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采用熔体提拉法生长了不同掺杂浓度的Ti：Fe：LiNbO3晶体．研究了掺杂杂质离子浓度变化对晶体光折变性能的影响，测定了晶体经热化学还原处理前后的透射谱．用ESR方法证实，未经还原处理时，Ti：Fe：LiNbO3晶体中Ti离子以Ti4+形式存在．与Fe：LiNbO3和Ti：LiNbOa相比，Ti、Fe复合掺杂，通过电荷补偿效应，使未经还原处理的晶体中Fe2+增加，从而使光吸收增强；可以通过改变Ti、Fe掺杂浓度的方法来控制晶体中Fe2+离子的浓度，达到控制并改善晶体光折变性能的目的．本文还对Ti：Fe：LiNbO3晶体的全息性能进行了研究，测得Ti：Fe：LiNbO3晶体响应时间缩短，衍射效率高达90％以上．Ti：Fe：LiNbO3晶体是一种优质的光折变材料．
Ti: Fe: LiNbO3 crystals with different doping concentration were grown by melt pulling method. The effect of doping impurity ion concentration on the photorefractive properties of the crystal was studied. The transmission spectrum of the crystal before and after the thermochemical reduction was measured. ESR method confirmed that, without reduction treatment, Ti: Fe: LiNbO3 crystal Ti ions exist as Ti4 +. Compared with Fe: LiNbO3 and Ti: LiNbOa, Ti and Fe are doped in a complex manner, and the charge compensation effect makes Fe2 + increase in the crystal without reduction so as to enhance light absorption. By changing the doping concentration of Ti and Fe Method to control the concentration of Fe2 + ions in the crystal to achieve the purpose of controlling and improving the photorefractive properties of the crystal. In this paper, the holographic properties of Ti: Fe: LiNbO3 crystal were also studied. The response time of Ti: Fe: LiNbO3 crystal was shortened and the diffraction efficiency was over 90%. Ti: Fe: LiNbO3 crystals are a good photorefractive material.