Title of article
1.5 μm Emission and infrared-to-visible frequency upconversion in Er+3/Yb+3-doped phosphoniobate glasses
Author/Authors
Barbosa، نويسنده , , A.J. and Dias Filho، نويسنده , , F.A. and Messaddeq، نويسنده , , Y. and Ribeiro، نويسنده , , S.J.L. and Gonçalves، نويسنده , , R.R. and Lüthi، نويسنده , , S.R. and Gomes، نويسنده , , A.S.L.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
6
From page
3636
To page
3641
Abstract
Sodium phosphoniobate glasses with the composition (mol%) 75NaPO3–25Nb2O5 and containing 2 mol% Yb3+ and x mol% Er3+ (0.01 ⩽ x ⩽ 2) were prepared using the conventional melting/casting process. Er3+ emission at 1.5 μm and infrared-to-visible upconversion emission, upon excitation at 976 nm, are evaluated as a function of the Er3+ concentration. For the lowest Er3+ content, 1.5 μm emission quantum efficiency was 90%. Increasing the Er3+ concentration up to 2 mol%, the emission quantum efficiency was observed to decrease to 37% due to concentration quenching. The green and red upconversion emission intensity ratio was studied as a function of Yb3+ co-doping and the Er3+–Er3+ energy transfer processes.
Keywords
Glasses , optical spectroscopy , Luminescence , Upconversion , phosphates , Rare-earths in glasses , Laser–matter interactions , ABSORPTION
Journal title
Journal of Non-Crystalline Solids
Serial Year
2006
Journal title
Journal of Non-Crystalline Solids
Record number
1379939
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