Stability of Temporal Dark Soliton in PT-Symmetric Nonlinear Fiber Couplers in Normal Dispersion RegimeLida Safaei1*, Mohsen Hatami2 and Mahmood Borhani Zarndi1
- *Corresponding Author:
- Lida Safaei
Faculty of Science
Department of Physics
Yazd University, Yazd, Iran
Tel: +98 35 3123 2222
E-mail: [email protected]
Received Date: May 01, 2016; Accepted Date: November 07, 2016; Published Date: November 23, 2016
Citation: Safaei L, Hatami M, Zarndi MB (2016) Stability of Temporal Dark Soliton in PT-Symmetric Nonlinear Fiber Couplers in Normal Dispersion Regime. J Laser Opt Photonics 3:141. doi: 10.4172/2469-410X.1000141
Copyright: © 2016 Safaei L, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In this paper, we present analytical soliton solutions in a nonlinear PT-symmetric coupler with gain in one fiber and loss in the other one in the normal dispersion regime. As usual, we derive a temporal dark soliton solution for the coupler in the normal dispersion regime. We study the stability of the soliton solution by imposing a perturbation in the system by using the eigenvalue method. The results show that there exist two forms of perturbed soliton solutions, bright and dark. The numerical calculations show that the perturbed solutions in the bright form are stable and the dark form are unstable. Previous works in bright solitons show that there exists only one perturbed bright soliton solution which is stable only in particular regions.