Abstract
In this paper, soliton propagation in an erbium-doped fiber with inhomogeneous broadening is considered which can be described by the inhomogeneous Hirota– Maxwell–Bloch equations. The Darboux transformation method is employed to generate the soliton solution through a linear eigenvalue problem. In particular, our results demonstrate explicitly that a soliton can be converted into various nonlinear waves such as periodic wave, anti-kink soliton and flat-top soliton in the presence of higher-order effects with inhomogeneous broadening. Additionally, we found that higher-order coefficients have strong influence on the soliton transition while frequency is only responsible for phase shift. The results might be of certain value for the study of the soliton management and soliton conversion.
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Appendix
Appendix
- q(z, t):
-
Complex envelope of the field
- p(z, t):
-
Polarization of the resonant medium
- \(q_t \) :
-
Group velocity
- A(z):
-
Averaging with respect to inhomogeneous broadening of the resonant frequency
- \((\delta +\mu t)\) :
-
Linear inhomogeneous coefficient
- \(\eta (z,t)\) :
-
Population inversion
- \(\sigma \) :
-
Coefficient of second-order dispersion and self-phase modulation
- \(\gamma \) :
-
Coefficient of third-order dispersion and self-steepening
- \(\omega \) :
-
Frequency.
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Vithya, A., Mani Rajan, M.S. & Arun Prakash, S. Combined effects of frequency and higher-order effects on soliton conversion in an erbium fiber with inhomogeneous broadening. Nonlinear Dyn 91, 687–696 (2018). https://doi.org/10.1007/s11071-017-3903-5
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DOI: https://doi.org/10.1007/s11071-017-3903-5