Optical communication system, transmission deterioration compensation method, optical transmission system, and optical receiver system
AssigneeFujitsu Limited
InventorFutoshi Izumi
Life of this patent
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Abstract
In an optical communication system, a pre-compensation is conducted for an influence of a polarization dispersion and a polarization dependent loss, which an optical signal transmitted from a transmitter station to a receiver station receives from a communication channel, at a transmitter station. The influence of the polarization dispersion and the polarization dependent loss from the transmission channel is cancelled when the receiver station receives the optical signal.
Claims11
An optical communication system wherein:
- a pre-compensation is conducted for an influence of a polarization dispersion and a polarization dependent loss, which an optical signal transmitted from a transmitter station to a receiver station receives from a communication channel, at the transmitter station;
- and
- the influence of the polarization dispersion and the polarization dependent loss from the transmission channel is cancelled when the receiver station receives the optical signal.
A transmission deterioration compensation method, comprising the steps of:
- conducting a pre-compensation for an influence of a polarization dispersion and a polarization dependent loss, which an optical signal transmitted from a transmitter station to a receiver station receives from a communication channel, at the transmitter station;
- receiving the influence of the polarization dispersion and the polarization dependent loss, which the optical signal transmitted from the transmitter station to the receiver station receives from the transmission channel;
- and
- receiving an optical signal in which the influence of the polarization dispersion and the polarization dependent loss from the transmission channel is cancelled.
An optical transmitting system for transmitting an optical signal to a receiver station, comprising:
- an output part for modulating light transmitted from the receiver station with a modulation signal;
- and
- a transmitting part for rotating a polarized wave of the optical signal at 90 degrees, and transmitting the optical signal to the receiver station.
An optical receiving system for receiving an optical signal from a transmitter station, comprising:
- a separating part for separating light from a light source into two polarizations;
- an adjusting part for separately adjusting levels of the two polarizations;
- and
- a transmitting part for multiplexing the two polarizations as a multiplexed optical signal after the levels are adjusted, and transmitting the multiplexed optical signal.
Dependencies are inferred from the claim text.