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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Seshadri, M. [1] ; Barbosa, L. C. [1] ; Cordeiro, C. M. B. [1] ; Radha, M. [1] ; Sigoli, F. A. [2] ; Ratnakaram, Y. C. [3]
Total Authors: 6
[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
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 166, p. 8-16, OCT 2015.
Web of Science Citations: 14

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)

FAPESP's process: 12/50480-6 - Study of rare earth spectroscopy on glass and optical fibers of tellurite-based glass with potential applications in solid state lasers and non-linear devices
Grantee:Seshadri Meruva
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 09/54066-7 - Multi-User Laboratory for Advanced Optical Spectroscopy
Grantee:Yoshitaka Gushikem
Support Opportunities: Multi-user Equipment Program