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Type: Artigo de evento
Title: Photothermal Spectroscopic Characterization In Teliurite Glasses Codoped With Rare-earth Ions
Author: Pilla V.
Chillcce E.F.
Rodriguez E.
Catunda T.
Munin E.
Cesar C.L.
Barbosa L.C.
Abstract: Thermal Lens (TL) and spectroscopic characterizations were performed in 70TeO2-19WO3-7Na2O-4Nb2O 5 (mol%) tellurite glasses. TL measurements were accomplished in Er3+/Tm3+ co-doped tellurite glasses in function of the Tm2O3 concentration (0.4 -1.6 ×1020 ions/cm3). Fluorescence spectra at 488 nm showed that Er 3+/Tm3+co-doped tellurite glasses present several emission bands between (500-1800) nm. However, the more iniense emission bands correspond to the Er3+ and Tm3+ transitions ( 4I13/2 → 4I15/2 and 3F4 → 3H6), respectively. The absolute nonradiative quantum efficiency (φ) was determined by TL method. Higher values of φ were obtained with the increase of Tm2O 3 concentration inside of the Er3+/Tm3+ co-doped tellurite glasses. These results are corroborated by the Judd-Ofelt calculations.
Rights: aberto
Identifier DOI: 10.1117/12.646583
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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