Infrared-to-Visible Upconversion Emissions in Er3+ Doped TeO2-Based Oxyhalide Glasses
The fluorescence and up-conversion spectral properties of Er3+-doped TeO2-ZnO and TeO2-ZnO-PbCl2 glasses suitable for developing optical fiber amplifier and laser have been fabricate and characterized. Strong green (around 527-550 nm) and red (around 661 nm) up-conversion emissions under 977 nm laser diode excitation were investigated, corresponding to 2H11/2, 4S3/2, ® 4I15/2 and 4F9/2 ® 4I15/2 transitions of Er3+ ions respectively, have beenobserved and the involved mechanisms have been explained. The dependence of up-converted fluorescence intensity versus laser power confirm that two-photons contribute to up-conversion of the green-red emissions. The novelty of this kind of optical material has been its ability in resisting devitrification, and its promising optical properties strongly encourage for their further development as the rare-earth doped optical fiber amplifiers and upconversion fiber laser systems.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Y. H. Liu et al., "Infrared-to-Visible Upconversion Emissions in Er3+ Doped TeO2-Based Oxyhalide Glasses", Key Engineering Materials, Vols. 280-283, pp. 953-956, 2005