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Chin. Phys. B, 2009, Vol. 18(1): 209-214    DOI: 10.1088/1674-1056/18/1/034
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

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)
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
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.
Keywords:  modulational instability      azobenzene-containing polymer      photoisomerization nonlinearity  
Received:  08 April 2008      Revised:  05 July 2008      Accepted manuscript online: 
PACS:  82.30.Qt (Isomerization and rearrangement)  
  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)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10574167).

Cite this article: 

Zhang Bing-Zhi(张冰志), Cui Hu(崔虎), and She Wei-Long (佘卫龙) Modulational instability of incoherently coupled beams in azobenzene-containing polymer with photoisomerization nonlinearity 2009 Chin. Phys. B 18 209

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