engleski

Novel Tm(3+)-doped fluorotellurite glasses with enhanced quantum efficiency

In this paper, new highly Tm(3+)-doped tellurite glasses with host composition 75TeO(2)-xZnF(2)-yGeO(2)-12PbO-3Nb(2)O(5) [x(5-15), y(0-5) mol%] are presented and compared to the Tm-doped tellurite glasses based on the traditional host composition: 75TeO(2)-20ZnO-5Na(2)O mol%. Enhanced quantum efficiency from (3)F(4) level was observed for the proposed glasses and thermal stability and viscosity values make them suitable for optical fiber drawing. Besides the host composition, substantial influence of Tm(3+) concentration on luminescence and lifetime of excited (3)F(4) and (3)H(4) states were discussed.

fluorotellurite glass ; thulium ; Judd-Ofelt ; energy transfer

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