Bright and Dark Soliton Pulse in Solid Core Photonic Crystal Fibers

Abstract

The nonlinear Schrodinger equation was utilized to conduct an analytical study on the soliton control in homogeneous photonic crystal fibers within both the normal and anomalous dispersion regimes. The split step Fourier method and MATLAB computation were used to generate the analytical soliton solutions for the nonlinear Schrodinger problem. The bright and dark soliton can be controlled by the group velocity distribution. It is capable of demonstrating the fabrication of a fully coherent photonic crystal fiber. Moreover, dark soliton pulses have been seen in photonic crystal fiber in the typical dispersion domain. Here we present the bound states of bright-dark soliton pairs that are mutually confined in a photonic crystal fiber. Solitons are produced when two modes with opposing dispersions are replanted. One laser operating in the anomalous dispersion domain produces the bright soliton, while the second laser running in the normal dispersion phase produces the dark soliton by normal dispersion cross-phase modulation with the light soliton. The results unequivocally point to a novel method of generating dark soliton pulses. Capturing both bright and dark solitons can produce light states that, interestingly, have a consistent power output and spectrally resemble a frequency comb. These results may have use in soliton states in atomic physics, ultrafast optics, frequency comb technologies, and telecommunications systems.  A radically new approach to the stabilization of powerful wave packages in the negative and positive group velocity dispersion regions of interacting waves is illustrated.