PDL (Polarization-dependent loss) is a physical impairment in optical fiber networks in which signal attenuation varies with the polarization state of light, degrading the signal-to-noise ratio (SNR) and reducing transmission reliability. PDL accumulates across cascaded optical components such as amplifiers, filters, and connectors. Accurate statistical modeling of PDL effects is essential for quality of transmission assessment, margin-aware network design, and the planning of reliable high-capacity optical communication systems.
We develop closed-form formulas for PDL-induced SNR margins using solutions based on central limit theorem. Experimental validations confirm accurate and conservative performancepredictions, enabling precise quality of transmission assessment and margin-aware design in optical networks.
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