| Texto completo | |
| Autor(es): |
Gomes, Laercio
;
Jackson, Stuart D.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS; v. 30, n. 6, p. 10-pg., 2013-06-01. |
| Resumo | |
Excitation of the F-2(7/2) -> F-2(5/2) transition of the Yb3+ ion in Yb3+, Pr3+-doped fluorozirconate glass at 974 nm results in efficient excitation of the (1)G(4) level of Pr3+ ion that in turn emits in the middle infrared at similar to 3.6 mu m. The energy transfer (ET) process Yb3+(F-2(5/2)) -> Pr3(+)((1)G(4)) is assisted by fast excitation migration among the Yb3+ ions. An upconversion process involving ET from the F-2(5/2) level to the (1)G(4) excited state populates the P-3(0) excited state that produces emission at 481, 521, 603, 636, and 717 nm. A study of the behavior of the fluorescence from the (1)G(4) level at 1325 nm and from the P-3(0) level at 603 nm allowed the estimation of the ET rate constants for the processes involved after short-pulsed laser excitation at 974 nm. A rate-equation model was employed to evaluate the population inversion relating to the (1)G(4) -> F-3(4) transition of the Pr3+ ion at 3.6 mu m under continuous wave pumping. (C) 2013 Optical Society of America (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 |