Enhanced 2.7 μm emission and its origin in Nd3+/Er3+ codoped SrGdGa3O7 crystal

被引:31
|
作者
Wang, Yan [1 ]
Li, Jianfu [1 ]
You, Zhenyu [1 ]
Zhu, Zhaojie [1 ]
Xu, Jinlong [1 ]
Tu, Chaoyang [1 ]
机构
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys CAS, Fuzhou 350002, Fujian, Peoples R China
基金
中国国家自然科学基金;
关键词
2.7 mu m emission; SrGdGa3O7 single crystal; Nd3+/Er3+ codoping; Radiative energy transfer; Spectroscopy; ENERGY-TRANSFER; GROWTH; ER3+;
D O I
10.1016/j.jqsrt.2014.08.017
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Nd3+ sensitized Er3+:I-4(11/2)-> I-4(13/2) mid-infrared (MIR) emission around 2.7 mu m was achieved in SrGdGa3O7 single crystal for the first time. The effect of Nd3+ on the absorption, near-infrared (NIR) and MIR fluorescence properties of Er3+ ions were investigated. It is found that Nd3+ greatly improves the absorption pump efficiency and thus enhances the Er3+ similar to 2.7 mu m emission by nearly 10 times under 808 nm laser diode (LD) excitation, at the same time quenches the 1.5 mu m near-infrared emission of the lower level Er3+:I-4(13/2) and thus suppresses the self-saturation problem effectively. The luminescent mechanism for the Nd3+/Er3+:SrGdGa3O7 crystal was analyzed and the possible energy transfer processes were proposed. The energy transfer efficiencies of Nd:F-4(3/2)->:(ErI11/2)-I-4 and Er:I-4(13/2)-> Nd:I-4(15/2) are estimated to be 85.8% and close to 100%, respectively. The results indicate that the introduction of Nd3+ is very beneficial in achieving 2.7 mu m laser in Er3+:SrGdGa3O7 crystal which could act as a potential gain media for LD pumped MIR laser. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:253 / 257
页数:5
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