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← TechnologyWhich limit causes increased crosstalk impairment when multi-mode fiber optic cables transmit at higher bandwidth using wavelength division multiplexing (WDM)?
A)Modal dispersion characteristics✓
B)Chromatic dispersion coefficient
C)Fiber nonlinear refractive index
D)Polarization mode instability
💡 Explanation
Increased modal dispersion degrades signal separation because, as adjacent wavelengths overlap, there's greater modal interference, limiting channels; therefore crosstalk increases, rather than being due to fiber nonlinearities which dominate at much higher powers.
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