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← ScienceWhich mechanism diminishes signal resolution in optical fiber?
A)Chromatic dispersion broadens the pulses✓
B)Increased Fresnel reflection appears
C)Raman scattering shifts frequency
D)Electromagnetic interference induces jitter
💡 Explanation
Chromatic dispersion causes pulse broadening because different wavelengths travel at slightly different speeds along the fiber; therefore, the pulse spreads rather than remaining sharp, because modal dispersion is less considerable in single-mode fibers.
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