Optical receiver, optical transmitter, and optical reception method
AssigneeNEC Corporation
InventorYasushi Hara
Life of this patent
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Abstract
In order to detect occurrence of an influence on quality of an optical signal due to a non-linear effect of an optical fiber, an optical receiver includes: a demodulation unit that demodulates a received optical signal and outputs a reception signal, and calculates a quality value indicating quality of the optical signal; an extraction unit that extracts, from the reception signal, transmission power being a value indicating optical power at a time of transmitting the optical signal; an arithmetic unit that determines a change rate of the quality value to the transmission power; and a monitoring unit that determines, based on a comparison result between the change rate and a predetermined threshold, an influence of a non-linear effect in the optical signal.
Claims12
An optical receiver comprising:
- a demodulation unit configured to demodulate an optical signal, output a reception signal, and calculate quality values each indicating a quality for each of optical signals having different transmission powers;
- an extracting unit configured to extract, from the reception signal demodulated from the optical signal, transmission powers being values each indicating an optical power at a time of transmitting the optical signal at different transmission powers;
- an arithmetic unit configured to determine a change rate of the quality values to the transmission powers;
- and
- a monitoring unit configured to determine, based on a comparison result between the change rate and a predetermined threshold, an influence of a non-linear effect in the optical signal.
An optical reception method comprising:
- demodulating an optical signal, output a reception signal, and calculate quality values each indicating a quality for each of optical signals having different transmission powers;
- extracting, from the reception signal demodulated from the optical signal, transmission powers being values each indicating an optical power at a time of transmitting the optical signal at different transmission powers;
- determining a change rate of the quality values to the transmission powers;
- and
- determining, based on a comparison result between the change rate and a predetermined threshold, an influence of a non-linear effect in the optical signal.
Dependencies are inferred from the claim text.