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Fibre Optics (Distortion (Dispersion is a phenomenon related to the…
Fibre Optics
Distortion
Dispersion is a phenomenon related to the variation in velocity of different frequencies (wavelengths) or different modes.
As the pulses travel on the fiber due to broadening, slowly they start overlapping with each other.
Intra-modal or Chromatic dispersion (present in single mode an multimode optical fiber). This dispersion is due to finite bandwidth of the signal
Material dispersion: This is due to intrinsic properties of the material, glass
Waveguide dispersion: This is due dispersive nature of the bound medium. In a bound medium like the optical fiber, the velocity is a function of frequency.
Inter-modal dispersion (present in only multimode optical fiber). This dispersion is due to change in velocity from one mode to other.
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Attenuation
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Attenuation is caused by passive media components, such as cables, cable splices, and connectors.
