| Texto completo | |
| Autor(es): |
Gomes, Laercio
;
Rhonehouse, Daniel
;
Nguyen, Dan T.
;
Zong, Jie
;
Chavez-Pirson, Arturo
;
Jackson, Stuart D.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Optical Materials; v. 50, p. 7-pg., 2015-12-01. |
| Resumo | |
This report details the fundamental spectroscopic properties of a new class of water-free tellurite glasses studied for future applications in mid-infrared light generation. The fundamental excited state decay processes relating to the I-4(11/2) -> I-4(13/2) transition in singly Er3+-doped Tellurium Zinc Lanthanum glass have been investigated using time-resolved fluorescence spectroscopy. The excited state dynamics was analyzed for Er2O3 concentrations between 0.5 mol% and 4 mol%. Selective laser excitation of the I-4(11/2) energy level at 972 nm and selective laser excitation of the I-4(13/2) energy level at 1485 nm has established that in a similar way to other Er3+-doped glasses, a strong energy-transfer upconversion by way of a dipole-dipole interaction between two excited erbium ions in the I-4(13/2) level populates the I-4(11/2) upper laser level of the 3 mu m transition. The I-4(13/2) and I-4(11/2) energy levels emitted luminescence with peaks located at 1532 nm and 2734 nm respectively with luminescence efficiencies of 100% and 8% for the higher (4 mol.%) concentration sample. Results from numerical simulations showed that a population inversion is reached at a threshold pumping intensity of similar to 57 kW cm(-2) for a CW laser pump at 976 nm for [Er2O3] = 2 mol.%. (C) 2015 Elsevier B.V. All rights reserved. (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 |