Systems and methods for phase compensation
AssigneeCable Television Laboratories, Inc.
InventorsJunwen Zhang, Mu Xu, Haipeng Zhang, Zhensheng Jia, Luis Alberto Campos
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Abstract
A method for phase compensation in an optical communication network includes (1) modifying a modulated signal according to one or more correction factors to generate a compensated signal, to compensate for phase rotation, (2) modulating a magnitude of an optical signal in response to a magnitude of the compensated signal, and (3) modulating a phase of the optical signal, after modulating the magnitude of the optical signal, in response to a phase of the compensated signal.
Claims20
A method for phase compensation in an optical communication network, the method comprising:
- generating a compensated signal by modifying a modulated signal by one or more correction factors, to compensate for variation in phase of an optical signal within the optical communication network;
- separating the compensated signal into an amplitude signal and a phase signal;
- controlling a laser to modulate a magnitude of the optical signal in response to the amplitude signal;
- and
- modulating the phase of the optical signal, after modulating the magnitude of the optical signal, in response to the phase signal.
A transmitter system configured to perform phase compensation, comprising:
- a laser configured to modulate an amplitude of an optical signal in response to a magnitude of a compensated signal;
- a phase modulator disposed downstream of the laser with respect to the optical signal, the phase modulator being configured to modulate a phase of the optical signal in response to a phase of the compensated signal;
- and
- a phase correction module configured to generate the compensated signal to compensate for variation in phase of the optical signal caused at least partially by controlling the laser to modulate the magnitude of the optical signal.
Dependencies are inferred from the claim text.