Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

Shiliang Kang; Xiudi Xiao; Qiwen Pan; Dongdan Chen; Jianrong Qiu; Guoping Dong

doi:10.1038/srep43186

Spectroscopic properties in Er³⁺-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

Sci Rep. 2017 Mar 7:7:43186. doi: 10.1038/srep43186.

Authors

Shiliang Kang¹, Xiudi Xiao², Qiwen Pan¹, Dongdan Chen¹, Jianrong Qiu³, Guoping Dong¹

Affiliations

¹ State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
² Key Laboratory of Renewable Energy, Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
³ College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.

Abstract

Transparent Er³⁺-doped germanotellurite glass ceramics (GCs) with variable Te/Ge ratio were prepared by controllable heat-treated process. X-ray diffraction (XRD) and transmission electron microscope (TEM) confirmed the formation of nanocrystals in glass matrix. Raman spectra were used to investigate the evolution of glass structure and photon energy. Fourier transform infrared (FTIR) spectra were introduced to characterize the change of hydroxyl group (OH^-) content. Enhanced 2.7 μm emission was achieved from Er³⁺-doped GCs upon excitation with a 980 nm laser diode (LD), and the influence of GeO₂ concentration and heat-treated temperature on the spectroscopic properties were also discussed in detail. It is found that the present Er³⁺-doped GC possesses large stimulated emission cross section at around 2.7 μm (0.85 × 10^-20 cm²). The advantageous spectroscopic characteristics suggest that the obtained GC may be a promising material for mid-infrared fiber lasers.

Publication types

Research Support, Non-U.S. Gov't