Er3+ doped tellurite glasses have recently gained interest because of broad emission band in 1.5 mum telecom window. In this paper we present results of our research aiming at the fabrication of surface waveguides in these glasses. Tungsten-tellurite and zinc-tellurite glasses doped with various Er2O3 percentages :have been prepared and the glass stability has been assessed based on difference between T-g and T-c (and T-m) when changing glass modifiers. Broad emission and absorption bands corresponding to transition between I-4(13/2)<---->I-4(15/2) were observed as expected. Lifetimes of the 4 1,3,2 level were also measured. Ag+-Na+ ion-exchange was performed with a molten salt composition based on AgNO3, KNO3 and NaNO3. Surface quality of the processed samples was analyzed in order to assess the homogeneity and chemical durability of the surface waveguides. Waveguiding was successfully obtained in both types of glasses and the process was characterized with the prism coupling technique. Several propagation modes at different wavelengths were detected and the diffusion process was characterized for the different concentrations of erbium ions.
Ion-exchanged planar waveguides in different Er3+-doped tellurite glasses
BETTINELLI, Marco Giovanni;SPEGHINI, Adolfo;
2003-01-01
Abstract
Er3+ doped tellurite glasses have recently gained interest because of broad emission band in 1.5 mum telecom window. In this paper we present results of our research aiming at the fabrication of surface waveguides in these glasses. Tungsten-tellurite and zinc-tellurite glasses doped with various Er2O3 percentages :have been prepared and the glass stability has been assessed based on difference between T-g and T-c (and T-m) when changing glass modifiers. Broad emission and absorption bands corresponding to transition between I-4(13/2)<---->I-4(15/2) were observed as expected. Lifetimes of the 4 1,3,2 level were also measured. Ag+-Na+ ion-exchange was performed with a molten salt composition based on AgNO3, KNO3 and NaNO3. Surface quality of the processed samples was analyzed in order to assess the homogeneity and chemical durability of the surface waveguides. Waveguiding was successfully obtained in both types of glasses and the process was characterized with the prism coupling technique. Several propagation modes at different wavelengths were detected and the diffusion process was characterized for the different concentrations of erbium ions.
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