Chirped Optical Solitons in Fiber Bragg Gratings with Dispersive Reflectivity

The present work investigates the chirped optical solitons in a medium of fiber Bragg gratings (BGs) with dispersive reflectivity. BGs is considered here with polynomial law of nonlinear refractive index. The model of coupled nonlinear Schrödinger equations is analyzed and reduced to an integrable form under specific conditions. The results are obtained with the aid of the soliton ansatz technique. Different structures of solutions including W-shaped, bright, dark, kink, and anti-kink solitons are retrieved. The behaviors of chirped optical solitons are illustrated graphically and described physically which may enhance the applications of fiber BGs.