中国物理B ›› 2009, Vol. 18 ›› Issue (1): 209-214.doi: 10.1088/1674-1056/18/1/034

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Modulational instability of incoherently coupled beams in azobenzene-containing polymer with photoisomerization nonlinearity

张冰志, 崔虎, 佘卫龙   

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
  • 收稿日期:2008-04-08 修回日期:2008-07-05 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10574167).

Modulational instability of incoherently coupled beams in azobenzene-containing polymer with photoisomerization nonlinearity

Zhang Bing-Zhi(张冰志), Cui Hu(崔虎), and She Wei-Long (佘卫龙)†   

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
  • Received:2008-04-08 Revised:2008-07-05 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10574167).

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摘要： The modulational instability of two incoherently coupled beams in azobenzene-containing polymer with photoisomerization nonlinearity is investigated analytically and numerically. Our results show that as a precursor to spatial optical soliton formation, modulational instability can be adjusted and controlled by the wavelength combinations of the signal and background beams. We also discuss the dependences of strength of modulational instability on intensities of two signal beams and background beam. These findings make it possible to predict the formation of incoherently coupled soliton pairs in azobenzene-containing polymer.

Abstract: The modulational instability of two incoherently coupled beams in azobenzene-containing polymer with photoisomerization nonlinearity is investigated analytically and numerically. Our results show that as a precursor to spatial optical soliton formation, modulational instability can be adjusted and controlled by the wavelength combinations of the signal and background beams. We also discuss the dependences of strength of modulational instability on intensities of two signal beams and background beam. These findings make it possible to predict the formation of incoherently coupled soliton pairs in azobenzene-containing polymer.

Key words: modulational instability, azobenzene-containing polymer, photoisomerization nonlinearity

中图分类号:  (Isomerization and rearrangement)

  • 82.30.Qt
42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics) 42.65.Tg (Optical solitons; nonlinear guided waves) 82.50.-m (Photochemistry)