A fiber optic ribbon includes a plurality of optical fibers arranged in a
generally planar configuration having a primary matrix generally
contacting optical fibers along a longitudinal axis forming an elongate
structure. In one embodiment, the primary matrix has a cross-section with
a non-uniform thickness, for example, an end portion with a generally
bulbous shape. The fiber optic ribbon is useful as a subunit having a
secondary matrix in contact therewith. The secondary matrix has a
non-uniform thickness, thereby providing a fiber optic ribbon with
preferential tear portions to aid separation of the ribbon into subunits.
Other embodiments include a fiber optic ribbon with subunits having a
secondary matrix with recessed portions to aid in the separation of the
subunits.
