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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.)

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

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Seshadri, M. [1] ; Chillcce, E. F. [1] ; Marconi, J. D. [2, 1] ; Sigoli, F. A. [3] ; Ratnakaram, Y. C. [4] ; Barbosa, L. C. [1]
Total Authors: 6
[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
Total Affiliations: 4
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 402, p. 141-148, OCT 15 2014.
Web of Science Citations: 16

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)

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