Optical receiving apparatus and characteristic compensation method
AssigneeFujitsu Limited
InventorHiroshi Iizuka
Life of this patent
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Abstract
An optical receiving apparatus includes: a compensator configured to compensate an amount of change in a characteristic; a controller configured to obtain, based on a first amount of change in the characteristic with respect to a first optical signal with a first wavelength, the first wavelength, and a wavelength characteristic in the characteristic, a second amount of change in the characteristic made when a second optical signal with a second wavelength is propagated in an optical path, the second wavelength being different from the first wavelength, and obtain a compensation amount based on the second amount of change; and a first setting unit configured to set the compensation amount for the compensator so that the compensator compensates the amount of change in the characteristic.
Claims14
An optical receiving apparatus comprising:
- a controller configured to obtain, based on a first amount of change in a characteristic with respect to a first optical signal with a first wavelength, the first wavelength, and a wavelength characteristic in the characteristic, a second amount of change in the characteristic made when a second optical signal with a second wavelength is propagated in an optical path, the second wavelength being different from the first wavelength, and to obtain a compensation amount based on the second amount of change;
- a compensator configured to compensate an amount of change in the characteristic in the second optical signal;
- and
- a first setting unit configured to, in accordance with the compensation amount obtained by the controller, set the amount of change in the characteristic in the second optical signal compensated by the compensator.
A characteristic compensation method comprising:
- obtaining, based on a first amount of change in the characteristic with respect to a first optical signal, the first wavelength, and a wavelength characteristic in the characteristic, a second amount of change in the characteristic made when a second optical signal with a second wavelength is propagated in an optical path, the second wavelength being different from a first wavelength,
- obtaining a compensation amount for compensating the second amount of change based on the second amount of change, and
- setting the compensation amount for a compensator that compensates, in the second optical signal, the second amount of change in the characteristic made-when the second optical signal is received.
An apparatus comprising:
- a controller configured to receive information indicating a first wavelength, a second wavelength, an amount of residual dispersion with respect to a first optical signal having the first wavelength and which propagated in an optical path, and a dispersion slope of the optical path, and configured to, based on the received information, determine a residual dispersion of a second optical signal having the second wavelength propagated in an optical path;
- and
- a dispersion compensator to compensate for dispersion in the second optical signal by a dispersion compensation amount,
- wherein the controller sets the dispersion compensation amount of the dispersion compensator based on the determined residual dispersion.
Dependencies are inferred from the claim text.