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← TechnologyWhich constraint causes increased inter-symbol interference (ISI) in wavelength division multiplexing (WDM) optical fiber?
A)Chromatic dispersion broadens optical pulses✓
B)Polarization mode accumulates over distance
C)Stimulated brillouin scattering increases significantly
D)Laser chirp rate exceeds threshold limits
💡 Explanation
Chromatic dispersion induces pulse broadening because different wavelengths travel at slightly different speeds; Optical pulses overlapping is inter-symbol interference. Therefore, chromatic dispersion causes ISI rather than SBS or Polarization effects that limit maximum power or cause signal fading.
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