Apparatus for providing optical radiation
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United States of America Patent
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Issued Date -
Aug 25, 2011
app pub date -
Apr 29, 2011
filing date -
May 11, 2006
priority date (Note) -
Abandoned
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Abstract
The core includes silica, a concentration of alumina of between approximately 0.3 to 0.8 mole percent, a concentration of phosphate of substantially 15 mole percent, a concentration of ytterbium substantially in the range 20000 to 45000 ppm. The pedestal can include silica, phosphate and germania. The core can have substantially zero thulium dopant.
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