| Texto completo | |
| Autor(es): |
Librantz, A. F. H.
;
Gomes, L.
;
Pairier, G.
;
Ribeiro, S. J. L.
;
Messaddeq, Y.
;
Sennaroglu, A
;
Fujimoto, JG
;
Terry, JAC
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MEDICAL IMAGING 2007: PACS AND IMAGING INFORMATICS; v. 6190, p. 9-pg., 2006-01-01. |
| Resumo | |
The population inversion of the Tm3+ in GLKZ glass involved in the 1470 nm emission (H-3(4) -> F-3(4)) as a function of Tb (or Eu) concentration was calculated by computational simulation for a CW laser pumping at 792 mn. These calculations were performed using the experimental Tm -> Tb an Tm -> Eu transfer rates and the spectroscopic parameters of the Tm (0.1 mol %) system. The result shows that 0.2 mol % (Tb3+) and 0.4 mol % of Eu3+ ions propitiate best population inversion of Tm3+ (0.1 mol %) maximizing the amplification coefficient of germanate (GLKZ) glass when operating as laser intensity amplification at 1470 mn. Besides the effective deactivation of the F-3(4) level, the presence of Tb3+ or Eu3+ ions introduce a depopulation of the H-3(4) emitting level by means of a cross relaxation process with Tm3+ ions. In spite of this, the whole effect is verified to be benefic for using Tm-doped GLKZ glass codoped with Tb-3+ or Eu3+ as a suitable material for confectioning optical amplifiers that operates in the S-band for telecommunication. (AU) | |
| Processo FAPESP: | 00/10986-0 - Estudo de geração de radiação ultravioleta pela excitação multifotônica de íons de Nd(3+) e Er(3+) em cristais fluoretos |
| Beneficiário: | Laercio Gomes |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |