Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/319698
Type: Artigo
Title: Doped tellurite glasses: extending near-infrared emission for near-2.0-m amplifiers
Author: Seshadri, M.
Anjos, V.
Bell, M. J. V.
Barbosa, L. C.
Bosco, G. B. F.
Tessler, L. R.
Kumar, J. S.
Graca, M. P. F.
Soares, M. J.
Radha, M.
Ratnakaram, Y. C.
Abstract: Tm3+ singly doped and Tm3+/Ho3+-codoped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were successfully prepared by the melt-quenching technique. Emission characteristics and energy transfer mechanisms were studied upon 785 nm laser diode excitation. A significant enhancement of emission intensity at 1.81 μm with increasing concentration of Tm3+ ions has been observed while increasing the emission intensity at 2.0 μm with increasing concentration of Ho3+ has been observed up to the equal concentration of Tm3+ (0.5 mol%) in TBZLN glasses. The stimulated emission cross section of Tm3+: 3F4 → 3H6 (5.20 × 10-21 cm2) and Ho3+: 5I7 → 5I8 (4.00 × 10-21 cm2) in 1.0 mol% Tm3+-doped and 0.5 mol% Tm3+/1.0 mol% Ho3+-codoped TBZLN glasses are higher compared to the reported and are found to be excellent candidates for solid-state lasers operating at ~1.8 and 2.0 μm, respectively. The extension of NIR emission of Tm3+ with Ho3+ ions provides the possibility of using these materials for broadband NIR amplifiers. © 2016 American Ceramic Society and Wiley Periodicals, Inc.
Tm3+-singly-doped and Tm3+-/Ho3+-codoped TeO2-Bi2O3-ZnO-Li2O-Nb2O5 (TBZLN) tellurite glasses were successfully prepared by the melt-quenching technique. Emission characteristics and energy transfer mechanisms were studied upon 785-nm laser diode excitation. A significant enhancement of emission intensity at 1.81m with increasing concentration of Tm3+ ions has been observed while increase in the emission intensity at 2.0m with increasing concentration of Ho3+ has been observed up to the equal concentration of Tm3+ (0.5mol%) in TBZLN glasses. The stimulated emission cross section of Tm3+: (F4H6)-F-3-H-3 (5.20x10(-21)cm(2)) and Ho3+: (I7I8)-I-5-I-5 (4.00x10(-21)cm(2)) in 1.0mol% Tm3+-doped and 0.5mol% Tm3+/1.0mol% Ho3+-codoped TBZLN glasses are higher compared with the reported and are found to be excellent candidates for solid-state lasers operating at similar to 1.8 and 2.0m, respectively. The extension of near-infrared (NIR) emission of Tm3+ with Ho3+ ions provides the possibility of using these materials for broadband NIR amplifiers.
Subject: Lasers
Propriedades óticas
Fotoluminescência
Country: Estados Unidos
Editor: Wiley-Blackwell Publishing
Rights: fechado
Identifier DOI: 10.1111/ijag.12213
Address: https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/ijag.12213
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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