Simulating Self-Phase Modulation Curves in Optical Fiber Nonlinear Effects

This simulation utilizes MATLAB to investigate nonlinear effects in optical fibers, focusing specifically on self-phase modulation curves. The implementation involves adjusting various parameter values to observe the impact of self-phase modulation and analyze its effects on optical fiber transmission performance. Through such simulation studies, we can better understand nonlinear phenomena in fibers and provide valuable references for designing and optimizing fiber optic communication systems. Key implementation aspects include using MATLAB's numerical solving capabilities to model the nonlinear Schrödinger equation, where the nonlinear parameter gamma and input power can be varied to generate different SPM curves. The code typically involves split-step Fourier methods for solving the propagation equation, with functions for calculating phase shift accumulation and spectral broadening effects. Parameter sweeps allow systematic observation of how input power levels and fiber lengths affect the resulting phase modulation characteristics.