Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948485 | Ceramics International | 2018 | 21 Pages |
Abstract
The up-conversion emission of Nd3+, Sm3+ and Er3+ has been studied in a new halogeno-antimonite glass with the chemical composition 80 Sb2O3 - 10 ZnBr2 - 10 KCl. Doping concentration was 0.2â¯mol% of lanthanide (Ln) ions. Rare earths were introduced as fluorides LnF3 that were further converted into oxides. Main physical properties of base glass were measured, including density, thermal expansion, characteristic temperatures, refractive index and optical transmission. The amount of residual hydroxyls was calculated from the OH absorption band around 3000â¯nm. The recorded up-conversion emission lines are λem =â¯536â¯nm for Nd3+ pumped at 805â¯nm; λem =â¯563â¯nm, 600â¯nm, 631â¯nm and 645â¯nm for Sm3+ pumped at 945â¯nm; λem =â¯531â¯nm for Er3+ pumped at 798â¯nm. Co-doped glass (0.1 Yb3+ + 0.1 Er3+) pumped at 980â¯nm has three emission lines at 524â¯nm, 545â¯nm and 650â¯nm. Corresponding transitions have been identified and the mechanisms ruling the up-conversion process is discussed. They include excited state absorption (ESA), energy transfer (ET) cooperative energy transfer (CET), emission assisted by phonon (EAP), multiphonon relaxation (MR) and cross- relaxation (CR).
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
M. Iezid, F. Goumeidane, A. Abidi, N. Gherraf, M. Legouera, M. Poulain, T. Satyanarayana, P. Syam Prasad, P. Venkateswara Rao,