Structure, defects, and spectroscopic properties of a Yb,Ho,Pr:YAP laser crystal
Structure, defects, and spectroscopic properties of a Yb,Ho,Pr:YAP laser crystal
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DOI：
10.1016/j.jallcom.2016.02.060
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发表时间：
2016-07
影响因子：
6.2
通讯作者：
Huili Zhang;Xiaojun Sun;Jianqiao Luo;Zhongqing Fang;Xu-yao Zhao;M. Cheng;Qingli Zhang;D. Sun
中科院分区：
文献类型：
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作者：
Huili Zhang;Xiaojun Sun;Jianqiao Luo;Zhongqing Fang;Xu-yao Zhao;M. Cheng;Qingli Zhang;D. Sun
研究了提拉法生长的Yb，Ho，Pr：YAlO 3（Yb，Ho，Pr：雅普）单晶的结构、缺陷和光谱特性。Yb ~（3+）、Ho ~（3+）和Pr ~（3+）离子在雅普基质中的有效分凝系数分别为1.06、1.32和0.90。结构参数由X射线Rietveld精修方法获得。通过X射线摇摆曲线确定了Yb，Ho，Pr：雅普的高结晶质量。用磷酸腐蚀剂对（100）、（010）和（001）面位错进行了化学腐蚀研究。吸收光谱表明，在900-1000 nm波长范围内有较强的吸收，970 nm LD激发的荧光光谱显示，最强发射位于2853 nm处，表明Yb 3+离子可以作为Ho 3+离子的敏化剂。能级寿命表明，Pr ~（3+）离子对Ho ~（3+）离子具有钝化作用。这些结果表明Yb，Ho，Pr：雅普晶体是实现2.8-3.1 μm激光输出的理想材料。
Structure, defects, and spectroscopic properties of a Yb,Ho,Pr:YAlO3(Yb,Ho,Pr:YAP) single crystal grown by the Czochralski method were investigated. The effective segregation coefficients of the Yb3+, Ho3+, and Pr3+ions are 1.06, 1.32, and 0.90 in YAP host, respectively. The structural parameters are obtained by the X-ray Rietveld refinement method. A high crystalline quality of the Yb,Ho,Pr:YAP is determined by the X-ray rocking curve. The dislocations of (100), (010), and (001) faces are studied using the chemical etching with the phosphoric acid etchant. The absorption spectra show that there exists strong absorption in the wavelength range of 900–1000 nm, and the fluorescence spectrum excited by 970 nm LD presents that the strongest emission is located at 2853 nm, indicating the Yb3+ions can be acted as the sensitizer for the Ho3+ions. The level lifetimes indicate that the Pr3+ions can play a deactivator role for the Ho3+ions. All these results imply that the Yb,Ho,Pr:YAP crystal can be regarded as a promising candidate for realizing 2.8–3.1 μm laser output.