High-Efficiency 3.5 Μm Luminescence of Er3+ Based on High-Concentration Doping in Multicomponent Glasses

Abstract

The ~3.5 µm mid-infrared laser based on a high concentration of Er 3+ -doped multicomponent glasses possesses unique advantages, but the existing traditional glass hosts, that are inherently flawed, lead to challenging research. In this paper, oxyhalide glass with tellurite (as the main body) and chloride (as the modifier) were obtained with a high doping concentration of Er 3+ . It is worth noting that the microstructure can be adjusted to obtain excellent luminescence properties, while ensuring the thermal properties of the matrix. Both the actual performance test and theoretical calculation show that the scheme of realizing ~3.5 µm luminescence by high Er 3+ doping in the present oxyhalide glass matrix is reasonable and effective, which provides a new choice for Er 3+ -doped ~3.5 µm laser gain medium in the future.

Keywords: Oxyhalide glass, ~3.5 µm emission, High concentration doping, Er3+-doped