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← ScienceWhich phenomenon reduces signal strength in fiber optics?
A)Rayleigh scattering from index deviations✓
B)Chromatic dispersion profile broadening
C)Polarization mode group dispersion
D)Stimulated Raman scattering amplification
💡 Explanation
Rayleigh scattering weakens the signal because microscopic density and composition fluctuations cause elastic scattering. This scattering redirects some light out of the guided mode; therefore attenuation increases due to this incoherent loss, rather than amplification from Raman scattering.
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