Growth of YbF3-doped CaF2 crystals and characterization of Yb3+/Yb2+ conversion

被引：28

作者：

Nicoara, Irina ^{[1
]}

Stef, Marius ^{[1
]}

Pruna, Andreea ^{[1
]}

机构：

[1] W Univ Timisoara, Dept Phys, Timisoara 300322, Romania

来源：

JOURNAL OF CRYSTAL GROWTH | 2008年 / 310卷 / 7-9期

关键词：

defects; directional solidification; impurities; Bridgman technique; calcium compounds; rare earth compounds;

D O I：

10.1016/j.jcrysgro.2007.11.066

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Calcium fluoride crystals doped with YbF3 and PbF2-, NaF- and LiF-codoped were grown using the vertical Bridgman method. Transparent, high quality, with various high Yb2+ contents in the as-grown crystals has been obtained using a special procedure. The optical absorption spectra reveal the characteristic ultraviolet (UV) absorption bands of the divalent Yb ions. Influence of the codoping with Pb2+, Li+ and Na+ ions on the absorption spectra and on the Yb2+ ions content has been studied. High-intensity emission bands in the near-UV spectral region, not reported before, have been observed for excitation by 230 nm. A comparison of our results with those obtained by other authors is also given. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1470 / 1475

页数：6

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