坩锅下降法生长Nd～(3+)∶LiYF_4单晶及其光谱性能研究  

Study on Spectra Properties of Nd～(3+)∶ LiYF_4 Single Crystal Grown by Bridgman Method

作　　者：汪沛渊[1] 夏海平[1] 彭江涛[1] 唐磊[1] 胡皓阳[1] 

机构地区：[1]宁波大学光电子功能材料重点实验室,宁波315211

出　　处：《人工晶体学报》2013年第9期1729-1734,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51272109;50972061;61275180);浙江省自然科学基金(R4100364;Z4110072);宁波市自然科学基金(2012A610115);宁波大学王宽诚幸福基金

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φ10 mm×50 mm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807 nm处的最大吸收系数α=1.96 cm-1,吸收跃迁截面为0.973×10-20cm2。在808 nm LD激发下,测定了样品的荧光光谱和及最强荧光峰1050 nm(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1.60×10-19cm2。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.

关 键 词：Nd3+∶LiYF4单晶 坩锅下降法 吸收光谱 荧光光谱 

分 类 号：O782[理学—晶体学]