Optical receiving method utilizing polarization diversity and apparatus for carrying out the same
Method and system for equalizing PMD using incremental delay switching
Method and device for tunable frequency selective filtering of optical signals Patent #: 6671437
AbstractA device for processing a digital signal of an optical transmission system is described. The device comprises: a polarization beam splitter for receiving the signal, a phase shifter for shifting the phase of the signal at the orthogonal output of the polarization beam splitter, and means for combining the signal at the parallel output of the polarization beam splitter and the shifted signal.