Tm3+/Ho3+共掺镓铋酸盐玻璃1.47μm发光特性和能量传递的研究

报道了Tm³⁺/Ho³⁺共掺的镓铋酸盐玻璃14Ga₂O₃-25Bi₂O₃-20GeO₂-31PbO-10PbF₂玻璃1.47μm(S波段)发光和能量传递特征，应用Judd-Ofelt理论计算了玻璃的强度参数Ω_t(t=2，4，6)，自发辐射概率A、荧光分支比β，荧光辐射寿命τ等各项光谱参数以及有效荧光线宽Δλ_eff和峰值发射截面σ^peak_e.通过测量荧光光谱和荧光寿命研究了Ho³⁺离子掺杂浓度对Tm³⁺离子1.47μm波段发光性能的影响，分析了Tm³⁺和Ho³⁺之间的能量传递过程.结果表明一定浓度内Ho³⁺的共掺迅速降低了Tm³⁺：³F₄能级的粒子数，而对³H₄能级粒子数影响不大，从而降低了³F₄和³H₄能级间布居数反转的难度，极大地提高了1.47μm发光效率.研究表明镓铋酸盐玻璃是适用于S波段光纤放大器的一种潜在基质材料，而掺杂一定浓度的Ho³⁺离子有利于提高Tm³⁺离子在1.47μm波段的发光效率. 关键词： 重金属氧化物玻璃 光谱性质 3+/Ho³⁺离子')" href="#">Tm³⁺/Ho³⁺离子 能量传递

Spectroscopic properties and energy transfer of Tm3+/Ho3+-codoped Ga2O3-Bi2O3-GeO2-PbO-PbF2 glasses for 1.47μm luminecence

This paper reports on the spectroscopic properties and energy transfer of Tm³⁺/Ho³⁺-codoped 14Ga₂O₃-25Bi₂O₃-20GeO₂-31PbO-10PbF₂ glasses. The Judd-Ofelt intensity parameters Ω_t(t=2，4，6), spontaneous-emission probability, branch ratio and radiative lifetime of each level of Tm³⁺ have been calculated by Judd-Ofelt theory. The effective bandwidth and peak emission cross-section of the ³H₄→³F₄ transition (1.47μm) of Tm³⁺ have also been obtained. Codoping of Ho³⁺ significantly decreased the population of ³F₄ level of Tm³⁺, while the population of ³H₄ level of Tm³⁺ reduced slightly. Our results indicate that GGBPF glass is a promising candidate for 1.47μm optical amplifiers, and Ho³⁺ is an effective codopant to enhance the 1.47μm luminescence.