中国物理B ›› 2013, Vol. 22 ›› Issue (7): 74209-074209.doi: 10.1088/1674-1056/22/7/074209

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Stabilization of optical solitons in chirped PT-symmetric lattices

李春艳a, 黄长明a, 董亮伟b   

  1. a Department of Physics, Zhejiang Normal University, Jinhua 321004, China;
    b Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China
  • 收稿日期:2012-09-04 修回日期:2012-12-20 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    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.

Stabilization of optical solitons in chirped PT-symmetric lattices

Li Chun-Yan (李春艳)a, Huang Chang-Ming (黄长明)a, Dong Liang-Wei (董亮伟)b   

  1. a Department of Physics, Zhejiang Normal University, Jinhua 321004, China;
    b Institute of Information Optics, Zhejiang Normal University, Jinhua 321004, China
  • Received:2012-09-04 Revised:2012-12-20 Online:2013-06-01 Published:2013-06-01
  • Contact: Dong Liang-Wei E-mail:donglw@zjnu.cn
  • Supported by:
    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.

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摘要： 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.

关键词: stability, chirp rate, PT-symmetric lattices

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.

Key words: stability, chirp rate, PT-symmetric lattices

中图分类号:  (Optical solitons; nonlinear guided waves)

  • 42.65.Tg
42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.65.Wi (Nonlinear waveguides)