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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.)

Expanding broadband emission in the near-IR via energy transfer between Er3+-Tm3+ co-doped tellurite-glasses

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Rivera, V. A. G. [1, 2] ; El-Amraoui, Mohammed [1] ; Ledemi, Y. [1] ; Messaddeq, Y. [1] ; Marega, Jr., E. [2]
Total Authors: 5
[1] Univ Laval, Ctr Opt Photon & Laser, Quebec City, PQ G1V 0A6 - Canada
[2] Univ Sao Paulo, Inst Fis Sao Carlos INOF, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Luminescence; v. 145, p. 787-792, JAN 2014.
Web of Science Citations: 33

Processes of energy transfer in Er3+-Tm3+ co-doped tellurite glasses has permitted to obtain an expanding broadband emission in the near-infrared region covering the bands S, C+L and U of the optical telecommunications and extending up to the 1700-1900 nm range under excitation by a 976 nm laser diode. This widening of the emission band is achieved through an integrated emission, where the Er3+ ions act as donor and the Tm3+ ions as acceptor following the route (Er3+)I-4(11/2)->(Tm3+)H-3(5), (Er3+)I-4(13/2)->(Tm3+)H-3(4) and (Er3+)I-4(13/2)->(Tm3+)F-3(4). The relative intensity emission and lifetime of the I-4(13/2)-> I-4(15/2) transition of the Er3+ ions decrease with increasing the Tm3+ concentration. Besides, high Tm3+ concentrations produce an emission quenching for the H-3(4)-> F-3(4) and F-3(4)-> H-3(6) radiative transitions, due to cross-relaxation between Tm3+ ions. These effects are studied by means of probability and quantum yield of the energy transfer. The most intense and widest emission band is measured in the glass co-doped with 0.075 and 1 mol% of Tm2O3 and Er2O3, respectively. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/21293-0 - Planar waveguides for optical telecommunications from plasmonic
Grantee:Victor Anthony Garcia Rivera
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 09/08978-4 - Planar Waveguide for Telecommunications from Plasmons
Grantee:Victor Anthony Garcia Rivera
Support Opportunities: Scholarships in Brazil - Post-Doctoral