Broadband amplifier and communication system
First Claim
Patent Images
1. A method of broadband amplification, comprising:
- dividing an optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam, the Raman amplifier assembly including a dispersion compensating fiber with at least a portion of the dispersion compensating fiber having a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the the optical signal;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams.
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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.
153 Citations
80 Claims
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1. A method of broadband amplification, comprising:
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dividing an optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam, the Raman amplifier assembly including a dispersion compensating fiber with at least a portion of the dispersion compensating fiber having a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the the optical signal;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of broadband amplification, comprising:
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communicating an optical signal along 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 optical signal;
dividing the optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam, wherein at least a portion of a gain medium of the Raman amplifier assembly comprises a dispersion compensating fiber;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams, wherein the Raman amplifier assembly and the at least one rare earth doped fiber amplifier at least partially compensate for losses suffered by the optical signal in the transmission line. - View Dependent Claims (13, 14, 15, 16, 17, 62, 63)
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18. The method of broadband amplification, comprising:
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communicating an optical signal along 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 optical signal;
dividing the optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam, wherein at least a portion of a gain medium of the Ramna amplifier assembly comprises a dispersion compensating fiber;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams, wherein the Raman amplifier assembly and the at least one rare earth doped fiber amplifier at least partially compensate for losses suffered by the optical signal in the transmission line. - View Dependent Claims (19, 20, 21, 22, 23, 64, 65)
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24. A method of broadband amplification, comprising:
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communicating an optical signal along a transmission line, a first portion of the transmission line having a positive sign of dispersion and a second portion of the transmission line having a negative sign of dispersion for at least a portion of the optical signal, wherein at least a portion of the transmission line provides a global dispersion of 1 ps/(nm)(km) or less for at least a portion of the optical signal;
dividing the optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams, wherein the Raman amplifier assembly and the at least one rare earth doped fiber amplifier at least partially compensate for losses suffered by the optical signal in the transmission line. - View Dependent Claims (25)
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26. A method of transmitting WDM wavelengths in a broadband communication system, comprising:
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propagating a first plurality of WDM wavelengths along a transmission line, at least a portion of first plurality of WDM wavelengths being in the wavelength range of range of 1530 to 1620 nm;
introducing a second plurality of WDM wavelengths to the transmission line, at least a portion of the second plurality of WDM being in the wavelength range of 1430 to 1530 nm;
amplifying at least a portion of the WDM wavelengths by Raman amplification in a Raman amplifier assembly that includes a dispersion compensating fiber with at least a portion of the dispersion compensating fiber having a magnitude of dispersion of at least 50 ps/(nm)(km) for at least a portion of the WDM wavelengths; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of transmitting WDM wavelengths in a broadband communication system comprising:
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propagating a first plurality of WDM wavelengths along 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 WDM wavelengths, at least a portion of the first plurality of WDM wavelengths being in the wavelength range of 1530 to 1620 nm;
introducing a second plurality of WDM wavelengths to the transmission line, at least a portion of the second plurality of WDM wavelengths being in the wavelength range of 1430 to 1530 nm;
amplifying at least a portion of at least the second plurality of WDM wavelengths by Raman amplification in a Raman amplifier assembly, wherein at least a portion of a gain medium of the Raman amplifier assembly comprises a dispersion compensating fiber; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (36, 37, 38, 39, 40, 66, 67, 68)
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41. A mehtod of transmitting WDM wavelengths in a broadband communicating system, comprising:
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propagating a first plurality of WDM wavelengths along 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 WDM wavelengths, at least a portion of the first plurality of WDM wavelengths being in the wavelength range of 1530 to 1620 nm;
introducing a second plurality of WDM wavelengths to the transmission line, at least a portion of the second plurality of WDM wavelengths being in the wavelength range of 1430 to 1530 nm;
amplifying at least a portion of at least the second plurality of the WDM wavelengths by Raman amplification in a Raman amplifier assembly, wherein at least a portion of a gain medium of the Raman amplifier assembly comprises a dispersion compensating fiber; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (42, 43, 44, 45, 46)
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47. A method of tranmitting WDM wavelengths in a broadband communication system, comprising:
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propagating a first plurality of WDM wavelengths along a transmission line, at least a portion of the first plurality of WDM wavelength range of 1530 to 1620 nm;
introducing a second plurality of WDM wavelengths to the transmission line carrying the first plurality of WDM wavelengths, at least a portion of the second plurality of WDM wavelengths being in the wavelength range of 1430 to 1530 nm, wherein a first portion of the transmission line has a positive sign of dispersion and a second portion of the transmission line has a negative sign of dispersion for at least a portion of the WDM wavelengths, wherein at least a portion of the transmission line provides a global dispersion of 1 ps/(nm)(km) or less for at least a portion of the optical signal;
amplifying at least a portion of at least the second plurality of the WDM wavelengths by Raman amplification in a Raman amplifier assembly; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A method of broadband amplification, comprising:
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communicating an optical signal over a transmission line, at least a portion of the transmission line having a magnitude of dispersion of at least 10 ps/(nm)(km) for at least a portion of the optical signal;
dividing the optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams, wherein the Raman amplifier assembly and the at least one rare earth doped fiber amplifier at least partially compensate for losses suffered by the optical signal in the transmission line. - View Dependent Claims (69, 70, 71)
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59. A method of broadband amplification, comprising:
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communicating an optical signal over a transmission line, at least a portion of the transmission line having a magnitude of dispersion of less than 1 ps.(nm)(km) for at least a portion of the optical signal;
dividing the optical signal into a first beam and a second beam at a preselected wavelength, at least a portion of the optical signal having a wavelength of 1430 nm to 1620 nm;
directing the first beam to a Raman amplifier assembly to produce an amplified first beam;
directing the second beam to at least one rare earth doped fiber amplifier to produce an amplified second beam; and
combining the first and second amplified beams, wherein the Raman amplifier assembly and the at least one rare earth doped fiber amplifier at least partially compensate for losses suffered by the optical in the transmission line. - View Dependent Claims (72, 73, 74)
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60. A method of transmitting WDM wavelengths in a broadband communication system, comprising:
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propagating a first plurality of WDM wavelengths along a transmission line having a magnitude of dispersion of at least 10 ps/(nm)(km) for at least a portion of the WDM wavelengths, at least a portion of the first pluraltiy of WDM wavelengths being in the wavelength range of 1530 to 1620 nm;
introducing a second pluraltiy of WDM wavelengths to the transmission line carrying the first plurality of WDM wavelengths, at least a portion of the second plurality of WDM wavelengths being in the wavelength range of 1430 to 1530 nm;
amplifying at least a portion of at least the second plurality of the WDM wavelengths by Raman amplification in a Raman amplifier assembly; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (75, 76, 77)
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61. A method of transmitting WDM wavelengths in a broadband communication system, comprising;
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propagating a first plurality of WDM wavelengths along a transmission line having a magnitude of dispersion of less than 1 ps/(nm)(km) for at least a portion of the WDM wavelengths, at least a portion of the first plurality of WDM wavelengths being in the wavelength range of 1530 to 1620 nm;
introducing a second plurality of WDM wavelengths to the transmission line carrying the first plurality of WDM wavelengths, at least a portion of the second plurality of WDM wavelengths being in the wavelength range of 1430 to 1530 nm;
amplifying at least a portion of at least the second plurality of the WDM wavelengths by Raman amplification in a Raman amplifier assembly; and
receiving the first and second pluralities of WDM wavelengths at a receiver assembly. - View Dependent Claims (78, 79, 80)
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Specification