Intensities and spectral features of the ^4I13/2-^4I15/2 potential laser transition of Er^3＋ centers in CaF2-CeF3 disordered crystal

A CaF2-CeF3 disordered crystal containing 1.06% of Er^3＋ ions was grown by the temperature gradient technique.Optical absorption and emission spectra recorded at room temperature and at 10 K, luminescence decay curve recorded at room temperature, and extended x-ray-absorption fine structure spectra...

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Published in:中国物理B：英文版 2017, Vol.26 (11), p.239-246
Main Authors: 王庆国, 苏良碧, 刘军芳, 刘斌, 吴锋, 罗平, 赵衡煜, 施佼佼, 薛艳艳, 徐晓东, Witold Ryba-Romanowski, Piotr Solarz, Radoslaw Lisiecki, 王占山, 唐慧丽, 徐军
Format: Article
Language:English
Subjects:
光谱特征
发光光谱
发射光谱
强度
扩展X射线吸收精细结构谱
无序
晶体生长
激光跃迁
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Summary:A CaF2-CeF3 disordered crystal containing 1.06% of Er^3＋ ions was grown by the temperature gradient technique.Optical absorption and emission spectra recorded at room temperature and at 10 K, luminescence decay curve recorded at room temperature, and extended x-ray-absorption fine structure spectra were analyzed with an intention to assess the laser potential related to the ^4I13/2→^4I15/2 transition of Er^3＋. In addition, the thermal diffusivity of the crystal was measured at room temperature. The analysis of room-temperature spectra revealed that the ^4I13/2 emission is long-lived with a radiative lifetime value of 5.5 ms, peak emission cross section of 0.73 × 10^-20 cm^2, and large spectral width pointing at the tunability of the emission wavelength in the region stretching from approximately 1480 nm to 1630 nm. The energies of the crystal field components for the ground and excited multiplets determined from low-temperature absorption and emission spectra made it possible to predict successfully the spectral position and shape of the room-temperature ^4I13/2→^4I15/2 emission band. Based on the correlation of the optical spectra and dynamics of the luminescence decay, it was concluded that in contrast to Yb^3＋ ions in heavily doped CaF2 erbium ions in the CaF2-CeF3 crystal reside in numerous sites with dissimilar relaxation rates.
ISSN:1674-1056
2058-3834