Within a fiber optic network, which impairment increases when chromatic dispersion isn't compensated in WDM?

💡 Explanation

Chromatic dispersion causes different wavelengths to travel at different speeds, leading to pulse broadening. This pulse broadening results in increased Inter-symbol interference (ISI) because the dispersed pulses overlap. Therefore, ISI increases rather than noise or laser instability, as chromatic effects dominate.

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