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中文摘要：
以LiF：YF3：NdF3=51．5：47．5：1为原料摩尔比，在50～60℃／cm固液界面温度梯度下，采用密封的坩埚下降法制备了尺寸为410mm×50mm的高质量Nd3＋掺杂LiYF4单晶，并对产物的物相结构和光谱性能进行表征。结果表明，Nd3＋在807nm处的最大吸收系数α=1．96cm^-1，吸收跃迁截面为0．973×10^-20cm^2。在808nmLD激发下，测定了样品的荧光光谱和及最强荧光峰1050nm（^4F3/2→＋4I11/2）的荧光寿命（～451．0μs），并计算得到1050nm的最大受激发射跃迁截面为1．60×10^-19cm^2。
英文摘要：
High quality of Nd3＋ doped LiYF4 single crystal with size of φ10 mm × 50 mm was grown by Bridgman method using the composition of the raw material LiF： YF3： NdF3 =51.5： 47.5：1 in molar ratio taking the closed crucible and about 50-60 ℃/cm for the temperature gradient of the solid-liquid interface. The phase structure and spectra properties of the product were characterized. The calculated maximum absorption coefficient at 807 nm was 1.96 cm-1, and the calculated absorption cross section was 0.973 ×10^-20cm^2. The fluorescence spectrum and the lifetime of the strongest luminesce at 1050 nm （^4F3/2→＋4I11/2） excited by 808 nm were also determined. The lifetime for the transition was 451.0 μs, and the calculated maximum emission cross section was 1.60× 10^-19 cm^2.
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