Study on the time-frequency splitting mechanism of Pearcey-Gaussian pulses in optical fibers with Raman effect

Abstract

In fiber optic communication systems, an in-depth understanding of the pulse splitting mechanism is crucial for optimizing signal propagation and developing efficient optical devices. In particular, when the Raman effect is considered, tuning the pulse time-frequency splitting mechanism becomes critical for enhancing the signal quality in long-distance propagation systems. This paper systematically investigates the influ-ence of the Raman effect on the Pearcey-Gaussian pulse using the stepwise Fourier al-gorithm. The results show that the integral term coefficients have precise regulation on the shape and intensity distribution of the main flap; the truncation factor, on the other hand, can significantly change the intensity distribution of the side flap, and the nonlinear intensity regulates the spectral peak intensity. Meanwhile, all three factors affect the number of shed solitons. These findings deepen the understanding of the Pearcey-Gaussian pulse splitting mechanism under various parameters and provide new insights into pulse shaping in fiber optic communication systems.