敏化光的非挥发双中心记录方案均提高了50多倍。分析表明，采用紫外光作为记录光，深能级电子被激发比例极大提高，参与光折变过程的电子平均运动周期变短．提高了衍射效率和灵敏度；深浅能级电子光栅的同相位，使得固定空间电荷场变强。文中还研究了退火对记录性能的影响。

Nonvolatile holographic recording is performed with recording UV beams (364 nm) in Ce∶Mn∶LiNbO3 crystals, both the sensitivity and the fixed diffraction efficiency can be improved more than 50 times of that in two-center recording scheme with recording red beams (633 nm). It is analyzed that in this UV recording system, a larger proportion of the electrons are excited and the average movement cycle of electrons involved in photorefrative procedure becomes shorter; the deep and shallow center being in phase makes the fixed space-charge field stronger. The effect of annealing also is studied.