Page 26 - Flipped book_fiber optics
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Modal Dispersion / Intermodal Dispersion
Spreading of a pulse because different modes (paths) through the
fiber take different times, i.e. light rays travelling in each mode will
travel a different distance they will arrive at the output at different
times.
Only happens in multimode fibre ; limits its performance
As length fibre increase, modal dispersion increase
Will be reduced with graded-index fibre .
