Effect of OH- on fluorescence properties in 1.5-1.6 μm for Er:Yb:YCOB crystal

被引：4
|
作者：
Zhong, Degao [1 ,2 ]
Hu, Chen [1 ,2 ]
Ullah, Shakir [1 ,2 ]
Xu, Hui [3 ]
Li, Jianhong [3 ]
You, Fei [1 ,2 ]
Wang, Dongjuan [4 ]
Sun, Shijia [1 ,2 ]
Kong, Weijin [1 ]
Tang, Jie [1 ]
Yu, Zhenghe [1 ,2 ]
Teng, Bing [1 ,2 ]
机构：
[1] Qingdao Univ, Coll Phys, Qingdao 266071, Shandong, Peoples R China
[2] Qingdao Univ, Natl Demonstrat Ctr Expt Appl Phys Educ, Qingdao 266071, Shandong, Peoples R China
[3] CRYSTECH Inc, Qingdao 266107, Shandong, Peoples R China
[4] Weifang Business Vocat Coll, Inst Engn Mat, Weifang 262234, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2019年 / 37卷 / 09期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Er:Yb:YCOB crystal; OH-; ions; Fluorescence output efficiency; Energy transfer process; Rare earths; DIODE-PUMPED ER; CONTINUOUS-WAVE; LASER OPERATION; SPECTROSCOPIC PROPERTIES; FTIR SPECTROSCOPY; GROWTH; DEFECTS; ABSORPTION; LINBO3;
D O I：
10.1016/j.jre.2018.11.015
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
FTIR absorption spectra indicate that H+ can easily enter the crystal structure and form OH- centers in Er:Yb:YCOB and O-H bonds prefer to lie in the a-c plane. Within our current studied concentration level, crystal samples with higher OH- absorption coefficients demonstrate stronger fluorescence intensity and longer fluorescence lifetime at 1535 nm. As the stretching vibration energy of OH- group approximately corresponds to the energy gap between the I-4(11/2) and I-4(13/2) levels of Er3+, and thus, OH(- )ions can shorten the fluorescence lifetime of Er3- -I-4(11/2) level by the phonon-assisted cross-relaxation process between the Er3+ and OH- ions. Our current results confirm that a certain content of OH- ions can enhance the energy transfer process from Yb3+ to Er3+ and subsequently promote fluorescence output in 1.5-1.6 mu m. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：924 / 930
页数：7
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