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YAB晶体中Yb3+到Er3+的能量传递
The Energy Transfer from Yb3+ to Er3+ in YAl3(BO3)4 Crystal
- 发光学报 2009年30卷第3期 页码：321-326
- 作者机构：
1. 中国科学院 福建物质结构研究所, 福建 福州 350002
2. 江西理工大学, 江西 赣州 341000
- 作者简介：
- 基金信息：
DOI：
中图分类号： O482.31收稿日期：2008-07-29，
修回日期：1900-01-02，
网络出版日期：2009-06-30，
纸质出版日期：2009-06-30
- 稿件说明：
移动端阅览
游维雄, 黄艺东, 林炎富, 等. YAB晶体中Yb3+到Er3+的能量传递[J]. 发光学报, 2009,30(3):321-326.
YOU Wei-xiong, HUANG Yi-dong, LIN Yan-fu, et al. The Energy Transfer from Yb3+ to Er3+ in YAl3(BO3)4 Crystal[J]. Chinese journal of luminescence, 2009, 30(3): 321-326.
摘要
1.55 μm波段是光通讯的一个重要波段
而且对人眼安全
有高的大气透过率
因此可以广泛应用于通讯和遥感测距等领域。由于Er
3+
离子对商品化的InGaAs激光二极管的抽运波长不能有效吸收
因此一般通过在基质中共掺杂Yb
3+
和Er
3+
离子来获得1.55 μm波段激光输出。采用助熔剂法生长了不同Yb
3+
和Er
3+
掺杂浓度的YAl
3
(BO
3
)
4
(YAB)晶体。运用速率方程模型研究了晶体中Yb
3+
到Er
3+
能量传递过程
得到了根据Yb
3+
离子的荧光寿命计算能量传递系数的简单计算公式。计算了不同掺杂离子浓度的YAB晶体中的能量传递系数等相关参数。结果表明
在YAB晶体中
Yb
3+
到Er
3+
能量传递非常有效
YAB晶体可以作为一种能获得1.55 μm激光输出的良好介质材料。
Abstract
The laser emission around wavelength at 1.55 μm is located in the "eye-safe" region and plays an important role in the optical communication and remote sensing. However
Er
3+
-doped materials cannot be efficiently pumped by the InGaAs laser diodes because of the lower absorption of Er
3+
at the wavelength of 976 nm. Generally
the solution is to add Yb
3+
ion as a sensitizer to improve the pumping efficiency. So
in the Yb
3+
and Er
3+
co-doped materials
the pumping energy can be efficiently absorbed by Yb
3+
and transferred to Er
3+
. In this paper
YAl
3
(BO
3
)
4
crystals with different Yb
3+
and Er
3+
doping concentrations were grown by the flux method. The Yb
3+
to Er
3+
energy transfer in YAB crystals was investigated with the rate equation without considering the back energy transfer and up-conversion processes. The simple formulation for calcula-ting the energy transfer coefficients was derived according to the fluorescence lifetimes of Yb
3+
ion. The energy transfer parameters were also calculated. The results showed that the energy transfer is very efficient in the YAB crystal and the energy transfer probabilities from Yb
3+
to Er
3+
increases with the increasing of Yb
3+
concentrations. The energy transfer coefficients calculated by using experimental data are accordant with those calculated by theory
it means that the formulation is suitable for calculating the energy transfer coefficient in the high phonon energy materials. The energy transfer coefficients and critical interaction distance are comparable with or higher than those in other materials
which means that the energy transfer from Yb
3+
to Er
3+
in YAB crystal can be more efficient. So
this host could be a good candidate for the 1.55 μm laser media.
关键词
Keywords
references
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