patent number 8,150,227 [Application Number 13/035,733] was granted by the patent office on 2012-04-03 for electrically traceable and identifiable fiber optic cables and connectors. This patent grant is currently assigned to Telescent Inc. Invention is credited to Anhony. optical fiber cablehas been widely used in communication networks, telecommunications, power and other fields due to its advantages such as small size, light weight, anti-electromagnetic interference, low loss, large transmission capacity, long transmission distance and low cost. Each optical unit comprises a plurality of optical fibers. Among all of the optical fibers contained in each optical unit, one optical fiber is a main identification optical fiber, and the. (57) The present invention relates to an optical unit including a tubular member, which accommodates a plurality of optical fibers and whose shape is variable to achieve an optimal space factor, to minimizes optical loss or the deterioration of optical properties when the optical cable is bent or. The present invention generally relates to an optical cable comprising optical fibers identifiable by coloring, to an optical fiber identifiable by coloring, to a method for identifying an optical fiber and to the manufacturing of optical cables comprising identifiable optical fibers.