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Spectroscopic properties of Er 3+ doped bismuth glass has been reported on the basis of J–O theory. The upconversions observed due to energy transfer in Er 3+ doped bismuth glass have been studied and explained. The effect of temperature on the luminescence intensity of the bands has been monitored and it is inferred that these may be used to sense the temperature with appreciable...
Optical absorption, luminescence and upconversion (NIR to Visible) in Pr 3+ doped tellurite glass at different concentrations of Pr 3+ have been studied and several optical properties of the glass have been shown. For upconversion the first NIR photon is absorbed non-resonantly to populate 1 G 4 level through phonon assisted excitation. The excited Pr 3+ ion...
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