Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2006-03-14
2006-03-14
Hellner, Mark (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
07012741
ABSTRACT:
A wideband amplifier is provided with at least one erbium-doped fiber, for use in a wavelength division multiplexing optical communication system that performs transmission/receipt of wavelength-division-multiplexed optical signals through at least one optical fiber. The wideband amplifier comprises an erbium-doped fiber, pumped by a first pump light that pumps erbium ions and a second pump light that induces a Raman amplification, that amplifies the optical signals, a first pumping light source that outputs a predetermined wavelength of first pump light such that the erbium ions are pumped from the erbium-doped fiber, a first wavelength selective coupler that passes through optical signals amplified at the erbium-doped fiber and that inputs the first pump light into the erbium-doped fiber, a second pumping light source that outputs a predetermined wavelength of the second pump light such that a Raman pumping is performed of the erbium-doped fiber, and a second wavelength selective coupler that passes through optical signals amplified at the erbium-doped fiber and that inputs the second pump light into the erbium-doped fiber.
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Hwang Seong-Taek
Kang Byung-Chang
Bolda Eric
Cha & Reiter L.L.C.
Hellner Mark
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