Optical devices are disclosed, one example of which includes first and
second polarization maintaining ("PM") fibers. The first and second PM
fibers in this example are disposed beside each other to form a grouping
that includes a secondary axis defined by the first and second PM fibers.
The first and second PM fibers are oriented such that a fast axis of the
first PM fiber is non-parallel with respect to a fast axis of the second
PM fiber. Finally, the optical device is configured so that each of the
PM fibers maintains a distinct optical transmission path.