Pt-Symmetric Nonlinear Directional Fiber Couplers with Gain and Loss for Ultrashort Optical PulsesSafaei L1*, Zarndi MB1 and Hatami M2
- *Corresponding Author:
- Safaei L
Faculty of Science
Department of Physics
Yazd University, Yazd, Iran
Tel: +98 35 3123 2222
E-mail: [email protected]
Received Date: May 03, 2017; Accepted Date: May 17, 2017; Published Date: June 20, 2017
Citation: Safaei L, Zarndi MB, Hatami M (2017) Pt-Symmetric Nonlinear Directional Fiber Couplers with Gain and Loss for Ultrashort Optical Pulses. J Laser Opt Photonics 4: 155. doi: 10.4172/2469-410X.1000155
Copyright: © 2017 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 study the higher-order nonlinear Schrdinger (HNLS) equations for a directional fiber optic coupler with the third-order dispersion (TOD), self-steeping (SS) and stimulated Raman scattering (SRS) effects and gain in one waveguide and loss in the other. We have reduced the system equations to an uncoupled HNLS equation which has bright and dark soliton solutions. It is shown that the Hamiltonian for this equation has a PT-symmetric form. Furthermore the equilibrium points are found and the discussion about their stability is presented.