Infrared-to-Visible Upconversion and 1.53-μm Emission of Er3+-Doped Al(PO3)3-Based Fluorophosphate Glass
LI Tao1, ZHANG Qin-Yuan1, LIU Yue-Hui1, ZHANG Jun-Jie2, DENG Zai-De1, JIANG Zhong-Hong1,2
1Institute of Optical Communication Materials, South of China University of Technology, Guangzhou 510640
2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Infrared-to-Visible Upconversion and 1.53-μm Emission of Er3+-Doped Al(PO3)3-Based Fluorophosphate Glass
LI Tao1;ZHANG Qin-Yuan1;LIU Yue-Hui1;ZHANG Jun-Jie2;DENG Zai-De1;JIANG Zhong-Hong1,2
1Institute of Optical Communication Materials, South of China University of Technology, Guangzhou 510640
2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Abstract： We investigate the spectroscopic properties of the 1.53-μm emission from the 4I13/2 → 4I15/2 transition of Er3+ ions in Al(PO3)3-based fluorophosphate glass for applications in broadband fibre amplifiers. The emission peak locates at ～1530 nm with a full width at half-maximum of ～65 nm. The measured lifetime and the calculated emission cross-section of this transition are ～8.1 ms and ～7.6 x 10-21cm2, respectively. Frequency upconversion to the 4F7/2 state occurs simultaneously upon excitation of the 1.53-μm emission with a 977-nm laser diode. Three infrared-to-visible upconversion emissions centred at around 524, 546 and 668 nm have been clearly observed. The quadratic dependence of fluorescence on excitation laser power confirms the fact that a two-photon process will contribute to the infrared-to-visible upconversion emissions.
2004, Vol. 21 
