All band amplifier
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United States of America Patent
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-
Jun 3, 2003
Grant Date -
May 30, 2002
app pub date -
Jan 22, 2001
filing date -
Jun 16, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A Raman amplifier apparatus includes an optical transmission line with an input to receive an optical signal, an output that passes the optical signal, a first Raman gain fiber and a second Raman gain fiber. A first WDM is positioned between the second Raman gain fiber and the output. A first set of pump wavelengths is input to the first WDM. A second WDM is positioned between the first and second Raman gain fibers. A second set of pump wavelengths is input to the second WDM. At least a portion of the first set of pump wavelengths are different than the second set of pump wavelengths. The first and second set of pump wavelengths propagate in the same direction.
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