Chirped spatial solitons on a continuous-wave background in weak nonlocal media with polynomial law of nonlinearity

• DOI: 10.1016/j.physleta.2023.128731
• Publication Date: 2023-03-02T13:09:05Z
• Authors: Abdelouahab Messo...; Houria Triki; Yaxian Liu; Anjan Biswas; Yakup Yıldırım; Abdulah A. Alghamdi; Qin Zhou
• Keywords: Cubic-Quintic-Septimal Nonlinearity; Nonlocal Media; Solitons on a Continuous-Wave Background; 0103 physical sciences; 01 natural sciences

Abstract Spatial soliton propagation in a cubic-quintic-septimal optical material with a weakly nonlocal response is examined. We demonstrate that bright and gray solitons on a continuous-wave background exist for the envelope equation describing their dynamis in the physical media. In addition, optical kink and anti-kink type solitons are also identified. We find that these waveforms exhibit a frequency chirping property which is inversely proportional to the beam intensity. A noteworthy characteristic is that the chirped soliton solutions include no free parameters and their properties such as their amplitude, spatial width and propagation constant are determined solely by the material parameters. The numerical examples are structured for illustrating the propagation dynamics of these solitons in the optical system. The role of weak nonlocality on the modulation instability gain has also been discussed.