Concentration quenching of the 1470 nm emission in Tm3+-doped lead-niobium-germanate glasses

被引：1

作者：

Balda, R ^{[1
]}

Lacha, LM ^{[1
]}

Fernández, J ^{[1
]}

Fdez-Navarro, JM ^{[1
]}

机构：

[1] Escuela Super Ingn, Dept Fis Aplicada 1, Bilbao 48013, Spain

来源：

Optical Components and Materials II | 2005年 / 5723卷

关键词：

heavy metal oxide glasses; thulium; concentration quenching; optical properties;

D O I：

10.1117/12.588546

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, we have studied the concentration quenching of the H-3(4)-> F-3(4) emission of Tm3+ doped lead-niobium-germanate glasses (GeO2-PbO-Nb2O5) for different Tm-3, concentrations (0.1, 0.2, 0.5, 1, 2, and 3 wt%). The emission spectra obtained under 798 nm excitation reveal the existence of energy transfer via cross-relaxation among Tm3+. As a result, the intensity of the infrared H-3(4)-> F-3(4) emission at 1474 rim decreases in relation to that of the 1820 nm emission as concentration increases. The non-exponential character of the decays from the H-3(4) level with increasing concentration, together with the dependence of the effective decay rates on Tm3+, concentration, indicate the presence of a dipole-dipole quenching process in the framework of a diffusion-limited regime.

引用

页码：55 / 62

页数：8