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← TechnologyWhich transmission impairment accelerates when chromatic dispersion reaches design limits in DWDM systems?
A)Four-wave mixing✓
B)Polarization mode dispersion
C)Stimulated Brillouin scattering
D)Self-phase modulation
💡 Explanation
Four-wave mixing increases rapidly with poorly-compensated chromatic dispersion in dense wavelength division multiplexing because higher relative delays initiate nonlinear interactions between channels; therefore, unacceptable crosstalk arises rather than simple pulse distortion or enhanced backscattering.
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