Emission properties of PbO−Bi2O3−Ga2O3−GeO2 glasses doped with Tm3+ and Ho3+
Emission properties of PbO−Bi2O3−Ga2O3−GeO2 glasses doped with Tm3+ and Ho3+
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DOI：
10.1063/1.1571968
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发表时间：
2003-05
影响因子：
3.2
通讯作者：
J. Song;J. Heo;S. H. Park
中科院分区：
文献类型：
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作者：
J. Song;J. Heo;S. H. Park
由于GeO_2的声子能量较低，研究了含GeO_2的重金属氧化物玻璃作为1.48 μ m光纤放大器基质的可能性。在0.57PbO − 0.25Bi2O3 − 0.18Ga2O3（摩尔分数）玻璃中添加10mol%的GeO2可提供热稳定性以及良好的发射性能。考虑到Tm3+：3H4能级的寿命和布居数，1.48 μ m放大器的最佳玻璃组成为0.8（0.57PbO − 0.25Bi2O3 − 0.18Ga2O3）− 0.2GeO2（摩尔分数）。当Ho~（3+）的掺杂浓度超过0.2mol%时，Tm~（3+）：3H~4能级的布居密度急剧下降，实现了Tm~（3+）中3H~4和3F~4能级的布居反转。
Heavy metal oxide glasses containing GeO2 were investigated as potential hosts for 1.48 μm fiber-optic amplifiers because of their low phonon energy. Addition of ⩾10 mol % GeO2 to 0.57PbO−0.25Bi2O3−0.18Ga2O3 (mole fraction) glass provided thermal stability as well as good emission properties. The optimum glass composition for 1.48 μm amplifiers, considering lifetimes and population of the Tm3+:3H4 level, was 0.8 (0.57PbO−0.25Bi2O3−0.18Ga2O3)−0.2GeO2 (mole fraction). As the concentration of codoped Ho3+ exceeded 0.2 mol %, the population density of the Tm3+:3H4 level decreased sharply and the population inversion between the 3H4 and 3F4 levels in Tm3+ was achieved.