综述了四价掺杂(包括铪和锆)铌酸锂晶体的研究进展.掺铪铌酸锂晶体具有与掺镁铌酸锂晶体相似的抗光 折变性能，而掺锆铌酸锂晶体的抗光折变性能远优于掺镁铌酸锂晶体.铪铁双掺与锆铁双掺铌酸锂晶体兼有高光 折变灵敏度和高光折变衍射效率的性质.并且在掺杂量超过阈值时，铪离子和锆离子在铌酸锂晶体中都具有接近 于1的有效分凝系数.这些实验结果表明，四价掺杂铌酸锂有望成为出色的非线性光学晶体.

The recent progress of HfO 2 and ZrO 2 doped LiNbO 3 crystals was reviewed. LN:Hf crystal has similar optical damage resistance as LN:Mg， but LN:Zr has much better property than LN:Mg. LN:Fe，Hf and LN:Fe，Hf crystals have both fast photorefractive response speed and high saturation diffraction efficiency. And the distribution coefficient of ZrO 2 in LiNbO 3 is close to one. These results indicate that the tetravalent ions doped LiNbO 3 will be the excellent nonlinear optical crystals.