中国物理B ›› 2010, Vol. 19 ›› Issue (2): 24211-024211.doi: 10.1088/1674-1056/19/2/024211

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Incoherently coupled soliton pairs in nonlocal nonlinear media

张彦鹏1, 卢克清2, 赵卫2, 张贻齐2, 张美志2, 张玉虹2, 程光华2, 李可昊3   

  1. (1)Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China; (2)State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3)State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2008-08-28 修回日期:2009-02-13 出版日期:2010-02-15 发布日期:2010-02-15

Incoherently coupled soliton pairs in nonlocal nonlinear media

Lu Ke-Qing(卢克清)a), Li Ke-Hao(李可昊)a)c), Zhao Wei(赵卫)a), Zhang Yi-Qi(张贻齐)a), Zhang Mei-Zhi(张美志) a),Zhang Yu-Hong(张玉虹)a), Cheng Guang-Hua(程光华)a), and Zhang Yan-Peng(张彦鹏)b)   

  1. a State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; b Department of Electronic Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2008-08-28 Revised:2009-02-13 Online:2010-02-15 Published:2010-02-15

摘要: We show that incoherently coupled soliton pairs can exist in nonlocal Kerr-type nonlinear media. Such solitons can propagate in bright--bright, dark--dark, and gray--gray configurations. When the nonlocal nonlinearity is absent, these bright--bright and dark--dark soliton pairs are those observed previously in local Kerr-type nonlinear media. Our analysis indicates that for a self-focusing nonlinearity the intensity full width half maximum (FWHM) of the bright--bright pair components increases with the degree of nonlocality of the nonlinear response, whereas for a self-defocusing nonlinearity the intensity FWHM of the dark--dark and gray--gray pair components decreases with the increase in the degree of nonlocality of the nonlinear response. The stability of these soliton pairs has been investigated numerically and it has been found that they are stable.

Abstract: We show that incoherently coupled soliton pairs can exist in nonlocal Kerr-type nonlinear media. Such solitons can propagate in bright--bright, dark--dark, and gray--gray configurations. When the nonlocal nonlinearity is absent, these bright--bright and dark--dark soliton pairs are those observed previously in local Kerr-type nonlinear media. Our analysis indicates that for a self-focusing nonlinearity the intensity full width half maximum (FWHM) of the bright--bright pair components increases with the degree of nonlocality of the nonlinear response, whereas for a self-defocusing nonlinearity the intensity FWHM of the dark--dark and gray--gray pair components decreases with the increase in the degree of nonlocality of the nonlinear response. The stability of these soliton pairs has been investigated numerically and it has been found that they are stable.

Key words: soliton pair, Kerr effect, nonlinear optics

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.Hw (Phase conjugation; photorefractive and Kerr effects)