Polarization diversity receiver for optical transmission system

Details Polarization diversity receiver for optical transmission system Polarization diversity receiver for optical transmission system

2007-04-24

2007-04-24

Pascal, Leslie (Department: 2613)

Optical communications

Receiver

Heterodyne

C398S212000

Reexamination Certificate

active

10425810

ABSTRACT:
A polarization diversity receiver has an optical section for converting the received optical signal into four or five polarization diverse component optical signals that substantially represent amplitude and polarization state information of the received optical signal, by respective polarization transformations to respective points on a Poincaré sphere, the points being equally spaced apart to maximize polarization diversity, even in the worst case input polarization state. Detectors produce component electrical signals from each of the component optical signals, for electronic processing to compensate for PMD. By reducing the number of component optical signals significant cost and size reductions are enabled. The need for precise polarization tracking in the receiver can be reduced or eliminated completely. Balanced detectors can be used to reduce the number of electrical signals. The electrical processing can use sequence detection.

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