Abstract- In this paper, different types of line coding techniques used for digital optical fiber communication have been discussed. The two forms of line codes are Unipolar Non-Return Zero line codes and Polar Non-Return Zero. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber. The light is a form of carrier wave that is modulated to carry information. Manchester codes are also. Fiber optic network design refers to the specialized processes leading to a successful installation and operation of a fiber optic network. It includes first determining the type of communication system (s) which will be carried over the network, the geographic layout (premises, campus, outside. A novel coding scheme (DmB1M) proposed by Japanese researchers is analysed and compared with other coding techniques commonly adopted for optical communications. Optical fiber wave guides- Introduction, Ray theory t ansmission, Total Interna ERS: Attenuation, Absorption, Scattering and Bending losses, Core and Cladding losses. Information capacity determination, Group.
