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| Spectroscopic Properties of Tm3+/Er3+/Ho3+ Co-doped SiO2-Bi2O3-AlF3-BaF2 Glasses |
| Author Name | Affiliation | E-mail | | LI Yu-Xiang | School of Material Science and Technology, East China University of Science and Technology, Shanghai 200237, China | | | DENG Sheng-Yu | School of Material Science and Technology, East China University of Science and Technology, Shanghai 200237, China | | | FAN Ya-Lei | School of Material Science and Technology, East China University of Science and Technology, Shanghai 200237, China | | | WANG De-Qiang | School of Material Science and Technology, East China University of Science and Technology, Shanghai 200237, China | derek_wang@ecust.edu.cn |
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| Abstract: The Tm3+, Er3+ and Ho3+ co-doped bismuth silicate glasses 50SiO2-40Bi2O3-5AlF3-5BaF2 were prepared by high-temperature melt-quenching method. The spectroscopic properties of Tm3+, Er3+ and Ho3+ co-doped bismuth silicate at 2 060 nm exited by 808 nm Laser Diode were investigated. Thermal stability of the glasses, absorption spectra and fluorescence spectra of the Tm3+, Er3+ and Ho3+ co-doped glass samples were measured. According to the absorption spectrum and Judd-Oflet theory, the Judd-Oflet intensity parameters of Ho3+ Ωt(t=2, 4, 6), absorption cross sections of Tm3+, Er3+ and Ho3+ were calculated, respectively. The measured fluorescence spectra manifest that the maximal emission intensity of Ho3+:5I7→5I8 at 2 060 nm can be achieved at the concentration of 0.75% Tm2O3, 1.0% Er2O3 and 0.5% Ho2O3 in bismuth silicate glasses. Besides the spectroscopic properties of Tm3+, Er3+ and Ho3+ separately and possible energy transfer mechanisms among Tm3+, Er3+ and Ho3+ were analyzed and discussed in detail. The maximal absorption and emission cross sections of Ho3+ are 9.08×10-21 cm2 at 1 953 nm and 1.168×10-20 cm2 at 2 060 nm, respectively, with a lifetime of 2.75 ms, while large σemτ achieved (3.212×10-20 cm2·ms) suggesting its efficient application in 2 μm fiber lasers. |
| Keywords: optics 2.0 μm emission Tm3+/Er3+/Ho3+co-doped bismuth silicate glass |
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| LI Yu-Xiang,DENG Sheng-Yu,FAN Ya-Lei,WANG De-Qiang.Spectroscopic Properties of Tm3+/Er3+/Ho3+ Co-doped SiO2-Bi2O3-AlF3-BaF2 Glasses[J].Chinese Journal of Inorganic Chemistry,2017,33(5):801-808. |
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