机构地区: 洛阳理工学院材料科学与工程系
出 处: 《中国陶瓷》 2015年第1期24-28,共5页
摘 要: 报道了Tm3+掺杂的15Ga2O3-75Ge O2-10Na2O玻璃1.47-μm发光,应用Judd-Ofelt理论计算了玻璃的强度参数t(t=2,4,6)、自发辐射几率A、荧光分之比β等各项光谱参数以及峰值发射截面σepeak。通过测量光谱性能研究了敏化剂离子(Ho3+,Tb3+,Sm3+,Dy3+)掺杂浓度对Tm3+离子1.47-μm波段发光性能的影响,分析了Tm3+和这些敏化剂离子之间的能量传递过程。研究表明镓锗钠玻璃是适用于S波段光纤放大器的一种潜在基质材料,而掺杂一定浓度的敏化剂离子迅速降低了Tm3+:3F4能级的粒子数,而对3H4能级粒子数影响不大,极大地提高了Tm3+离子在1.47-μm波段的发光效率,且Tb3+是最有效的敏化剂离子。 This paper reports on the spectroscopic properties of Tm3+-doped 15Ga2O3-75 Ge O2-10Na2O(GGN) glasses. The Judd-Ofelt intensity parameters Ωt(t=2,4,6), spontaneous-emission probabilities and branch ratios of each level of Tm3+ have been calculated by Judd-Ofelt theory. The peak emission cross-section of the 3H4→ 3F4 transition(1.47-μm) of Tm3+ has also been obtained. Codoping of sensitizer ion(Ho3+, Tb3+,Sm3+,Dy3+) significantly decreased the population of 3F4 level of Tm3+, while the population of 3H4 level of Tm3+ reduced slightly. And a suitable sensitizer ion is obtained. Our results indicate that GGN glass is a promising candidate for 1.47-μm optical amplifiers, and Tb3+is an effective codopant to enhance the 1.47-μm luminescence.