双光子非相干耦合亮-暗混合屏蔽光伏孤子族  

Two-photon incoherently coupled bright-dark hybrid screening-photovoltaic spatial soliton families

作　　者：吉选芒[1] 姜其畅[1] 刘劲松[2] 

机构地区：[1]运城学院物理与电子工程系,运城044000 [2]华中科技大学光电子科学与工程学院,武汉430074

出　　处：《激光技术》2010年第5期619-623,共5页Laser Technology

基　　金：山西省高等学校科技开发基金资助项目(200611042)

摘　　要：为了得到双光子非相干耦合亮-暗混合屏蔽光伏孤子族的结果,采用数值模拟方法,对稳态情况下多束互不相干的光束,在有外加电场的双光子光伏光折变晶体中的传播进行了研究。结果表明,具有相同偏振和相同波长的多束互不相干的入射光束,可在晶体中形成双光子非相干耦合亮-暗混合屏蔽光伏孤子族。双光子非相干耦合屏蔽光伏孤子族,可以看成是屏蔽孤子族和光伏孤子族的统一形式。当光伏场可忽略时,屏蔽光伏孤子族就转化为屏蔽孤子族,而当外加电场不存在时,屏蔽光伏孤子族相当于开路和闭路条件下的光伏孤子族。当孤子族中只含有两个光束分量时,孤子族就变为屏蔽光伏孤子对。研究结果可为空间光孤子理论的发展提供理论依据。In order to obtain results of the two-photon incoherently coupled bright-dark hybrid screening-photovohaic spatial soliton families, the propagation of multiple mutually incoherent optical beams in biased two-photon photovoltaic-photorefractive crystal were numerically studied under steady-state conditions. It is shown that two-photon incoherently coupled bright-dark hybrid sereening-photovohaic soliton families can be established in the crystals with mutually incoherent incident beams at the same wavelength and polarization incident in the crystal. The screening-photovoltaic soliton families can be considered as the united form of screening soliton families and photovoltaic soliton families. When the photovohaic effect is negligible, the screening-photovohaic soliton families are the screening one. If the external field is absent, the sereening-photovoltaic soliton families are photovohaie ones under the open- and closed-circuit condition. Such soliton families reduce to screening-photovoltaic soliton pairs when they contain only two components. It turned out that this research provides theoretic basis for development of the spatial solitons theory.

关 键 词：非线性光学 光折变效应 双光子光折变介质 空间孤子族 

分 类 号：O437[机械工程—光学工程]