Yb3+ sensitized Tm3+ upconversion in tellurite lead oxide glass

Triply ionized thulium/thulium – ytterbium doped/codoped TeO2–Pb3O4 (TPO) glasses have been fabricated by classical quenching method. The upconversion emission spectra in the Tm3+/Tm3+–Yb3+ doped/codoped glasses upon excitation with a diode laser lasing at ∼980 nm has been studied. Effect of the addition of the Yb3+ on the upconversion emission intensity in the visible and near infrared regions of the Tm3+ doped in TPO glass has been studied and the processes involved explored.

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► The suitable choice of solid host materials is very important to use as laser host through frequency upconversion in rare earth doped substances.
► Tellurite lead oxide glass has been taken as one of the proposed material.
► Effect of the addition of Yb3+ in Tm3+ doped Tellurite Lead Oxide glass on its upconversion luminescence.
► A process involved in the enhancement of the upconversion intensity is discussed on the basis of efficient energy transfer.