摘要
利用数值模拟的方法研究了(1+1)维孤子光束倾斜入射非局域非线性分界面的传输规律。研究发现,光束在非局域非线性分界面处的传输规律的光强依赖特性可以用入射光束的5个束宽节点来刻画,分别标志导致反射或透射光束的传输规律发生突变时的入射光束的5个临界光强值。计算还发现,如果保持入射光束束宽不变,而增加其功率,呼吸子光束入射分界面后的传输也能呈现相应的5个突变点,说明功率依赖实质上就是光强依赖。此外还研究了5个束宽节点的值随非局域程度的变化而变化的规律。
The propagation of a（1＋1）D spatial optical soliton beam at an oblique angle of incidence to a nonlocal nonlinear interface is studied by using numerical method.It is found that the intensity dependence of the propagation of a light beam at a nonlinear nonlocal interface can be portrayed by 5 node points of beam width of the incident soliton beam,which mark respectively 5 critical intensity value of the incident beam that cause the sudden changes of the propagation of the reflection or the transmission beam.It is also found that with the incident beam width keep unchanged and its power is increased,the 5 sudden change points of the propagation of the incident optical breathing beam can also arise,which illustrate that the power dependence is essentially intensity dependence.The change of the values of the 5 node points of beam width of the incident soliton beam with the change of nonlocality degree is also studied.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2011年第5期164-171,共8页
Acta Optica Sinica
基金
国家青年自然科学基金(21310019)资助课题
关键词
非线性光学
空间光孤子
分步傅里叶方法
非局域非线性分界面
非线性情形
束宽节点
nonlinear optics
spatial optical soliton
split-step Fourier method
nonlocal nonlinear interface
nonlinear regime
node of beam width
