All band amplifier
First Claim
Patent Images
1. A method of amplification, comprising:
- providing a Raman amplifier apparatus including 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;
introducing into the input a signal with multiple wavelengths;
amplifying the signal in the Raman amplifier apparatus, wherein a majority of longer wavelengths of the signal are amplified before shorter wavelengths of the signal are amplified; and
producing an amplifier output.
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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.
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Citations
60 Claims
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1. A method of amplification, comprising:
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providing a Raman amplifier apparatus including 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;
introducing into the input a signal with multiple wavelengths;
amplifying the signal in the Raman amplifier apparatus, wherein a majority of longer wavelengths of the signal are amplified before shorter wavelengths of the signal are amplified; and
producing an amplifier output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23)
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17. A method of amplification, comprising:
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providing an amplifier apparatus including a first pump source coupled to a first port of an optical transmission line, a second pump source coupled to a second port of the optical transmission line, an output that passes an optical signal, a first gain fiber and a second gain fiber;
introducing signals to an input of the optical transmission line;
pumping the first gain fiber with a second set of pump wavelengths and the second gain fiber with a first set of pump wavelengths;
wherein at least a portion of the first set of pump wavelengths is different than the second set of pump wavelengths;
wherein a majority of longer wavelengths of the signal are amplified before shorter wavelengths of the signal are amplified; and
producing an amplifier output.- View Dependent Claims (18, 19, 20, 21, 22, 24)
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25. A method of amplification, comprising:
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receiving a multiple wavelength optical signal at a Raman amplifier apparatus comprising an input to receive the optical signal, an output that passes at least a portion of the optical signal, a first Raman gain fiber and a second Raman gain fiber;
amplifying the signal in the Raman amplifier apparatus, wherein a majority of longer wavelengths of the signal are amplified before a majority of shorter wavelengths of the signal are amplified; and
producing an amplifier output. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. An optical amplifier including a Raman amplifier apparatus comprising:
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an input operable to receive a multiple wavelength optical signal;
an output that passes at least a portion of the optical signal;
a first Raman gain fiber; and
a second Raman gain fiber;
wherein the first and second Raman gain fibers are pumped so as to amplify the signal in the Raman amplifier apparatus, wherein a majority of longer wavelengths of the signal are amplified before a majority of shorter wavelengths of the signal are amplified. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification