Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2007-09-25
2007-09-25
Chan, Jason (Department: 2613)
Optical communications
Transmitter and receiver system
Including compensation
Reexamination Certificate
active
09991126
ABSTRACT:
A system, amplifier and method are provided for amplifying an optical signal in an optical communications system where spans between amplifiers may vary. The system includes a Raman amplifier variable gain portion and an EDFA gain portion. The amount of Raman amplifier gain is chosen to trade off accumulation of noise with accumulation of multi-path interference. This variable Raman gain is used to equalize the loss of each span so that the amount of optical power supplied at the input of the EDFA gain portion is substantially constant throughout the system.
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Golovchenko Ekaterina
Nagel Jonathan
Nissov Morten
Pilipetskii Alexei A.
Ten Sergey
Chan Jason
Grossman Tucker Perreault & Pfleger PLLC
Tyco Telecommunications (US) Inc.
Wang Quan-Zhen
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