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The lack of regeneration in all optical networks makes the data susceptible to network malfunctions, misconfigurations and signal impairments. As most of the effects are additive in nature, the signal quality is degraded by the time it reaches at the destination end making optical monitors installation a need of the day to maintain the service-level agreements for the end users. The physical layer impairments that need to be monitored are broadly classified as linear and nonlinear impairments. As the nonlinear impairments depends on the network state, it is difficult to preestimate them, while linear impairments can be easily determined from the type of fiber, wavelength/waveband, amplifier and environmental conditions. Among the linear impairments, dispersion, amplified spontaneous emission noise and attenuation are more dominating. In the present work, an effort is given to study the impact of dispersion on system quality, quantified through bit error rate (BER) and  Q -value. Eye diagrams obtained at the receiver end are used for calculating system response. The curves obtained for BER and  Q -value are further processed for curve fitting and suitable fifth-order polynomial equation is calculated representing the system response. Implementation of this equation in routing applications is discussed.

A Unified Approach for Calculating Error Rates of 10 Gbps WDM Network in Presence of Higher Order Dispersion