【摘 要】
：
Bi-doped glasses have gained considerable attention due to its broadband and tunable near-infrared (NIR) emission in the range of 1000-1700 nm, which make it a promising material for application in br
【机 构】
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State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering,Zhejia
【出 处】
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第七届中国功能玻璃学术研讨会暨新型光电子材料国际论坛
论文部分内容阅读
Bi-doped glasses have gained considerable attention due to its broadband and tunable near-infrared (NIR) emission in the range of 1000-1700 nm, which make it a promising material for application in broadband optical amplification, e.g.fiber amplifier in fiber communication.However, the amplification gain and laser performance in Bi-doped glass fiber still leaves much to be desired.It is identified that Bi is present in various forms, including Bi3+, Bi2+, Bi+, Bi atom, Bi cluster and Bi nanocrystal, in the glasses, and that the activation energy of the chemical transformations of these species is relatively low.So the thermal activation during fiber drawing process is anticipated to be sufficient enough to trigger the transformation of Bi species.From this point of view, we proposed a way of improving the NIR luminescence thermal stability of Bi-doped borate glasses by regulating the structure rigidity of glass.As an example, the NIR luminescence thermal stability is significantly improved with the addition of 5 mol% La2O3, which is believed to enhance the structure rigidity.The results not only provide valuable guidance for suppressing performance degradation of Bi-doped glass during fiber drawing process, but also present an effective way to control the luminescence properties of main group elements in glasses from the perspective of glass structure.
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