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《Laser & Infrared》 2011-02
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Temporal behavior of the low-amplitude bright spatial soliton in two-photon centrosymmetric photorefractive media

JI Xuan-mang1,WANG Jin-lai1,JIANG Qi-chang1,LIU Jin-song2(1.Department of Physics and Electronic Engineering,Yuncheng University,Yuncheng 044000,China;2.College of Optoelectronic Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)  
To study the temporal properties of the low-amplitude bright spatial solitons in biased two-photon centrosymmetric photorefractive crystals,we present the expressions of the time-dependent spatial charge field and the equation of the spatial profile for the bright solitons as time evolve.The numerical results show that solitons width decreases monotonically to a minimum value toward steady state with the increasing of time.The higher the ratio of soliton peak intensity to the dark irradiation intensity,the narrower the width of bright solitons under within propagation time.The input beam can evolve the steady spatial solitons under different time.The results are benefit for improving the theory of spatial photorefractive solitons.
【Fund】: 山西省高等学校科技开发基金项目的课题(No.200611042)资助
【CateGory Index】: O437
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