【摘 要】
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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 fo
【机 构】
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Institute of Optical Communication Materials, South of China University of Technology, Guangzhou 510
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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 ～1530nm 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× 10-21 cm2, 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.
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