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

作　　者：张冰志 崔虎 佘卫龙 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,Sun Yat-Sen University

出　　处：《Chinese Physics B》2009年第1期209-214,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No 10574167)

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.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.

关 键 词：modulational instability azobenzene-containing polymer photoisomerization nonlinearity 

分 类 号：O437[机械工程—光学工程]