Abstract

The spectra, intensity, and duration of trivalent erbium luminescence in a large number of inorganic glasses of various compositions were investigated. The observed absorption and luminescence bands were attributed to transitions between certainsLj levels of the Er3+ ion. It is shown that in all cases the principal portion of the luminescence yield was associated with the4I13/2 →4I15/2 transition band withνmax = 6500 cm−1. The effects of glass composition, activator concentration, and temperature on the yield and duration of luminescence in the 6500 cm−1 band were studied. An investigation of the effect of temperature on the structure of this band was used to construct a diagram of the crystalline splitting of the4I13/2 and4I15/2 levels in glass.

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