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Excited-State Absorption in Fluorescent Uranium, Erbium, and Copper–Tin Glasses

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Abstract

To observe the excited-state absorption in silicate glasses which contain UO22+, Er3+, or a copper–tin system, the glasses were excited to a long-lifetime state by pumping with a xenon flashtube. Absorptions from this excited state to higher states were monitored by a second flash. From these data, Δα, the change of absorbance was calculated. Observations were made for wavelengths between 0.4 μ and 1.1 μ. Strong excited-state absorption bands appeared at 0.537 μ in the UO22+ ion, and at 0.479 μ in the Er3+ ion. In the copper–tin glasses, the effect decreased toward longer wavelengths.

© 1967 Optical Society of America

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