All band amplifier
AssigneeXtera Communications, Inc., a Delaware corporation
InventorsMohammed N. Islam, Carl Dewilde, Michael Freeman
Life of this patent
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Abstract
A Raman amplifier apparatus includes an optical transmission line with an input to receive an optical signal, an output that passes the optical signal, a first Raman gain fiber and a second Raman gain fiber. A first WDM is positioned between the second Raman gain fiber and the output. A first set of pump wavelengths is input to the first WDM. A second WDM is positioned between the first and second Raman gain fibers. A second set of pump wavelengths is input to the second WDM. At least a portion of the first set of pump wavelengths are different than the second set of pump wavelengths. The first and second set of pump wavelengths propagate in the same direction.
Claims105
A Raman amplifier apparatus, comprising:
- an optical transmission line including an input to receive an optical signal, an output operable to pass at least a portion of the optical signal, a first Raman gain fiber and a second Raman gain fiber;
- a first optical coupler positioned between the second Raman gain fiber and the output, wherein a first plurality of pump wavelengths is input to the first optical coupler, and wherein at least two of the first plurality of pump wavelengths comprise different center wavelengths;
- and
- a second optical coupler positioned between the first and second Raman gain fibers, wherein a second plurality of pump wavelengths is input to the second optical coupler, and wherein at least two of the second plurality of pump wavelengths comprise different center wavelengths;
- wherein at least a portion of the first plurality of pump wavelengths comprise different center wavelengths than the second plurality of pump wavelengths, and wherein the first and second pluralities of pump wavelengths propagate in a same direction.
An optical amplifier, comprising:
- an optical fiber including a signal input port, an optical signal output port, at least a first Raman gain fiber and a second Raman gain fiber;
- a first optical coupler positioned between the second Raman gain fiber and the output port, the first optical coupler configured to be coupled to a first pump source that produces a first plurality of pump wavelengths, at least some of the first plurality of pump wavelengths having different center wavelengths;
- and
- a second optical coupler positioned between the first and second Raman gain fibers, the second optical coupler configured to be coupled to a second pump source that produces a second plurality of pump wavelengths, at least some of the first plurality of pump wavelengths having different center wavelengths;
- wherein at least a portion of the first plurality of pump wavelengths comprise different center wavelengths than the second plurality of pump wavelengths, and wherein the optical signal travels in a first direction, and the first and second pluralities of pump wavelengths travel in a reverse direction relative to the first direction.
An amplifier apparatus, comprising:
- an optical transmission line including an input to receive an optical signal, an output that passes the optical signal, a first gain fiber and a second gain fiber;
- a first optical coupler positioned between the second gain fiber and the output, wherein one or more first pump wavelengths is input to the first optical coupler;
- and
- a second optical coupler positioned between the first and second gain fibers, wherein one or more second pump wavelengths is input to the second optical coupler;
- wherein at least one of the one or more first pump wavelengths is different than the one or more second pump wavelengths, and wherein the one or more first and one or more second pump wavelengths propagate in a same direction;
- and
- wherein the second optical coupler substantially passes at least a portion of the optical signal and at least a portion of the one or more first pump wavelengths.
Dependencies are inferred from the claim text.