Abstract

We report on the use of 800nm, 250kHz femtosecond laser pulses to precipitate Er3+-doped CaF2 crystals inside oxyfluoride glass, which was confirmed with x-ray diffraction analysis. Confocal upconversion luminescence spectra show that the precipitated crystals have greatly enhanced upconversion luminescence intensity in comparison with unmodified glass. We demonstrate the possibility of three-dimensional optical data storage in the glass by the use of the confocal upconversion luminescence imaging.

© 2009 Optical Society of America

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