fiber optics is the latest in transmission of data. With the use of fiber optic techonoly a large amount of data can be transferred. The connventional copper cables are now being replaced with fiber optic cable for the same reason. Some of the terms are defined below.

By defination fiber optics is defined as the use of thin flexible transparent fibers to transmit light signals, used for telecommunicaions or for internatal inspection of the body.

fiber Grating: An optical fiber in which the refractive index of the core varies periodically along its length, scattering light in a way similar to a diffraction grating, and transmitting or reflecting certain wavelengths selectively.

fiber-in-the-loop (FITL): fiber optic service to a node that is located in a neighborhood.

fiber Optic Attenuator: A component installed in a fiber optic transmission system that reduces the power in the optical signal. It is often used to limit the optical power received by the photodetector to within the limits of the optical receiver. A fiber optic attenuator may be an external device, separate from the receiver, or incorporated into the receiver design as illustrated

fiber Optic Cable: A cable containing one or more optical fibers.

fiber Optic Communication System: The transfer of modulated or unmodulated optical energy through optical fiber media which terminates in the same or different media.

fiber Optic Subsystem: A functional entity with defined bounds and interfaces which is part of a system. It contains solid state and/or other components and is specified as a subsystem for the purpose of trade and commerce.