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US 9,002,211 B2Granted
Communication system, dispersion slope imparting section, and method for communicating
AssigneeFujitsu Limited
InventorHiroshi Nakamoto
Life of this patent
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Abstract
A communication system includes a transmission path through which an optical signal is propagated; and dispersion slope imparting sections provided on a transmitting side and a receiving side of the transmission path, the dispersion slope imparting sections imparting different dispersion and dispersion slope characteristics in accordance with a wavelength band of the optical signal, wherein the dispersion and dispersion slope characteristics imparted by the dispersion slope imparting section on the transmitting side is different from those on the receiving side.
Claims6
A communication system comprising:
- a transmission path through which an optical signal is propagated;
- and
- dispersion slope imparting sections provided on a transmitting side and a receiving side of the transmission path, the dispersion slope imparting sections imparting different dispersion and dispersion slope characteristics in accordance with a wavelength of the optical signal such that the dispersion and dispersion slope characteristics are compensated in total across the transmission path,
- wherein the dispersion and dispersion slope characteristics imparted by the dispersion slope imparting section on the transmitting side are different from those on the receiving side, and
- the dispersion and dispersion slope characteristics imparted by the dispersion slope imparting section on the transmitting side to a wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a shorter wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region, and the dispersion and dispersion slope characteristics imparted by the dispersion slope imparting section on the receiving side to the wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a longer wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region.
2 more elements
A dispersion slope imparting section provided on a transmitting side of a transmission path, through which an optical signal is propagated, the dispersion slope imparting section comprising:
- a slope imparting device that imparts dispersion and dispersion slope characteristics in accordance with a wavelength band of the optical signal such that the dispersion and dispersion slope characteristics are compensated in total across the transmission path,
- wherein the dispersion and dispersion slope characteristics imparted by the slope imparting device on the transmitting side are different from those on a receiving side of the transmission path, and
- the dispersion and dispersion slope characteristics imparted by the slope imparting device on the transmitting side to a wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a shorter wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region, and the dispersion and dispersion slope characteristics imparted on the receiving side to the wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a longer wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region.
A method for communicating an optical signal through a transmission path, the method comprising:
- imparting different dispersion and dispersion slope characteristics in accordance with a wavelength band of the optical signal such that the dispersion and dispersion slope characteristics are compensated in total across the transmission path, on a transmitting side and a receiving side of the transmission path,
- wherein the dispersion and dispersion slope characteristics imparted on the transmitting side are different from those on the receiving side, and
- the dispersion and dispersion slope characteristics imparted on the transmitting side to a wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a shorter wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region, and the dispersion and dispersion slope characteristics imparted on the receiving side to the wavelength division multiplexed optical signal in a short wavelength region have a comparable value of the dispersion slope but the wavelength providing a zero dispersion is shifted to a longer wavelength side, as compared to those imparted to the wavelength division multiplexed optical signal in a long wavelength region.
Dependencies are inferred from the claim text.