Analytical and numerical study of chirped optical solitons in a spatially inhomogeneous polynomial law fiber with parity-time symmetry potential  

作　　者：Yu Zhong Houria Triki Qin Zhou 

机构地区：[1]Research Group of Nonlinear Optical Science and Technology,School of Mathematical and Physical Sciences,Wuhan Textile University,Wuhan 430200,China [2]Radiation Physics Laboratory,Department of Physics,Faculty of Sciences,Badji Mokhtar University,P.O.Box 12,23000 Annaba,Algeria [3]State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China

出　　处：《Communications in Theoretical Physics》2023年第2期28-38,共11页理论物理通讯（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.11975172)

摘　　要：This work studies the dynamical transmission of chirped optical solitons in a spatially inhomogeneous nonlinear fiber with cubic-quintic-septic nonlinearity,weak nonlocal nonlinearity,self-frequency shift and parity-time(PT)symmetry potential.A generalized variable-coefficient nonlinear Schr?dinger equation that models the dynamical evolution of solitons has been investigated by the analytical method of similarity transformation and the numerical mixed method of split-step Fourier method and Runge–Kutta method.The analytical self-similar bright and kink solitons,as well as their associated frequency chirps,are derived for the first time.We found that the amplitude of the bright and kink solitons can be controlled by adjusting the imaginary part of the PT-symmetric potential.Moreover,the influence of the initial chirp parameter on the soliton pulse widths is quantitatively analyzed.It is worth emphasizing that we could control the chirp whether it is linear or nonlinear by adjusting optical fiber parameters.The simulation results of bright and kink solitons fit perfectly with the analytical ones,and the stabilities of these soliton solutions against noises are checked by numerical simulation.

关 键 词：SOLITONS SYMMETRY INHOMOGENEOUS 

分 类 号：O43[机械工程—光学工程]