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Proceedings Paper

Optical characterization, luminescence properties of Er3+ and Er3+/Yb3+ co-doped tellurite glasses for broadband amplification
Author(s): Seshadri Meruva; Barbosa Luiz Carlos; Ferencz Junior Julio Alberto Peres
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Paper 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-ZnONb2O5) 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 4I13/24I15/2 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 Er3+ 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 4I13/2 level were reported for all glass matrices.

Paper Details

Date Published: 7 March 2014
PDF: 10 pages
Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 896132 (7 March 2014); doi: 10.1117/12.2037000
Show Author Affiliations
Seshadri Meruva, Univ. Estadual de Campinas (Brazil)
Barbosa Luiz Carlos, Univ. Estadual de Campinas (Brazil)
Ferencz Junior Julio Alberto Peres, Univ. Estadual de Campinas (Brazil)


Published in SPIE Proceedings Vol. 8961:
Fiber Lasers XI: Technology, Systems, and Applications
Siddharth Ramachandran, Editor(s)

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