A PMD device includes a first stage that receives a signal and performs rotation
about {1,0,0} on the signal. The first stage outputs a first signal. A second stage
receives the first signal and performs a rotation about {0,0,1} on the first signal.
The second stage outputs a second signal that represents the alignment the PMD
of various frequencies into a common direction. A third stage receives the second
signal and provides the necessary frequency dependent variable in the {1,0,0} direction
to cancel the PMD in any specified frequency range.