Comparative investigation of group velocity dispersion with nonlinear phase modulation in fiber optic WDM transmission

Abstract

WDM system transmission efficiency is deteriorated by the combined influence of cross phase modulation (XPM) and group velocity dispersion (GVD) of first and second order. This degradation occurs as the channel bulk, light intensity, speed of transmission, and wavelength count frequencies increase. Analysis of the pulse broadening factor, standardized outturn, and resolving the nonlinear Schrödinger equation (NLSE) is conducted in this study. The influence of XPM on higher order GVD is reflected. The impact of broadcast limit and different absorbed powers (10 mW to 120 mW) at various transmission speeds (10 Gbps and 40 Gbps) are assessed utilizing large effective area fiber (LEAF) and standard single mode fiber (SSMF). The first- and second order GVD XPM impacts are the only ones that influence emitted oscillation. GVD's second-order consequences are not perceptible at close grips (⁓10 km) and low throughput (10 Gbps) but become perceptible and affect system performance at bit rates of 40 Gbps and above. The study found that transmission rate and fiber span have a stronger impression on duration than input dominance. The SSMF and LEAF consequences are obtained by rigorous derivation and numerical simulation at the consistent throughput and absorbed power managing the split-phase Fourier method. XPM has a stronger optimistic impact on GVD in SSMF fibers than LEAF fibers by 2 km. Due to their ability to quantify the degree of performance degradation emanating from XPM effects with first- and second order GVD, the findings of this work may prove useful in the design of high-speed, long-distance WDM fiber-optic transmission links.