Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-05-02
2006-05-02
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07038842
ABSTRACT:
Raman amplifiers with improved signal to noise ratio and four-wave mixing product suppression are provided. In one embodiment, both co-propagating and counter-propagating pump energy are employed to cause Raman amplification effects within a fiber. Improved Raman amplification performance including improved four-wave mixing product suppression facilitates longer distance transmission without regeneration of optical signals and/or denser WDM channel spacings.
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Forghieri Fabrizio
Griseri Enrico
Aka Chan LLP
Cisco Technology Inc.
Hellner Mark
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