Abstract

Upconversion fluorescence in an erbium-doped transparent oxyfluoride glass ceramic is studied by use of fluorescence decays and time-dependent fluorescence and excitation spectra. Sequential two-photon absorption upconversion and energy transfer upconversion are reported, and their origins are identified. Sequential two-photon absorption upconversion is produced primarily in the glass phase, and energy transfer upconversion originates exclusively in the crystalline phase.

© 2005 Optical Society of America

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