Amplitude balancing for multilevel signal transmission
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United States of America Patent
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-
Mar 27, 2007
Grant Date -
Aug 7, 2003
app pub date -
Nov 25, 2002
filing date -
Nov 29, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Arrangements are provided for an amplitude balanced optical amplifier. A combination of an optical preamplifier and a gain/loss variation modification device (VMD) is employed. The gain/loss VMD compensates the gain variation across different wavelength channels introduced by the preamplifier. The gain/loss VMD operates based on a gain/loss profile that is complementary to that of the preamplifier. More than one amplifier may be deployed. In addition, feedback control may be applied to either the preamplifier or the gain/loss VMD to dynamically control the performance.
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