Question:

A multimode graded index fibre exhibits total pulse broadening of $0.1\, \mu s$ over a distance of $1.5\, km$. What is the maximum possible band width on the link assuming no inter symbol interference?

Updated On: Jul 5, 2022
  • $10 \,MHz$
  • $7.5\, MHz$
  • $5 \,MHz$
  • $2.5 \,MHz$
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The Correct Option is C

Solution and Explanation

The maximum possible optical band width is equivalent to the maximum possible bit rate (for return to zero pulses). It is given by $B_{T} = \frac{1}{2\tau } = \frac{1}{2\times0.1\times 10^{-6}} = 5\,MHz$
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