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Professor Guifang Li is awarded three patents

Professor Guifang Li, along with members of his Optical Fiber Communications group, were awarded three patents:

US 8,447,191: Compensation of optical transmission impairments using digital backward propagation

Systems and method of compensating for transmission impairment are disclosed. One such method comprises receiving a wavelength-division multiplexed optical signal. The received optical signal has been distorted in the physical domain by an optical transmission channel. The method further comprises propagating the distorted optical signal backward in the electronic domain in a corresponding virtual optical transmission channel. The backward propagation fully compensates for fiber dispersion, self-phase modulation, and cross-phase modulation (XPM) and partially compensates for four-wave mixing (FWM).


US 8,437,643: Compensation of transmission impairments in polarization multiplexed systems

Systems and methods of compensating for transmission impairment are disclosed. One such method includes receiving a polarization-division multiplexed optical signal which has been distorted in the physical domain by an optical transmission channel, and propagating the distorted polarization-division multiplexed optical signal backward in the electronic domain in a corresponding virtual optical transmission channel.


US 8,452,191: Electronic compensation of nonlinear effects of semiconductor optical amplifiers

Systems and methods are disclosed for compensating for impairments caused by a semiconductor optical amplifier (SOA). One such method comprises receiving an optical signal which has been distorted in the physical domain by an SOA, and propagating the distorted optical signal backward in the electronic domain in a corresponding virtual SOA.

Posted Tuesday, July 9, 2013

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