Abstract
This paper reports on the spectroscopic and structural properties in -doped oxyfluorotellurite glasses. The compositional variation accounts for the evolutions of Raman spectra, Judd–Ofelt parameters, radiative properties, and fluorescent emission. It is found that, when maximum phonon energy changes slightly, phonon density plays a crucial role in quenching the 2.7 μm emission generated by the transition. The comparative low phonon density contributes strong 2.7 μm emission intensity. The high branching ratio (18.63%) and large emission cross section () demonstrate that oxyfluorotellurite glass contained with 50 mol.% has potential application in the mid-infrared region laser.
© 2015 Optical Society of America
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