Study of optical absorption, visible emission and NIR-vis luminescence spectra of Tm3+/Yb3+, Ho3+/Yb3+ and Tm3+/Ho3+/Yb3+ doped tellurite glasses

Autor(es)

Seshadri, M. ^[1] ; Barbosa, L. C. ^[1] ; Cordeiro, C. M. B. ^[1] ; Radha, M. ^[1] ; Sigoli, F. A. ^[2] ; Ratnakaram, Y. C. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Phys, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Inst Chem, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[3] Sri Venkateswara Univ, Dept Phys, Tirupat 517502, Andhra Pradesh - India

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 166, p. 8-16, OCT 2015.
• Citações Web of Science: 14

Resumo

Tm3+/Yb3+, Ho3+/Yb3+ co-doped and Tm3+/Ho3+/Yb3+ triply doped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were prepared by melt quenching method. Judd-Ofelt intensity parameters (Omega(lambda), lambda=2, 4 and 6), radiative transition probabilities, branching ratios and radiative lifetimes of Tm3+, Ho3+ ions in co-doped TBZLN glasses were calculated from the optical absorption spectra. Excitation, visible luminescence and decay lifetimes in visible region were also investigated. The stimulated emission and gain cross-sections for the Tm3+:F-3(4) -> H-3(6) (1700 nm) and Ho3+:I-5(7) -> I-5(8) (1956 nm) transitions in co-doped TBZLN glasses have been analyzed and compared with those of other reported glasses. Up-conversion luminescence was observed in TBZLN glasses under 980 nm laser excitation and energy transfer mechanisms have been discussed. Finally, CIE color co-ordinates were calculated and it is observed that the color co-ordinates fall in blue and green regions for Tm3+/Yb3+ and Ho3+/Yb3+ co-doped TBZLN glasses, respectively. A subsequent shift in color co-ordinates from green to greenish-yellow region has been observed with an increase in the concentration (0.1, 0.5 and 1.0 mol%) of Tm3+ ions in Tm3+/Ho3+/Yb3+ triply doped TBZLN glasses. (C) 2015 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
• Processo FAPESP: 09/54066-7 - Laboratório Multiusuário de Espectroscopia Óptica Avançada
• Beneficiário: Yoshitaka Gushikem
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários