Which risk increases significantly when Wavelength Division Multiplexing (WDM) amplifiers in long-haul fiber optic systems experience uneven gain across different wavelengths?

💡 Explanation

Inter-channel crosstalk increases due to signal power imbalances from wavelength-dependent gain; mode coupling causes power leakage. This occurs because uneven amplification alters initial power ratios, therefore strong wavelengths bleed power into weaker ones, degrading channel separation rather than maintaining uniform amplification.

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