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← ScienceWhich outcome occurs when destructive interference degrades coherence length in single-mode fiber?
A)Increased bit error rate✓
B)Enhanced signal-to-noise ratio
C)Refractive index enhancement
D)Reduced pulse dispersion
💡 Explanation
Increased bit error rate occurs because temporal pulse broadening induced by chromatic dispersion increasingly cancels optical signals. Reduced coherence impairs constructive interference, therefore the signal gets destructively interfered with, rather than maintained, causing errors.
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