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Energy transfer and enhanced broadband near-infrared luminescence in Yb–Bi codoped phosphate glasses

Published online by Cambridge University Press:  31 January 2011

Jian Ruan
Affiliation:
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China; and Graduate School of the Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Botao Wu
Affiliation:
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, People's Republic of China
Danping Chen
Affiliation:
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
Yanbo Qiao
Affiliation:
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China; and Graduate School of the Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Jianrong Qiu*
Affiliation:
State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China
*
a) Address all correspondence to this author. e-mail: qjr@zju.edu.cn
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Abstract

In this article, we report on enhanced broadband near-infrared emission in Yb–Bi codoped phosphate glasses. The emission intensity of Yb–Bi codoped glass was ˜32 times larger than that of Bi-doped glass when excited with 980-nm laser diode. The highest 1/e fluorescent lifetime of Yb–Bi codoped glass reached 1650 μs. The dependence of emission intensity and fluorescent lifetime on Yb2O3 concentration was investigated. The enhancement of the near-infrared emission is due to energy transfer from Yb3+ (2F5/22F7/2) transition to Bi ions, and the highest energy transfer efficiency reached 50%. Yb–Bi codoped phosphate glass should be a promising candidate for broadband optical amplification.

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Articles
Copyright
Copyright © Materials Research Society 2009

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