Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/87080
Type: Artigo de evento
Title: Optical Characterization, Luminescence Properties Of Er3+ And Er3+/yb3+ Co-doped Tellurite Glasses For Broadband Amplification
Author: Meruva S.
Carlos B.L.
Alberto Peres F.J.J.
Abstract: In the present paper, optical absorption and emission spectra and luminescence decay lifetimes of different concentrations, 0.1, 0.3, 0.5, 0.7 and 1.0 mol% of Er3+ and 0.1Er3+/0.5Yb3+ co-doped tellurite glasses (TeO2-Bi2O3-ZnONb 2O5) were reported. Judd-Ofelt intensity parameters were determined and used to calculate spontaneous radiative transition probabilities (Arad), radiative lifetimes (τR), branching ratios (β) and stimulated emission cross-sections (σP) for certain emission transitions. NIR emission at 1.5μm and up-conversion spectra of Er3+ and Er3+/Yb3+ co-doped tellurite glasses were measured under excitation wavelength of 980 nm. The absorption, emission and gain cross-sections for 4I13/2→ 4I15/2 transition of Er3+ are determined. The peak emission cross-section of this transition is found to be higher (9.95×10-21 cm2) for 0.1 mol% of Er3+ and lower (6.81×10-21 cm2) for 1.0 mol% of Er 3+ doped tellurite glasses, which is comparable to other oxide glasses. The larger peak emission cross-section for lower concentration of Er3+ is due to the high refractive index of glass matrix (2.1547), relation established from Judd-Ofelt theory. The observed full-widths at half maxima (FWHM) for lower and higher concentrations of Er3+ are 64nm and 96 nm respectively. The larger values of FWHM and peak emission cross-sections are potentially useful for optical amplification processes in the design of Erbium doped fiber amplifiers (EDFs). Under 980 nm excitation three strong up-conversion bands were observed at 530nm, 546nm and 665nm. The pump power dependent intensities and mechanisms involved in the up-conversion process have been studied. The luminescence decay profiles for 4I 13/2 level were reported for all glass matrices. © 2014 SPIE.
Editor: SPIE
Rights: aberto
Identifier DOI: 10.1117/12.2037000
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-84900811295&partnerID=40&md5=28dd84f5f3fe537dfe018f6bb84afb5e
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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