Optical waveguides – Polarization without modulation
Reexamination Certificate
2006-04-18
2006-04-18
Healy, Brian M. (Department: 2883)
Optical waveguides
Polarization without modulation
C385S027000, C385S028000, C385S123000, C385S031000, C398S065000, C398S081000
Reexamination Certificate
active
07031559
ABSTRACT:
A technique for PMD mitigation in an optical communications system that utilizes a plurality of polarization rotators in an optical fiber to continuously rotate the polarization state of at least one optical signal that propagates through the fiber. The optical fiber is segregated into a plurality of sections and the polarization rotators are disposed between adjacent sections of the fiber. The polarization state of at least one optical signal received from the first of a pair of adjacent sections is continuously rotated by the polarization rotator prior to being transmitted to the second of the pair of adjacent sections. The rotated optical signals are collected at a receiver and corrected for errors using, for example, forward error correction.
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Frigo Nicholas J.
Magill Peter D
AT&T Corp.
Healy Brian M.
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