Upconversion luminescence of Er3+/Yb3+-doped halide tellurite glass is investigated experimentally upon 976-nm excitation. Three intense emissions centered at 525, 545 and 655 nm owing to the transitions 2H11/2-4I15/2...Upconversion luminescence of Er3+/Yb3+-doped halide tellurite glass is investigated experimentally upon 976-nm excitation. Three intense emissions centered at 525, 545 and 655 nm owing to the transitions 2H11/2-4I15/2, 4S3/2 -4I15/2 and 4F9/2-4I15/2, respectively, are observed when pumping power is as low as 20 mW. The upconversion mechanisms and power dependent intensities are discussed. The high-populated 4I11/2 level is supposed to serve as the intermediate state responsible for the upconversion processes.展开更多
基金This work was supported by Shanghai Science and Technology Foundation(022261046) and the National Natural Science FOundation(60207006)
文摘Upconversion luminescence of Er3+/Yb3+-doped halide tellurite glass is investigated experimentally upon 976-nm excitation. Three intense emissions centered at 525, 545 and 655 nm owing to the transitions 2H11/2-4I15/2, 4S3/2 -4I15/2 and 4F9/2-4I15/2, respectively, are observed when pumping power is as low as 20 mW. The upconversion mechanisms and power dependent intensities are discussed. The high-populated 4I11/2 level is supposed to serve as the intermediate state responsible for the upconversion processes.
