摘要
测试了一组掺杂不同浓度Ti、Mg杂质的LiNbO3:Ti:Mg晶体的ON-谱，用光斑法观察了这组样品的光折变特性，实验结果表明，在LiNbO3:Ti:MgI晶体中，钛可以起到复合镁的作用，使得LiNbO3晶体的掺镁阈值浓度增高，并且掺镁阈值浓度始终大于接钛浓度，提出了[Ti·Mg]的复合杂质模型，能很好地解释实验现象，根据这种模型和实验证明：LiNbO3:Ti晶体中掺入大于Ti浓度5％mol以上的Mg，晶体仍可成为抗光折变的。
The OH-- absorption spectra and photorefration property of Mg/Ti -- doped LiNbO3 crystals have been studied. The results show that in LiNbO3: Mg':Ti crastal Ti ions can neutralize Mg ions and make Mg-doping treshold raise. Finding Mg-doping threshold concentration always is higher than Ti-doping concentration. We raise a model of compound impury [Ti· Mg ]. It is very good to explain the case. According to the model and experiment demonstrate that LiNbO3: Ti : Mg crystal can become resisting photorefraction crystal when Mg--doping concentration is 5 % mol higher than Ti-doping concentration.
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
1997年第3期29-32,共4页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
内蒙古教育厅科研基金
关键词
光折变
掺镁阈值
LINBO3
晶体
光谱
photorefraction, Mg-doping threshold, compound impury center
