Abstract

Persistent spectral hole burning (PSHB) is demonstrated in the F07D05 optical transition of Eu3+ doped into crystals of BaFCl. For Eu3+ ions at two different lattice sites, persistent holes can be burned at temperatures below 77  K. The characteristics of the hole-burning process suggest that the observed PSHB effect is due to laser-excitation-induced site-to-site conversion. One type of Eu3+ site is converted into another type of defect site. This process is not optically reversible, and holes can be erased only when the temperature increases to 150  K.

© 1999 Optical Society of America

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