Systems and methods for polarization mode dispersion mitigation

Details Systems and methods for polarization mode dispersion mitigation Systems and methods for polarization mode dispersion mitigation

2006-10-24

2008-11-18

Kim, Ellen (Department: 2874)

Optical waveguides

Polarization without modulation

Reexamination Certificate

active

07454092

ABSTRACT:
In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency (or half of that frequency) while varying a polarization of the optical signal between a first state of polarization and a second state of polarization, and using the relative change in spectral intensity of the optical signal to determine and correct the DGD of the optical line. Another method comprises splitting an optical signal traveling through the optical line into a first and second portions having a first and second principal states of polarization of the optical line, converting the first and second portions into a first and second electrical signals, delaying the second electrical signal to create a delayed electrical signal that compensates for a DGD of the optical line, and combining the delayed electrical signal with the first electrical signal to produce a fixed output electrical signal.

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U.S. Appl. No. 11/585,659, entitled “Optical Transponders With Reduced Sensitivity to Polarization Mode Dispersion (PMD) and Chromatic Dispersion (CD),” filed Oct. 24, 2006.
European Search Report issued for European Patent Application No. 07254201.2; Dated: Feb. 20, 2008; 6 Pages.

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