Sensitizing effect of Ho3+ on the Er3+: 2.7μm-emission in fluoride glass

•The fluorescence properties of 2.7μm emission and energy transfer mechanism are investigated.•The optimized concentration ratio of Er3+ to Ho3+ is found to be 1:1.•The sample possesses large emission cross section and radiative transition probability.•The energy transfer microparameters are calcula...

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Bibliographic Details
Published in:Optical materials 2014-03, Vol.36 (5), p.921-925
Main Authors: Huang, Feifei, Li, Xia, Liu, Xueqiang, Zhang, Junjie, Hu, Lili, Chen, Danping
Format: Article
Language:English
Subjects:
Cross sections
Emission
Emission analysis
Emission cross section
Energy transfer
Energy transfer coefficient
Energy transfer mechanism
Exact sciences and technology
Fluorescence properties
Fluorides
Fundamental areas of phenomenology (including applications)
Glass
Lasers
Mathematical analysis
Optical materials
Optics
Physics
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Summary:•The fluorescence properties of 2.7μm emission and energy transfer mechanism are investigated.•The optimized concentration ratio of Er3+ to Ho3+ is found to be 1:1.•The sample possesses large emission cross section and radiative transition probability.•The energy transfer microparameters are calculated and discussed. The fluorescence properties of 2.7μm emission and energy transfer mechanism of Ho3+/Er3+ co-doped fluoride glass (ZBYA) have been investigated in the present paper. Ho3+ strengthens the Er3+: 2.7μm emission in the ZBYA glasses due to the energy transfer from Er3+ to Ho3+, while the 1.5μm emission decreases dramatically. The optimized concentration ratio of Er3+ to Ho3+ is found to be 1:1 in our glass system. The absorption and emission spectra are tested and the sample possesses large emission cross section (16.5×10−21cm2) around 2.7μm along with larger radiative transition probability (25.11S−1) on the basis of Judd–Ofelt and Fuchtbauer–Ladenburg theories. Additionally, the energy transfer microparameters are calculated using Förster–Dexter theory and the result shows the energy transfer coefficient of Er3+:4I13/2→Ho3+:5I7 is 24 times larger than that of Er3+:4I11/2→Ho3+:5I6. Our results show that Er3+: 2.7μm emission can be sensitized by Ho3+ efficiently, and this Er3+/Ho3+-codoped fluoride glasses might have potential application in mid-infrared lasers.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2013.12.031