Enhanced broadband near-infrared emission and energy transfer in Bi-Tm-codoped germanate glasses for broadband optical amplification

Bi-Tm-codoped, and Tm- and Bi- singly doped germanate glasses were prepared, and their luminescent properties were investigated. Intense broadband near-IR emission with FWHM of 300 nm was observed in the Bi-Tm codoped glass. The emission intensity of Tm(3+):(3)H(4)-(13)F(4) and (3)F(4)-(13)H(5) tran...

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Published inOptics letters Vol. 34; no. 16; p. 2486
Main Authors Ruan, Jian, Dong, Guoping, Liu, Xiaofeng, Zhang, Qiang, Chen, Danping, Qiu, Jianrong
Format Journal Article
LanguageEnglish
Published United States 15.08.2009
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Summary:Bi-Tm-codoped, and Tm- and Bi- singly doped germanate glasses were prepared, and their luminescent properties were investigated. Intense broadband near-IR emission with FWHM of 300 nm was observed in the Bi-Tm codoped glass. The emission intensity of Tm(3+):(3)H(4)-(13)F(4) and (3)F(4)-(13)H(5) transitions in the Bi-Tm-codoped glass was highly increased and reduced, respectively. The fluorescence lifetime of Tm(3+) at 1470 nm increased from 204 micros to 301 micros after codoping. These should be due to the efficient energy transfer from Bi-related centers to Tm(3+) ions. The highest energy transfer efficiency is estimated to be approximately 50%.
ISSN:1539-4794
DOI:10.1364/OL.34.002486