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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Ωt(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Δλeff和峰值发射截面σpeake.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.
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关键词:
- 重金属氧化物玻璃 /
- 光谱性质 /
- Tm3+/Ho3+离子 /
- 能量传递
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 Ωt(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.-
Keywords:
- heavy metal glass /
- spectroscopic properties /
- Tm3+/Ho3+ ion /
- energy transfer
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中国物理学会期刊
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