Erbium and Ytterbium Codoped Titanoniobophosphate Glasses for Ion-Exchange-Based Planar Waveguides
This work presents the optical properties of erbium-doped and erbium/ytterbium codoped Na2O–Al2O3–TiO2–Nb2O5–P2O5 glass systems and also the characterization of planar waveguides obtained by typical thermally assisted Ag+↔Na+ ion-exchange process. The glass systems allow the preparation of single mode and multimode planar waveguides presenting a strong and relatively broad emission at 1536 nm. The emission signal in the infrared region is intensified for silver-containing samples when compared with free-silver samples. The emission signal intensification may be attributed to a nonplasmonic energy transfer from silver species to Er3+ ions as no bands related to surface plasmon resonance (SPR) of silver nanoparticles were observed.
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