基于高磁光效应Ce/Tb共掺光纤材料的光谱特性研究

Research on spectral properties of Ce/Tb co-doped fiber materials based on high magneto-optic effect

针对掺杂石英光纤的磁光效应比较弱的特点,采用溶胶-凝胶(sol-gel)方法分别制备Ce、Tb掺杂和Ce/Tb共掺光纤材料。在紫外光激发下,测试Ce、Tb单掺样品和Ce/Tb共掺样品的激发-发射光谱。然后,通过对比研究Tb掺杂材料和Ce/Tb共掺材料在542nm处对应的激发光谱,发现Ce和Tb离子之间存在明显的能量转移现象。实验结果表明:Ce离子共掺可以明显提高Tb离子的发光效率。最后,采用粉棒法制备了共掺石英光纤,为制备具有高磁光效应的掺杂磁光光纤奠定了重要的理论基础。

For the weak magneto-optical effect of the doped silica optical fibers, in this paper, Ce-doped, Tb-doped, and Cerium/Terbium co-doped optical fiber materials are fabricated by the sol-gel method, respectively. Their emission and excitation spectra are measured under the ultra-violet excitation. Comparing the excitation spectra of Tb-doped sample to that of Ce/Tb co-doped sample with the fixed emission of 542nm, there obviously exists an energy transferring from Ce ions to Tb ions, which shows that the fluorescence efficiency of Tb is improved, due to the role of Ce ions. In the last, the Ce/Tb co-doped silica fiber is successfully fabricated by the powder-in-tube method. These lay an important theoretical foundation for the fabrication of doped magneto-optic fibers with high magneto-optic effect.