Er3+-doped germanate glasses for active waveguides prepared by Ag+/K+ <-> Na+ ion-exchange
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Elsevier B.V.
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Planar waveguides were prepared by Ag+/K+ <-> Na+ ion-exchange on Er+3 -doped GeO2-ZnO-Na2O-Li2O glasses obtained by a melting-casting method. Optical parameters of the waveguides were measured at 543.5, 632.8, and 1550 nm by m-line technique as a function of the Ag+ ion-exchange time. The optimized planar waveguides show an effective diffusion depth (d) of 2.95 mu m and well confined propagating TE0 and TM0 modes at 1550 nm. Spectroscopic properties as photoluminescence emission and emission decay time were evaluated for the erbium-doped planar waveguide, indicating that Ag+ <-> Na+ ion-exchange enhance the photoluminescence emissions in the green and infrared regions from erbium ions. The glass system studied is promising to be applied as optical amplifiers in the C-telecom band. Green emission sensitized by Ag+ was also observed. (c) 2008 Elsevier B.V. All rights reserved.
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Journal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 354, n. 42-44, p. 4743-4748, 2008.
