Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7907767 | Optical Materials | 2018 | 6 Pages |
Abstract
The Dy3+/Yb3+ co-doped germanate glasses with good thermal stability have been prepared by the conventional melt quenching method. The J-O intensity parameters and radiative properties such as spontaneous transition probilities (Arad), fluorescence branching ratios (β) and radiative lifetimes (Ïrad) were investigated according to the absorption spectrum based on Judd-Ofelt theory. An intense emission around â¼3 μm with the FWHM reaching to 322 nm was obtained in present glasses excited by 980 nm LD. The high spontaneous transition probability (63.94 sâ1), large emission cross section (6.0 Ã 10â21 cm2) and superior gain performance corresponding to the Dy3+: 6H13/2 â 6H15/2 transition were obtained. Moreover, the energy transfer mechanism was analyzed qualitatively, and it was found that the energy transfer from Yb3+: 2F5/2 to Dy3+: 6H5/2 level could be quite efficient. Hence, the results indicated that the prepared Dy3+/Yb3+ co-doped germanate glass could be a potential candidate for â¼3 μm mid-infrared solid state lasers.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Lingling Shen, Ning Wang, Aoju Dou, Yangjian Cai, Ying Tian, Feifei Huang, Shiqing Xu, Junjie Zhang,