Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?

Light travels faster in a material with a lower refractive  index. Therefore, light rays that travel a longer distance in a  lower refractive index travel at a greater average velocity. What  effect does this have on multimode graded-index fiber modal  dispersion and bandwidth?
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1 Answer

Answer :

Decreases the time difference between light rays, which reduces  modal dispersion and increases fiber bandwidth.
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