Which phenomenon causes signal attenuation in long undersea fiber optic cables that span thousands of kilometers?

💡 Explanation

When intense light travels long distances underwater, stimulated Raman scattering (SRS) occurs because photons transfer energy nonlinearly to lower frequencies, causing power loss in the primary signal band via optical phonons generated in silica; therefore, Raman scattering accumulating non-linearly results, rather than dispersion which requires spectral dependence, water absorption demanding different wavelengths, or polarization mode dispersion depending on waveguide imperfections.

• Which outcome occurs when injected dye within the gain medium of the dye laser strongly absorbs light at the lasing wavelength?
• Which process limits overall efficiency when heat engine’s hot reservoir approaches absolute zero in a Carnot cycle?
• Which risk increases when molten salt reactors lack isotope control?
• Which consequence results when atmospheric humidity drastically increases around NaCl road salt?
• Which effect typically occurs when a microwave signal encounters a narrow waveguide below its cutoff frequency?
• Which consequence results when interstitial carbon atoms distort iron's lattice?