Uniform upconversion in erbium-doped silicate glasses is investigated as a function of glass composition, concentration, and fabrication method. Comparisons of upconversion coefficients are made among soda lime silicate and aluminosilicate bulk glasses and soda lime silicate waveguides. Comparisons are also made with studies performed by other researchers. The results indicate that both the composition and the preparation method of the glass affect the value of the upconversion coefficient, with as much as a factor-of-4 variation observed at fixed Er(3+) concentration. Values of the upconversion coefficient are found to be consistent with the Förster-Dexter microscopic model.

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This is a study of a group of Czochralski grown rare‐earth‐doped Y2SiO5 single‐crystal cathodoluminescent phosphors. Such dopants as Ce3+, Tb3+, Eu3+, Sm3+, Tm3+, Gd3+, and some of their combinations were investigated. Activation by false(Ce3++Gd3+false) , false(Tb3++Gd3+false) , and by false(Tb3++Eu3+false) produced the most efficient blue, green, and red phosphors, respectively. In comparison with our previous best garnet single‐crystal phosphor system, the Y2SiO5‐normalbased blue, green, and red phosphors are by factors 12.7, 1.23, and 0.7 brighter, respectively. Gd3+:Y2SiO5 was shown to be an efficient single line (313 nm) emitting phosphor of very high spectral brightness in UV.