Fabrication and upconversion luminescence of Er3+/Yb3+ codoped TeO2–WO3–Na2O–Nb2O5–Al2O3 glass fibers

Abstract The tellurite fibers based on glasses with the composition TeO 2 –WO 3 –Nb 2 O 5 –Na 2 O–Al 2 O 3 –Er 2 O 3 –Yb 2 O 3 were fabricated by the rod-in-tube technique using a Heathway drawing tower. The upconversion luminescence of Er 3+ /Yb 3+ codoped tellurite glass fibers under 980 nm excitation were investigated. The Er 3+ /Yb 3+ co-doped tellurite fibers show an efficient up-conversion process in comparison with the Er 3+ -doped tellurite fibers. The pump power dependent intensities were discussed, which showed that two photons are involved in the upconversion process.

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