暗-暗与亮-暗光伏孤子相互作用  

Interaction of photovotaic spatial solitons between darkand dark as well as dark and bright

作　　者：江德生[1] 欧阳世根[1] 佘卫龙[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广州510275

出　　处：《物理学报》2004年第11期3777-3785,共9页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :10 0 740 82和 10 3 7412 1);广东省自然科学基金 (批准号 :0 0 1192和 0 3 15 67)资助的课题~~

摘　　要：用数值方法分析了平行传播异色光伏暗孤子之间及亮 暗孤子之间的相互作用 .结果表明 ,光伏暗孤子共轴传播能在有限的距离内保持准孤子形态 ,靠近传播时存在着相互吸引的作用 ,而相距较远传播时表现为一孤子暗区使另一孤子的缓变光场部分发生局部会聚作用 .光伏暗孤子与亮孤子的相互作用随距离的不同可使亮孤子光强分布变尖锐或变平缓 ,以及使亮孤子发生能量转移 .The parallel interaction between two photovoltaic spatial solitons of dark and dark as well as dark and bright with different wavelengths is investigated by numerical method. Our numerical study indicates that the dark solitons can both remain as quasi soliton form in certain distance while they propagate coaxially. However,they attract each other while closely overlapping. And they have a convergent effect on each other at the slowly varying region of optical field while in larger separations. For the case of interaction between dark and bright, the bright one may experience compression, expansion or energy transfer depending on their mutual separation.The physical interpretation of this solitons interaction is also given in terms of the refractive index waveguide they jointly induce.

关 键 词：暗孤子 孤子相互作用 亮孤子 光场 物理解释 光伏 相互吸引 信号光 波导 光强分布 

分 类 号：O431.2[机械工程—光学工程]