College of Science,South China Agriculture University,Guangzhou 510640,China;
Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology,Ministry of Education,Institute of Optical Communication Materials,South China University of Technology,Guangzhou 510640,China;
Key Laboratory of Specially Functional Materials and Advanced Manufacturing Technology,Ministry of Education,Institute of Optical Communication Materials,South China University of Technology,Guangzhou 510640,China;
upconversion, luminescence, Er3, bismuth-lead-germanate glasses;