期刊
JOURNAL OF LUMINESCENCE
卷 163, 期 -, 页码 55-63出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2015.02.036
关键词
Glasses; Erbium; JO parameters; Up-conversion; Radiative properties; Emission cross-section
类别
资金
- Department of Science and Technology (DST), Government of India, New Delhi under DST/WOS-A scheme [SR/WOS-A/PS-35/2011, SR/WOS-A/PS-53/2011]
- High-impact Research initiative of IIT-Delhi
- UK-India Education Research Initiative (UKIERI)
- DST, Government of India, New Delhi
Er3+ doped Zinc Alumino Bismuth Borate (ZnAlBiB) glasses with composition 20ZnO+10Al(2)O(3)+(10-x)Bi2O3 +60B(2)O(3)+xEr(2)O(3) (where x=0.1, 0.5,1.0 and 2.0 mol%) were prepared by using a melt quenching technique to study their luminescence efficiency in different regions of electromagnetic spectrum using absorption, emission, up-conversion and time resolved photoluminescence spectral studies at room temperature. The Judd-Ofelt (JO) parameters evaluated by applying JO theory to the absorption spectra of Er3+ doped ZnAlBiB glasses were used to calculate the radiative properties such as transition probability (A(R)), Branching ratios (beta(R)), radiative lifetimes (tau(R)), stimulated emission cross-section (sigma(se)), gain band width (sigma(se) x Delta lambda p) and optical gain (sigma(se) X tau(R)) parameters for the prominent luminescent levels of Er3+. Visible and near infra-red (NIR) emission spectra have been recorded by exciting the glass samples at 486 nm and 980 nm respectively. Quantum efficiency (eta) values for the prepared glasses were evaluated from the decay curves recorded for the NIR transition I-4(13/2)-> I-4(15/2). The up-conversion luminescence shown by these glasses were recorded and analysed to understand utility of these glasses as up-conversion lasers by exciting them with 980 nm laser diode. The visible, up-conversion and NIR luminescence studies indicate that Er3+ ions doped ZnAlBiB glasses are aptly suitable for solid state lasers and optical amplifiers. (C) 2015 Elsevier B.V. All rights reserved.
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