We define the 4 major components of a fiber optic patch cord consisting of the jacket, aramind strength members, buffer coating and optic fibers. Fiber Optic Cable Light is an electromagnetic wave. The wavelength range of visible light is: 390~760nm (nanometer), greater than the 760nm part is infrared light, and the part smaller. A fiber optic patch cable (also called a fiber jumper or fiber patch cord) is a section of optical fiber cable with connector terminations on both ends, designed for flexible, short-distance interconnections within an optical network. Understanding the various technical.