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《Acta Optica Sinica》 2011-02
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Study on Modulation Instability of Broad Polychromatic Beams in Photovoltaic Crystal

Peng Xiaolan1 Zhou Yamin2 Wang Hongcheng1(1College of Electronic Engineering,Dongguan University of Technology,Dongguan,Guangdong 523808,China2College of Chemistry and Evironmental Engineering,Dongguan University of Technology,Dongguan,Guangdong 523808,China)  
The modulation instability of two broad beams with different frequencies is investigated in a photovoltaic photorefractive crystal with a uniform background illumination.It is shown that modulation instability of broad polychromatic beams can be adjusted and controlled by the Glass coefficient ratios(r1,r2) of the signal and background beams.It is also found that the strength of modulation instability depends on the ratio of beam intensities f and g.For the case of r11,r21,the maximum modulation instability gain increases first and then decreases with the increase of g when f0.5,while it decreases monotonically when f0.5.For large g,the modulation instability is suppressed and tends to be 0.For the case r11,r21,the signal beam whose r2 is less than 1 can suppress the modulation instability of the other signal beam whose r11 when f4.If f4,the modulation gain is always very small.For the case r11,r21,the polychromatic broad beams do not undergo modulation instability.
【Fund】: 东莞市科技计划项目(200910814038);; 广东省高校优秀青年创新人才培养计划项目(LYM10124)资助课题
【CateGory Index】: O437
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【Citations】
Chinese Journal Full-text Database 10 Hits
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 WANG Hong-cheng,XU Yong-zhao,LING Dong-xiong(Department of Electronic Engineering,Dongguan University of Technology,Dongguan 523808,CHN);Incoherently Coupled Anti-dark Soliton Families in Cubic-quintic Nonlinear Media[J];半导体光子学与技术(英文版);2009-02
2 Wang HongchengJiang DeshengWang XiaoshengShe Weilong(State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275);Study on One-Dimensional Gray Photovoltaic Spatial Solitons and Their Stability[J];Acta Optica Sinica;2005-08
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4 Dong Liangwei1,2 Ma Lihong1,2 Wang Hui2 1 College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua 321004 2 Institute of Information Optics,Zhejiang Normal University,Jinhua 321004;Self-Bending Effect of Spatial Soliton in Photorefractive Medium[J];Acta Optica Sinica;2007-08
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