Novel Bi-doped glasses for broadband optical amplification |
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| Authors: | Jianrong Qiu Mingying Peng Jinjun Ren Xiangeng Meng Xiongwei Jiang Congshan Zhu |
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| Institution: | 1. State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China;2. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;1. Chinese Academy of Sciences (CAS) and Shanghai Institute of Optics and Fine Mechanics, Shanghai, China;2. J.J. Thomson Physical Laboratory, University of Reading, Reading, UK;3. Shanghai Institute of Optics and Fine Mechanics, Shanghai, China |
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| Abstract: | Broadband infrared luminescence is observed in various Bi-doped oxide glasses prepared by conventional melting-quenching technique. The absorption spectrum of the Bi-doped germanium oxide glass consists of five broad peaks at below 370, 500, 700, 800 and 1000 nm. The fluorescence spectrum exhibits a broad peak at about 1300 nm with full width at half maximum (FWHM) of more than 300 nm when excited by an 808 nm laser diode. The fluorescence lifetime at room temperature decreases with increasing Bi2O3 concentration. Influence of the glass composition and melting atmosphere on the fluorescence lifetime and luminescent intensity is investigated. The mechanism of the broadband infrared luminescence is suggested. The product of stimulated emission cross-section and lifetime of the Bi-doped aluminophosphate glass is about 5.0 × 10?24 cm2 s. The glasses might be promising for applications in broadband optical fiber amplifiers and tunable lasers. |
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