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← ScienceWhich mechanism causes modulation instability to disrupt optical signals?
A)Self-phase modulation enhances frequency deviations✓
B)Chromatic dispersion minimizes spectral broadening
C)Polarization mode dispersion reduces pulse walk-off
D)Stimulated Raman scattering shifts wavelengths uniformly
💡 Explanation
Self-phase modulation introduces intensity-dependent phase changes, therefore the refractive index varies, leading to constructive interference and breakup rather than stable pulse propagation, because chromatic dispersion is overwhelmed.
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