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← ScienceWhich effect reduces signal quality when transmitting light through a 5km length of conventional single-mode fiber?
A)Modal dispersion broadens pulse widths✓
B)Increased reflection decreases intensity
C)Chromatic aberration reduces bandwidth
D)Stimulated emission boosts power
💡 Explanation
Modal dispersion limits data rates in single-mode fiber, because slight imperfections cause different propagation modes, and therefore the pulse broadens; stimulated emission would amplify the signal strength, rather than decrease quality as in pulse broadening.
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