Question

What is the effect of chromatic dispersion in optical fibers?

    a.   Chromatic dispersion means that the optical pulses spread out as they propagate. It is useful, because it makes it easier to locate the pulse.

    b.   Chromatic dispersion means that the optical pulses spread out as they propagate. It is harmful, as it makes the pulses overlap, limiting the achivable data rate.

    c.   Chromatic dispersion means that the optical pulses lose energy as they propagate. It is harmful, as it makes frequent amplification necessary.

    d.   Chromatic dispersion means that the optical pulses can have a diversity of forms and shapes. It is useful, as we may carry more information encoded into the shape of the pulse.

Answer 1

solution:

Chromatic Dispersion can be stated as the time domain spreasing or broadening of the transmission signal light pulses as they travel through the fibre which causes the pulse broadening means pulse spreads out as they propagate and bit error means due to pulse broadening its hard to distinguish between different pulses/signals.

Hence option (b) is correct ( Chromatic dispersion means that the optical pulses spread out as they propagate. It is harmful, as it makes the pulses overlap, limiting the achivable data rate.)

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