Near-infrared emission properties and energy transfer of Tm3+-doped and Tm3+/Dy3+-codoped chalcohalide glasses

被引：11
|
作者：
Tang, Gao [1 ,2 ]
Liu, Cunming [1 ,2 ]
Yang, Zhiyong [1 ]
Luo, Lan [1 ]
Chen, Wei [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 11期
关键词：
D O I：
10.1063/1.3040030
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Near-infrared emission properties of Tm3+ in GeSe2-Ga2Se3-CsI glasses were investigated. The increase in emission intensity ratio I-1.47 mu m/I-1.22 mu m and the large increase in the lifetime of the Tm3+:H-3(4) level from 189 to 2480 mu s can be obtained as CsI concentration changes from 20% to 40%. These improved emission properties result from the appearance of I-containing structural units, which have low phonon energy and are located near the Tm3+ ions, dominating the multiphonon relaxation and cross relaxation. Radiative parameters of Tm3+ were calculated based on the Judd-Ofelt analysis. The potential use of Tm3+-doped GeSe2-Ga2Se3-CsI glasses for S-band fiber amplifiers was discussed. Additionally, the intensity and lifetime of 1.2, 1.3, and 1.47 mu m infrared fluorescence on Tm3+/Dy3+-codoped GeSe2-Ga2Se3-CsI glasses were studied, and the energy transfer mechanisms were discussed. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3040030]
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页数：6
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