摘要
For enhancing the 2.0 μm band fluorescence of Ho^(3+), a certain amount of WO_3 oxide was introduced into Ho^(3+)/Tm^(3+)/Yb^(3+) tri-doped tellurite glass prepared using melt-quenching technique. The prepared tri-doped tellurite glass was characterized by the absorption spectra, fluorescence emission and Raman scattering spectra, together with the stimulated absorption, emission cross-sections and gain coefficient. The research results show that the introduction of WO_3 oxide can further improve the 2.0 μm band fluorescence emission through the enhanced phonon-assisted energy transfers between Ho^(3+)/Tm^(3+)/Yb^(3+) ions under the excitation of 980 nm laser diode(LD). Meanwhile, the maximum gain coefficient of Ho^(3+) at 2.0 μm band reaches about 2.36 cm^(-1). An intense 2.0 μm fluorescence emission can be realized.
基金
supported by the National Natural Science Foundation of China(No.61178063)
the Graduate Innovative Scientific Research Project of Zhejiang Province(No.YK2010048)
the Natural Science Foundation of Ningbo City(No.2016A610061)
the K.C.Wong Magna Fund
Hu Lan Outstanding Doctoral Fund in Ningbo University
