Preparation and performance of Cr3+/Tm3+/Ho3+ co-doped fluorophosphate glasses
Acta Physica Sinica(2008)
Abstract
Fluorophosphate glasses with various Al(PO3)3 contents were prepared, and their structure, thermal properties and spectral properties were studied. The emission properties at around 2.0 μm of Cr3+/Tm3+/Ho3+ co-doped fluorophosphate glasses with different mole fractions of Tm3+ and Ho3+ were studied. The spectral strength parameters Ωt (t = 2, 4, 6) of those glasses have been calculated. Meanwhile, the spectral parameters, including the oscillator strength, spontaneous emission probability and branching ratios of Ho3+, have been calculated. The results show that the 2.0 μm emission intensity gradually grows higher with the increase of the mole fraction of Tm3+. The Tm3+→(3F4)→Ho3+ (5I7) energy transfer in (Tm3+/Ho3+) co-doped fluorophosphate glasses is very efficient, and it is dependent on the doping concentration.
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Key words
Absorption spectra,Energy transfer,Fluorescence spectra,Fluorophosphate glasses
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