Browsing by Author "Seeber, Wolfgang"
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- ItemEstimation of deep-uv and uv absorption coefficients of selected trace impurities in glasses(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1997) Seeber, Wolfgang; Ehrt, DorisGlasses of the fluoride phosphate type were selected as suitable host materials for studying the uv absorption behavior of several transidon metal ions in different valence states (Fe²⁺/³⁺, Cu⁺/²⁺, Pb²⁺, Ni²⁺, Cr³⁺). Based on a large glass sample collecdon with series of transition metal-ion-doped fluoride phosphate glasses together with a carefully analytically determined real impurity content, the specific uv absorption spectra of the mentioned ions could be estimated using nonlinear deconvolution of bands.
- ItemSpectroscopic investigations of the Er3+ fluorescence transitions at 540 nm and 1.5 µm in fluoride phosphate and phosphate glasses(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1993) Ebendorff-Heidepriem, Heike; Seeber, Wolfgang; Ehrt, DorisFluoride phosphate glasses with different phosphate contents and metaphosphate glasses, both with different Er3+ concentrations of 3 to 10 ∙ 10^19 cm^-3, were prepared. The lifetimes and the intensities of the fluorescence transitions 4S3/2 → 4I15/2 at 540 nm and 4I13/2 → 4I15/2 at 1.5 µm have been studied as a function of phosphate content and Er3+ concentration. The results have been discussed by considering the rates of radiative decay, multiphonon relaxation, cross relaxation and energy transfer to hydroxyl groups. Furthermore, laser action of some fluoride phosphate glasses via krypton ion laset pumping was achieved.