Infrared emission properties of Dy^3 +-doped and Dy^3 +,Tm^3 +-codoped chalcohalide glasses

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• 作者：Shaoxuan Gu ; Daoxian Pi ; Haizheng Tao ; Qi Zeng ; Xiujian Zhao ; Haitao Guo ; Hongyan Chen
• 关键词：Chalcohalide glasses ; Infrared emission properties ; Rare earth ions
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 January, 2014
• 年：2014
• 卷：383
• 期：Complete
• 页码：205-208
• 全文大小：537 K

文摘

Series of 76GeS₂路19Ga₂S₃路5AgCl (GGA) chalcohalide glasses doped with or codoped with Dy^3 +, Tm^3 + were prepared in this work. Systematical detection of absorption and emission spectra in the near-infrared and mid-infrared region was conducted. For the Dy^3 + sole-doped GGA chalcohalide glasses, mainly due to the relatively low efficiency of pumping absorption and poor radiative transition probabilities of mid-infrared emissions, the mid-infrared emissions were hardly to be detected. Through the codoping of Tm^3 + with high concentration, several intrinsical processes including the enhancement of pumping absorptive efficiency at 808 nm, cross relaxation process of Tm^3 +: ³H₄ + ³H₆ 鈫?#xA0;³F₄ + ³F₄ and energy transfer process of Tm^3 +: ³F₄ 鈫?#xA0;Dy^3 +: ⁶H_11/2 are carried out, therefore relatively strong mid-infrared emissions at about 2900 and 4300 nm have been clearly observed.