饱和对数非线性介质中非相干孤子碰撞对相干性的改善  

Coherence enhancement of spatially incoherent light beams through soliton interaction in logarithmically saturable nonlinear media

作　　者：黄春福[1] 郭儒[1] 刘思敏[1] 

机构地区：[1]南开大学物理学院,天津300071

出　　处：《物理学报》2006年第3期1218-1223,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60278006;60378013和10474047)资助的课题.~~

摘　　要：基于相干密度理论,数值地研究了饱和对数非线性支持的部分非相干亮孤子对的相互作用.研究表明,两个非相干亮孤子碰撞不仅能增大碰撞区的光强,还可以大大改善部分非相干光束的相干性.同时还研究了非相干性对孤子碰撞的影响,非相干性不仅抑制了孤子间的相干作用如吸引、排斥和能量交换,同时还由于非相干叠加作用而引入了弱的相互吸引.We investigate numerically the interaction between incoherent spatial solitons in a nonlinear medium with logarithmic saturable nonlinearity base on the coherent density approach. Numerical simulations show that both the intensity and the spatial coherence can be greatly enhanced through soliton interaction. At the same time, we show that the soliton interaction can be controlled by the total partial incoherence, which can not only suppress the coherent soliton interaction such as attractive, repulsive or exchange energy, but also induce weak attractive due to incoherent superposition of two incoherent solitons.

关 键 词：非相干性 饱和对数非线性 空间光孤子 

分 类 号：O437[机械工程—光学工程] TN929.11[理学—光学]