A single fiber optic cable is configured as a multiplexer/demultiplexer
that allows wavelengths to exit the fiber along its length and feed an
optical sensor network in a cost efficient and space efficient manner.
The fiber may be implemented as a multimode optical fiber that includes a
plurality of Fiber Bragg Gratings that are tilted relative to the axis of
the multimode fiber. Each grating is used to reflect multiple wavelengths
of light out of the fiber depending on the diameter and the number of
principal modes of the fiber. The plurality of FBGs allows light at
multiple wavelengths to be extracted from the fiber at multiple locations
along its length. At each location, reflected light at multiple
wavelengths extracted from the multimode fiber may be fed through a
plurality of fiber optic paths to optical sensors banks of optical
sensors.