Nd∶CaYAlO4单晶光纤的生长及光谱性能研究

摘要/Abstract

摘要： 采用微下拉法生长了不同掺杂浓度(0.25%,0.50%,0.75%,1.00%,原子数分数)的Nd∶CaYAlO₄单晶光纤。通过X射线衍射测试了单晶光纤晶体结构,结果表明晶体结构为四方晶系。测试了Nd∶CaYAlO₄单晶光纤的室温偏振吸收和荧光光谱,测试样品在807 nm附近有很强的吸收。其中,1.00%Nd∶CaYAlO₄的吸收最强,在σ偏振方向的吸收系数为4.20 cm^-1,π偏振方向的吸收系数为4.06 cm^-1。1.00%Nd∶CaYAlO₄单晶光纤最强发射峰在σ和π偏振下都位于1 080 nm,σ偏振方向的发射带宽为17.7 nm,π偏振方向的发射带宽为17.8 nm。0.25%、0.50%、0.75%、1.00%掺杂浓度的Nd∶CaYAlO₄单晶光纤⁴F_3/2能级的荧光寿命分别为129、133、135和140 μs,未观察到浓度猝灭。结果表明Nd∶CaYAlO₄单晶光纤是有潜力的超快激光增益介质。

关键词: 微下拉法, 单晶光纤, Nd∶CaYAlO₄, 晶体生长, 光谱性能

Abstract: Nd∶CaYAlO₄ single crystal fibers with different atom number fraction (0.25%, 0.50%, 0.75%, 1.00%) were grown by the micro-pull-down method. The crystal structure of the single crystal fiber was tested by X-ray diffraction (XRD), and the results show that the crystal structure is tetragonal. The polarization absorption and fluorescence spectra of Nd∶CaYAlO₄ single crystal fibers were tested at room temperature, and the samples have strong absorption near 807 nm. Among them, the absorption of 1.00%Nd∶CaYAlO₄absorption is the strongest, and the absorption coefficients for σ and π polarization are 4.20 and 4.06 cm^-1, respectively. The strongest emission peaks of 1.00%Nd∶CaYAlO₄ single crystal fiber are at 1 080 nm in both σ and π polarization. The emission bandwidths are 17.7 and 17.8 nm for σ and π polarization, respectively. The fluorescence lifetime of 0.25%, 0.50%, 0.75% and 1.00%Nd∶CaYAlO₄ single crystal fibers are 129, 133, 135 and 140 μs, respectively, and no concentration quenching is observed. The results show that Nd∶CaYAlO₄ single crystal fiber is a potential gain medium for ultrafast lasers.

Key words: micro-pulling-down method, crystal fiber, Nd∶CaYAlO₄, crystal growth, spectral property

中图分类号:

TN253

郭俊, 刘坚, 陈鹏, 宋青松, 张志恒, 徐晓东, 徐军. Nd∶CaYAlO₄单晶光纤的生长及光谱性能研究[J]. 人工晶体学报, 2023, 52(7): 1345-1351.

GUO Jun, LIU Jian, CHEN Peng, SONG Qingsong, ZHANG Zhiheng, XU Xiaodong, XU Jun. Growth and Spectral Properties of Nd∶CaYAlO₄ Single Crystal Fibers[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(7): 1345-1351.

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Nd∶CaYAlO₄单晶光纤的生长及光谱性能研究

Growth and Spectral Properties of Nd∶CaYAlO₄ Single Crystal Fibers

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