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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Optical characterization, infrared emission and visible up-conversion in Er3+ doped tellurite glasses

Texto completo
Autor(es):
Seshadri, M. [1] ; Chillcce, E. F. [1] ; Marconi, J. D. [2, 1] ; Sigoli, F. A. [3] ; Ratnakaram, Y. C. [4] ; Barbosa, L. C. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, UNICAMP, Inst Phys, BR-13083970 Campinas, SP - Brazil
[2] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, BR-09210580 Santo Andre, SP - Brazil
[3] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil
[4] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh - India
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 402, p. 141-148, OCT 15 2014.
Citações Web of Science: 16
Resumo

In this work, Er3+ doped tellurite glasses have been prepared with the composition (82.5-x) TeO2 + 4.5Bi(2)O(3) + 11.5ZnO + 1.5Nb(2)O(5) + x Er2O3 (x = 0.1, 0.3, 0.5, 0.7, 1.0 mol%) by melt-quenching method and their physical, spectroscopic properties were investigated. The experimental oscillator strengths (f(exp)) of individual absorption peaks are used to estimate the Judd-Ofelt intensity parameters (Omega(lambda), lambda = 2, 4, 6). Judd-Ofelt intensity parameters are used to calculate the spontaneous transition probabilities, radiative lifetimes and branching ratios for certain excited states of Er3+ ions. NIR emission and visible up-conversion luminescence were observed at room temperature for all glasses by exciting with 980 nm laser radiation. The emission characteristics such as peak stimulated emission cross section, FWHM, figure of merit optical gain cross sections and measured lifetimes have been obtained for the observed Er3+: I-4(13/2) --> I-4(15/2) transition in the above glass composition for all the concentrations and are compared with that of the reported. Finally, NIR to visible energy conversion has been analyzed for all glasses excited at 980 nm and suitable mechanism was proposed. (C) 2014 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 12/50480-6 - Estudo da espectroscopia de terras raras em vidros e fibras ópticas de vidros teluritos com potenciais aplicações em lasers do estado sólido e dispositivos não lineares
Beneficiário:Seshadri Meruva
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado