Abstract
We report broadband downconversion from ultraviolet to near-infrared in -doped oxygen-deficient glasses. Oxygen-deficient centers are introduced in germanate glasses by adding metal Al instead of corresponding oxide . Tunable luminescence related to these defects is observed. Conversion of broadband ultraviolet light to blue-green tunable luminescence and to near-infrared emission is detected in glasses. The energy transfer efficiency increases with increasing concentration. The dependence of energy transfer efficiency on wavelength is also discussed.
© 2009 Optical Society of America
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