Which error propagation risk increases significantly when applying wavelength-division multiplexing (WDM) on long-haul fiber optic communication links?

💡 Explanation

Four-wave mixing creates additional optical frequencies from existing channels, increasing crosstalk because the nonlinear optical effect causes wavelengths to interfere, potentially corrupting adjacent channels. Therefore, signal integrity degrades rather than only polarization or chromatic dispersion which affect pulse shape.

• Which risk increases when a hydraulic actuator operates at a cycling frequency near its hydraulic resonance?
• Which risk increases significantly when Wavelength Division Multiplexing (WDM) amplifiers in long-haul fiber optic systems experience uneven gain across different wavelengths?
• Which unstable effect results when an aircraft aileron jams during high-speed flight?
• Which accuracy risk increases when asynchronous sensor data streams are combined in a Kalman filter?
• Which mechanism reduces a progressing cavity pump's efficiency during hydraulic fracturing when pumping abrasive proppant slurry?
• Which failure occurs more readily when piston quench height increases?