Highly efficient ～3.4 μm emission of Er3+-doped TeO2 based glasses via resonant energy transfer and multi-phonon relaxation processes

作者：Huang, Jianhui; Zhang, Liaolin^*; Xia, Libing; Shen, Xiao; Wei, Wei; You, Weixiong

来源：Optical Materials, 2020, 108: 110387.

DOI：10.1016/j.optmat.2020.110387

• TeO2 based glass
• Er3+
• 3.4 mu m emission

To clarify the relation between the concentration and similar to 3.4 mu m emission of Er3+, a series of TeO2 based glasses with Er3+ concentration from 2.0 to 10.0 mol% were prepared by conventional melting-quenching method. The physical and spectroscopic characteristics of Er3+-doped tellurite glasses were systematically investigated. The Judd-Ofelt theory was used to analyze the absorption spectra. The emission intensity of similar to 2.7 mu m and upconversion at 550 and 670 nm were discussed. The intensity increased when the Er3+ concentration increased to 6 mol%, and then drastically decreased with further increasing Er3+ concentration. The trend of the emission properties in NIR with the Er3+ concentration was also discussed. With increasing Er3+ concentration, the emission cross section at similar to 3.4 mu m increased from 1.37 x 10(-21) cm(2) to 2.53 x 10(-21) cm(2). The results indicate that the highly doped Er3+ concentration may be an effective route to achieve efficient similar to 3.4 mu m emission in Er3+ doped tellurite glasses.

• 单位
  南京邮电大学; 江西理工大学