Definition of - Optical Fibers

Optical Fibers
Typical optical fibers are composed of core, cladding and buffer coating. The core is the inner part of the fiber, which guides light. The cladding surrounds the core completely. The refractive index of the core is higher than that of the cladding, so light in the core that strikes the boundary with the cladding at an angle shallower than critical angle will be reflected back into the core by total internal reflection.
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