GeO 2�PbO�Bi 2O 3 glasses doped with Yb 3+ for laser applications (original) (raw)
Glasses of heavy metal oxide GeO 2 -PbO-Bi 2 O 3 doped with different concentrations of Yb 3+ were prepared as materials for IR emission. Absorption and fluorescence emission spectra were measured. The spectroscopic properties and laser parameters are calculated; the disagreement between the reciprocity method and Fuchtbauer-Ladenburg formula in calculations of Yb 3+ emission cross-sections is discussed using the radiation trapping effect. GeO 2 -PbO-Bi 2 O 3 glass doped with Yb 3+ is a promising material for laser action at 1021 nm, with properties similar to other known glasses (phosphate and tellurite laser glasses) used as active laser media; the high absorption cross-section (of 1.5 · 10 À20 cm 2 ) and the large emission bandwidth (of 70 nm) are properties appropriate for short pulse generation.
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