Abstract
In this work the multiwavelength thermal lens method is applied to determine the absolute value of fluorescence quantum efficiency of low silica calcium aluminosilicate glasses doped with different concentrations of neodymium dioxide melted under vacuum condition. The experiments were performed using five different excitation wavelengths: 514, 532, 750, 810 and 890 nm. The results were in agreement with those provided by the Judd-Ofelt model.
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