Abstract
We fabricated a series of glasses with the composition . Characteristic absorption bands of bismuth centered at 500, 700, 800, and were observed. Adding was found to decrease the strength of bismuth absorption. The addition of 3%–4% resulted in a 50% increase in lifetime, a 20-fold increase in quantum efficiency, and a 28-fold increase in the product of emission cross section and lifetime on the 0% composition. We propose that the absorption band relates a different bismuth center than the other absorption bands.
© 2008 Optical Society of America
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