Er3+单掺和Er3+/Yb3+共掺碲酸盐玻璃的光谱性质及能量传递

采用高温熔融法制备了新型Er3+单掺和Er3 +/Yb3+共掺的TeO2-Bi2O3-SiO2-B2O3玻璃,测试并分析了样品的吸收光谱、发射光谱以及Er3 +/Yb3共掺杂样品的发射光谱和荧光寿命.计算出了玻璃的J-O强度系数Ωt(t=2,4,6)；系统讨论了Er3+/Yb3+共掺杂样品在808 nm激光激发下,Yb...

Spectroscopic Properties and Energy Transfer of Er3+ -doped and Er3+/Yb3+ Co-doped Tellurite Glasses

Erbium-doped fiber amplifier (EDFA), utilizing the emission transition ⁴I_13/2→⁴I_15/2 of Er³⁺, is a key element of the 1.5 μm window telecommunication system. In recent years, in order to raise amplifier gain parameters, many solutions, such as Er³⁺/Yb³⁺, Er³⁺/Eu³⁺, Er³⁺/Sm³⁺-doped, were introduced. In this paper, novel Er³⁺-doped and Er³⁺/Yb³⁺co-doped TeO₂-Bi₂O₃-SiO₂-B₂O₃ glass were prepared by high-temperature melt-quenching method. The absorption spectra and emission spectra of Er³⁺- doped glass, the emission spectra and lifetimes of Er³⁺/Yb³⁺co-doped glass were measured and investigated. The intensity parameters Ω_t (t=2,4,6) were calculated by using the theory of Judd-Ofelt. Under 808 nm semiconductor laser excitation, the infrared emission intensity ratio of Yb³⁺ ions to Er³⁺ ions and mechanism of counter energy transfer were discussed in Er³⁺/Yb³⁺co-doped glass. The results indicate that a maximum value of full width half maximum (FWHM) of 1.53 μm infrared emission spectra is 90 nm in Er³⁺-doped glasses, and the suitable content of Yb³⁺ ions is helpful for decreasing the disappearing population velocity of Er³⁺:⁴I_13/2 level, increasing the emission intensity of Er³⁺:⁴I_13/2→⁴I_15/2 transition and lifetime of Er³⁺:⁴I_13/2 level.