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Manipulating Bi NIR emission by adjusting optical basicity, boron and aluminum coordination in borate laser glasses
Journal of the American Ceramic Society ( IF 3.9 ) Pub Date : 2017-09-26 , DOI: 10.1111/jace.15234
Yafei Xue 1 , Jiangkun Cao 1 , Ziyang Zhang 1 , Liping Wang 1 , Shanhui Xu 1 , Mingying Peng 1
Affiliation  

Bismuth‐doped (Bi) glasses and fibers have raised considerable attention for broadband emission and tunable fiber lasers in the near infrared (NIR) region. However, they suffer from low efficiency and it remains challenging to enhance Bi NIR emission. Here, we propose a facile way to enhance and tune the Bi NIR emission by adjusting optical basicity and modulating the boron and aluminum coordination in borate glasses. We find that BO4 and AlO5 species favor Bi NIR emission, right followed by the analyses of static emission spectra, the Fourier transform infrared (FT‐IR), and nuclear magnetic resonance (NMR) spectroscopy. Furthermore, abnormal Bi NIR luminescence phenomenon and boron anomaly were observed, which are attributed to the synthetic effect of B and Al coordination transformation. Besides, we find that BO4 tetrahedron plays a major role in enhancing Bi NIR emission at low Al content, while AlO5 hexahedron group will dominate at high Al concentration. Our investigation may give an insight into the luminescent behaviors of Bi in borate glasses and contribute to improving the performance of Bi‐doped fiber and fiber lasers in future.

中文翻译:

通过调整硼酸盐激光玻璃的光学碱度,硼和铝配位来控制Bi近红外发射

掺铋(Bi)玻璃和光纤在宽带发射和近红外(NIR)区域中的可调光纤激光器方面引起了相当大的关注。但是,它们的效率低下,并且仍然难以提高Bi NIR发射。在这里,我们提出了一种简便的方法,可以通过调节光学碱度和调制硼酸盐玻璃中的硼和铝配位来增强和调节Bi NIR发射。我们发现BO 4和AlO 5物种偏爱Bi NIR发射,然后进行静态发射光谱,傅立叶变换红外(FT-IR)和核磁共振(NMR)光谱分析。此外,观察到异常的Bi NIR发光现象和硼异常,这归因于B和Al配位转变的合成作用。此外,我们发现BO 4四面体在低Al含量下增强Bi NIR发射起主要作用,而AlO 5六面体基团在高Al浓度下起主导作用。我们的研究可能会深入了解Bi在硼酸盐玻璃中的发光行为,并有助于将来改善掺Bi的光纤和光纤激光器的性能。
更新日期:2017-09-26
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