Stabilization of optical solitons in chirped PT-symmetric lattices

doi:10.1088/1674-1056/22/7/074209

Abstract We investigate the stability properties of optical solitons in a chirped PT-symmetric lattice whose frequency changes in the transverse direction. Linear-stability analysis together with the direct propagation simulations demonstrates that the chirped lattice can improve the stability of optical solitons dramatically. The instability of fundamental solitons can be completely suppressed if the chirp rate exceeds a critical value. A broad stability area of dipole solitons appears if the lattice appropriately chirped. Thus, we propose an effective way to suppress the instability of solitons in PT-symmetric potentials.

Keywords: stability chirp rate PT-symmetric lattices

Received: 04 September 2012
Revised: 20 December 2012
Accepted manuscript online:

PACS:	42.65.Tg	(Optical solitons; nonlinear guided waves)
	42.65.Jx	(Beam trapping, self-focusing and defocusing; self-phase modulation)
	42.65.Wi	(Nonlinear waveguides)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11074221) and the Program for Innovative Research Team, Zhejiang Normal University, Jinhua, Zhejiang Province, China.

Corresponding Authors: Dong Liang-Wei
E-mail: donglw@zjnu.cn

Cite this article:

Li Chun-Yan (李春艳), Huang Chang-Ming (黄长明), Dong Liang-Wei (董亮伟) Stabilization of optical solitons in chirped PT-symmetric lattices 2013 Chin. Phys. B 22 074209

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