Reflective erbium-doped amplifier
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United States of America Patent
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Mar 2, 2004
Grant Date -
Jul 24, 2003
app pub date -
Jan 23, 2002
filing date -
Jan 23, 2002
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Abstract
The meters of coiled silica fiber in conventional R-EDFAs is replaced with an ultra-short high-gain waveguides formed of co-doped erbium-ytterbium multi-component glass a few centimeters in length. The compact R-EDA is pumped using non-conventional multi-mode pumps that couple to the waveguide cladding. The multi-component glasses support doping concentrations of the rare-earth ions erbium and ytterbium far in excess of levels believed possible with conventional glasses. These dopant levels in combination with the reflective scheme make a compact R-EDA with sufficient amplification possible.
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