【摘 要】
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Sm3 /Yb3 co-doped tellurite glasses are prepared by melt-quenching technique. The density of the glasses varies between 4.65 and 4.84 g/cm3. The optical absorption spectra consist of eight bands in the wavelength range of 350–2 000 nm, which correspond t
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Sm3 /Yb3 co-doped tellurite glasses are prepared by melt-quenching technique. The density of the glasses varies between 4.65 and 4.84 g/cm3. The optical absorption spectra consist of eight bands in the wavelength range of 350–2 000 nm, which correspond to the transitions from ground level 6H5/2 to the various excited states of the Sm3 ion. Energy band gaps vary in the range of 2.73–2.91 eV, and the Urbach energy ranges from 0.21 to 0.27. Emission spectra exhibit four peaks originating from the 4G5/2 energy level centered at 576, 613, 657, and 718 nm. Quenches in emission bands may be due to the energy transfer from the Sm3 to Yb3 ions.
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