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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.)

Enhancement of spectroscopic and luminescence properties of Er3+ doped tellurite glasses by adding P2O5 for lasing materials

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Jlassi, I. [1, 2] ; Fares, H. [3] ; Elhouichet, H. [1, 2]
Total Authors: 3
[1] Ctr Natl Rech Sci Mat, Lab Physicochim Mat Mineraux & Leurs Applicat, BP. 95, Hammam Lif 2050 - Tunisia
[2] Univ Tunis El Manar, Fac Sci Tunis, Dept Phys, Campus Univ Farhat Hachad, Elmanar 2092 - Tunisia
[3] Sao Paulo State Univ, UNESP, Inst Chem, POB 355, BR-14801970 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 194, p. 569-578, FEB 2018.
Web of Science Citations: 7

Er3+-doped phosphor-tellurite glasses has been synthesized by conventional melting method. Results of differential scanning calorimetry (DSC) measurements indicate a good thermal stability of tellurite glasses. The DSC measurements show an improvement of thermal stability of glass hosts after adding P2O5. The structures of glasses were investigated by X-ray diffraction (XRD) and Raman spectroscopy to understand their dependence of structure on composition. Absorption spectrum from near infrared to visible was obtained and the JuddOfelt (J-O) intensity parameters (Omega(2), Omega(4), and Omega(6)) were determined. Spontaneous emission probabilities of some relevant transitions, branching ratio, and radiative lifetimes of several excited states of Er3+ have been predicted using intensity J-O parameters. Up-conversion luminescence characteristics, under 977 nm excitation wavelength, have been investigated at room and low temperature in these glasses. Intense green and red emissions from Er3+ centered at 534 nm, 548 nm and 660 nm, corresponding to the transitions H-2(11/2)-> I-4(15/2), S-4(3/2)-> I-4(15/2) and F-4(9/2)-> I-4(15/2), respectively, were simultaneously observed. The quadratic dependence of the up-conversion emission on the excitation power indicates that two-photon steps are involved for the three visible emission bands. The PL lifetimes is found to decrease in the temperature range 77-300 K. Using the Mc-Cumber method, emission cross-section (sigma(e)), Absorption cross-section (sigma(a)), and gain cross-section (G(lambda)) for the I-4(13/2)-> I-4(15/2) transition, were calculated. By analyzing obtained data based to all advantages after adding P2O5, the tellurite glasses can be used as potential host material for developing optical amplifiers applied for 1.53 mu m band broad and high-gain erbium-doped fiber amplifiers (EDFA). (AU)

FAPESP's process: 16/16343-2 - Synthesis and characterization of glass and glass-ceramics containing rare earth ions
Grantee:Hssen Fares
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC