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18 August 2004 Optical spectroscopy of Er3+ and Ce3+-codoped TeO2-WO3-Na2O glasses
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In this work we report on spectroscopic properties of Er3+-doped and Er3+/Ce3+-codoped tungsten-tellurite glasses of molar composition 45 TeO2: 39 WO3: 15 Na2O: 1 Er2O3 and 43 TeO2: 39 WO3: 15 Na2O: 1 Er2O3: 2 CeO2, respectively. Vibrational properties were investigated by Raman spectroscopy. The measured absorption spectra were analyzed by McCumber theory, in order to obtain radiative transition rates and stimulated emission cross sections. The study of de-excitation dynamics of the 4I11/2 and 4I13/2 Er3+ states upon pulsed excitation at 532 nm shows that Ce3+ codoping is highly effective in favoring the population feeding of the 4I13/2 Er3+ level.
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Maurizio Mattarelli, Mohamed Bouazaoui, Bruno Capoen, Sylvia Turrell, Alessandro Chiasera, Maurizio Ferrari, Luca Zampedri, Maurizio Montagna, Hervé Portales, Gualtiero Nunzi-Conti, and Giancarlo C. Righini "Optical spectroscopy of Er3+ and Ce3+-codoped TeO2-WO3-Na2O glasses", Proc. SPIE 5451, Integrated Optics and Photonic Integrated Circuits, (18 August 2004);

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