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How Does An Optical Fiber Transmit Light?

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Optical fiber transmits light by a principle called total internal reflection. The light in a fiber optic cable travels through the cove by constantly bouncing from the cladding. Because the cladding does not absorb any light from the core, the light wave can travel great distances. However, some of the light signal degrades within the fiber, mostly due to impurities in the glass. The extent that the signal degrades depends on the purity of the glass and the wavelength of the transmitted light.



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