Chirped gap solitons in fiber Bragg gratings with polynomial law of nonlinear refractive index

Khalil S. Al-Ghafri*, Mani Sankar, Edamana V. Krishnan, Salam Khan, Anjan Biswas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The objective of the present study is to examine the behaviors of chirped optical solitons in fiber Bragg gratings (BGs) with dispersive reflectivity. The form of nonlinear refractive index represents polynomial law nonlinearity. By virtue of phase-matching condition, the discussed model of coupled nonlinear Schrödinger equation is reduced to an integrable form. Consequently, chirped optical solitons having various profiles such as W-shaped, bright, dark, kink and anti-kink solitons are derived. Further to this, the chirp associated with these soliton structures are extracted. The impact of dispersive reflectivity, self-phase modulation and cross-phase modulation on the pulse propagation is investigated and it is induced that the changes of self-phase modulation and cross-phase modulation cause a marked rise in soliton amplitude which is subject to minor variations by dispersive reflectivity. The physical evolutions of chirped optical solitons are described along with the corresponding chirp to pave the way for possible applications in the field of fiber BGs.

Original languageEnglish
Article number30
JournalJournal of the European Optical Society-Rapid Publications
Volume19
Issue number1
DOIs
Publication statusPublished - 2023
Externally publishedYes

Keywords

  • Bragg gratings
  • Chirped solitons
  • Polynomial law

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