Optical: systems and elements – Optical amplifier – Raman or brillouin process
Reexamination Certificate
2005-04-26
2005-04-26
Black, Thomas G. (Department: 3663)
Optical: systems and elements
Optical amplifier
Raman or brillouin process
Reexamination Certificate
active
06885498
ABSTRACT:
A multi-stage optical amplifier includes at least a distributed Raman amplifier fiber and a discrete amplifier fiber. The amplifier is configured to be coupled to at least one signal source that produces a plurality of signal wavelengths λs; and at least a first pump source that produces one or more pump beam wavelengths λp. A signal input port is coupled to the amplifier. A signal output port is coupled to the amplifier. The distributed Raman and discrete amplifier fibers are positioned between the signal input port and the signal output port. A first pump input port is coupled to a first end of the distributed Raman amplifier fiber. A second pump input port is coupled to a second end of the distributed Raman amplifier fiber. The first end is located closer to the signal input port than the second end. A third pump input port is coupled to the discrete amplifier fiber.
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Baker & Botts L.L.P.
Black Thomas G.
Hughes Deandra M.
Xtera Communications Inc.
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