Broadband amplifier and communication system
First Claim
Patent Images
1. A method of communicating WDM wavelengths in a broadband communication system, comprising:
- receiving a plurality of WDM wavelengths at a transmission line;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly that includes a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths, at least a portion of the amplifier assembly including a dispersion compensating fiber with a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths; and
receiving the plurality of amplified WDM wavelengths at a receiver assembly.
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Accused Products
Abstract
A method of broadband amplification divides an optical signal of wavelength of 1430 nm to 1620 nm at a preselected wavelength into a first beam and a second beam. The first beam is directed to at least one optical amplifier and produces an amplified first beam. The second beam is directed to at least one rare earth doped fiber amplifier to produce an amplified second beam. The first and second amplified beams are combined.
166 Citations
83 Claims
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1. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths at a transmission line;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly that includes a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths, at least a portion of the amplifier assembly including a dispersion compensating fiber with a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths; and
receiving the plurality of amplified WDM wavelengths at a receiver assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 77)
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8. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths at a transmission line, at least a portion of the transmission line having a magnitude of dispersion of at least 5 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly that includes a serial combination of a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths; and
receiving the plurality of amplified WDM wavelengths at a receiver assembly;
wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all WDM wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier. - View Dependent Claims (9, 10, 11, 12, 13, 76, 78)
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14. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths at a transmission line, at least a portion of the transmission line having a magnitude of dispersion of less than 5 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly that includes a serial combination of a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths, and receiving the plurality of amplified WDM wavelengths at a receiver assembly;
wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all WDM wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths at a transmission line;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly that includes a serial combination of a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths, wherein at least a portion of the WDM wavelengths are in the wavelength range of 1530 to 1630 nm, and wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier; and
receiving the plurality of amplified WDM wavelengths at a receiver assembly. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths;
amplifying at least a portion of the plurality of WDM wavelengths to create a plurality of amplified WDM wavelengths with a Raman amplifier assembly that includes a gain control device and a serial combination of a distributed Raman amplifier and a discrete Raman amplifier; and
wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 79)
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39. A method of communicating WDM wavelengths in a broadband communication system, comprising:
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receiving a plurality of WDM wavelengths along a transmission line, at least a portion of the transmission line having a different sign of dispersion for at least a portion of the plurality of WDM wavelengths;
amplifying at least a portion of the plurality of WDM wavelengths with a Raman amplifier assembly tat includes a serial combination of a distributed Raman amplifier and a discrete Raman amplifier to create a plurality of amplified WDM wavelengths; and
receiving the plurality of amplified WDM wavelengths at a receiver assembly;
wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. A multi-stage optical amplifier system, comprising:
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a plurality of transmitters that produce a plurality of WDM wavelengths;
a multi-stage optical amplifier including;
a Raman amplifier assembly including a distributed Raman amplifier and a discrete Raman amplifier, at least a portion of the amplifier assembly having a dispersion compensating fiber with a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths; and
a plurality of receivers coupled to the multi-stage optical amplifier. - View Dependent Claims (48, 49, 50, 51, 52, 53, 80)
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54. A multi-stage optical amplifier system, comprising:
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a plurality of transmitters that produce a plurality of WDM wavelengths;
a transmission line, at least a portion of the transmission line having a magnitude of dispersion of at least 5 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths;
a multi-stage optical amplifier including, a Raman amplifier assembly including a serial combination of a distributed Raman amplifier and a discrete Raman amplifier, wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier; and
a plurality of receivers coupled to the multi-stage optical amplifier. - View Dependent Claims (55, 56, 57, 58, 59)
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60. A multi-stage optical amplifier system, comprising:
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a plurality of transmitters that produce a plurality of WDM wavelengths;
a transmission line, at least a portion of the transmission line having a magnitude of dispersion of less than 5 ps/(nm)(km) for at least a portion of the plurality of WDM wavelengths;
a multi-stage optical amplifier including, a Raman amplifier assembly including a serial combination of a distributed Raman amplifier and a discrete Raman amplifier, wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier; and
a plurality of receivers coupled to the multi-stage optical amplifier. - View Dependent Claims (61, 62, 63, 64, 65)
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66. A multi-stage optical amplifier system, comprising:
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a plurality of transmitters that produce a plurality of WDM wavelengths;
a multi-stage optical amplifier including, a Raman amplifier assembly including a gain control device and a serial combination of a distributed Raman amplifier and a discrete Raman amplifier, wherein a majority of the plurality of WDM wavelengths received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier, and wherein all wavelengths amplified by the discrete Raman amplifier are received by the same gain medium within the discrete Raman amplifier; and
a plurality of receivers coupled to the multi-stage optical amplifier. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74, 75)
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81. A method of communicating multiple wavelength signals in a broadband communication system, comprising:
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receiving a plurality of wavelength signals at a Raman amplifier assembly;
amplifying at least a portion of the plurality of wavelength signals to create a plurality of amplified wavelength signals with a Raman amplifier assembly that includes a combination of a distributed Raman amplifier and a discrete Raman amplifier, wherein at least a majority of the plurality of wavelength signals received by each of the distributed Raman amplifier and the discrete Raman amplifier are also received by the other of the distributed Raman amplifier and the discrete Raman amplifier;
at least one of the distributed Raman amplifier and the discrete Raman amplifier includes a dispersion compensating fiber; and
wherein at least a majority of the pump wavelengths that provide gain to at least some of the plurality of wavelength signals in the discrete Raman amplifier are shorter than all of the plurality of wavelength signals amplified by the discrete Raman amplifier. - View Dependent Claims (82, 83)
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Specification