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采用提拉法以固液同成分配比(Li2CO3/Nb2O5=48.6/51.4)生长了Fe掺杂及(Zn,Fe)、(Mg,Fe)和(Ce,Fe)双掺杂LiNbO3(LN)单晶。Ce∶Fe∶LiNbO3晶体的质量,指数增益系数和衍射效率皆高于Fe∶LiNbO3晶体。所测得(Zn,Fe)∶LN、(Ce,Fe)∶LN、(Mg,Fe)∶LN和Fe∶LiNbO3晶体的抗光致散射能力分别为8.2×103,3.2×102,8.3×102和1.2×102W/cm3;在488nm光进行的光折变实验中还原处理后的(Ce,Fe)∶LiNbO3晶体具有最高的二波耦合增益系数,为40.2cm-1,其全息衍射效率可达82.2%;实验结果表明(Zn,Fe)∶LiNbO3和(Mg,Fe)∶LiNbO3具有抗光散射能力强,响应时间短的特点,而(Ce,Fe)∶LiNbO3的增益系数和衍射效率均为最高,明显优于Fe∶LiNbO3晶体。
Czochralski (Fe) and (Zn, Fe), (Mg, Fe) and (Ce, Fe) doping were grown by the Czochralski method with the solid-liquid ratio of Li2CO3 / Nb2O5 = 48.6 / LiNbO3 (LN) single crystal. The mass, exponential gain coefficient and diffraction efficiency of Ce: Fe: LiNbO3 crystal are higher than that of Fe: LiNbO3 crystal. The measured values of (Zn, Fe): LN, (Ce, Fe): LN, (Mg, Fe): LN and Fe: LiNbO3 were 8.2 × 103,3.2 × 102 , 8.3 × 102 and 1.2 × 102W / cm3, respectively. The photoluminescence experiments at 488nm showed that the (Ce, Fe): LiNbO3 crystals had the highest two-wave coupling gain coefficient of 40.2cm The results show that (Zn, Fe): LiNbO3 and (Mg, Fe): LiNbO3 have the characteristics of strong light scattering ability and short response time, while the (Ce, Fe ): The gain coefficient and diffraction efficiency of LiNbO3 are the highest, obviously better than Fe: LiNbO3 crystal.