为了测试Mg∶Er∶LiNbO₃晶体的光损伤阈值和红外光谱，采用Czochralski技术生长出优质的Mg_x∶Er_y∶LiNbO₃(x=0．02，0．04，0．06，0．08，y=0．01(摩尔分数))晶体。通过实验得出Mg(0．06)∶Er∶LiNbO₃和Mg(0．08)∶Er∶LiNbO₃晶体抗光损伤阈值比LiNbO₃晶体提高2个数量级以上，且它们的红外光谱OH^－吸收峰移到3535cm^－1附近；在波长510nm～580nm范围内得到Mg∶Er∶LiNbO₃晶体稳态发射谱。结果表明，Mg²⁺浓度增加抗光损伤能力增加，掺进摩尔分数为0．04的MgO是Mg∶Er∶LiNbO₃晶体寿命最长的晶体。

In order to measure the photo damage threshold and infrared spectra of Mg∶ Er∶ LiNbO₃ crystals,the high quality Mg_x∶ Er_y ∶ LiNbO₃(x = 0.02,0.04,0.06,0.08,y =0.01(mole fraction))crystals were grown by Czochralski technique. The experiment indicated that the photo damage resistance ability of Mg(0.06)∶ Er∶ LiNbO₃ and Mg(0.08)∶ Er∶LiNbO₃ crystals improved the two orders magnitude over higher than that of LiNbO₃ crystals and their OH ^- absorption peak of infrared spectra shifts to 3535cm ^-1 nearby. The experiment gained the steady state shoot spectra of Mg∶Er∶LiNbO₃ crystals in wavelength 510nm 580nm finding doped with mole fraction 0.04 of MgO. The results showed that the Mg²⁺ concentration increased the photo damage resistance ability increased and the lifetime of Mg∶Er∶LiNbO₃ crystal doped with mole fraction 0.04 of MgO was the longest.