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Term:
Fiber Optics  

Definition:

Optical transmission occur over glass or plastic media. Signal source pulsing causes signals to spread out or disperse (blend wavelengths) causing interference with other signals - like headlights from other cars in your eyes. Chromatic Dispersion causes reduced fiber bandwidth as different wavelengths of light traveling at different data speeds through the optical fiber. The amount of dispersion is caused by material dispersion (physical design), waveguide dispersion (single/multi-mode), and profile dispersion (refractive index). In older single mode systems, this was not a problem but in newer DWDM-Dense Wave Division Multiplexing systems this is a major issue. Constructive Interference is interference that increases amplitude of the optical signal. For example, when the wave forms are inphase, they can create a resultant wave equal to the sum of multiple light waves.



Reference to:
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Verizon: Verizon FiOS Delivers a Game-Changing Game Day at Home
11/18/2009




Source:

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