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Which risk increases when pulse width decreases in optical fiber?

A)Increased signal degradation from dispersion
B)Higher stimulated Raman threshold power
C)Reduced nonlinear refractive index effects
D)Lower four-wave mixing interaction length

💡 Explanation

Decreasing pulse width increases bandwidth, which causes increased degradation from chromatic dispersion, because the different wavelengths composing the pulse will propagate at slightly different speeds. Therefore dispersion effects are amplified, rather than effects like self-phase modulation because pulse energy remains low.

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