Abstract

Praseodymium- and dysprosium-doped lanthanum halide powders have been synthesized by a sol-gel–reactive-atmosphere approach. Emission at 1.3 µm from a sol-gel-derived material was observed for the first time to our knowledge. Measured lifetimes corresponded to radiative quantum efficiencies of approximately 8% for Pr3+:LaF3, 72% for Pr3+:LaCl3, and 78% for Dy3+:LaCl3. The spectroscopic properties of these hosts are shown to be comparable with those of melt-grown single-crystal analogs, verifying the ability of inexpensive and low-temperature solution-based methodologies to produce low-phonon-energy materials.

© 1997 Optical Society of America

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