暗孤子在高斯变迹光纤光栅中的演化  

Evolution of dark solitons in Gaussion-apodized fiber Bragg gratings

作　　者：迎春[1,2] 贾维国[1] 敖特根[3] 周彦勇[1] 包红梅[1] 

机构地区：[1]内蒙古大学物理系,呼和浩特010021 [2]内蒙古工业大学物理系,呼和浩特010051 [3]内蒙古化工职业学院,呼和浩特010010

出　　处：《光学技术》2008年第S1期119-122,共4页Optical Technique

基　　金：国家自然科学基金资助项目(60468001)

摘　　要：运用快速傅里叶方法数值模拟了暗孤子在高斯变迹光纤光栅中的演化以及暗孤子之间的相互作用。结果表明,在一定条件下光纤光栅的正常色散区可以维持暗孤子的稳定传输,并且孤子的稳定性与f的取值(孤子离禁带的位置)和非线性系数有关。输入两个暗孤子时,孤子之间的相互作用随f的增大而加强,当f继续增大时孤子中心和背景处出现震荡现象并演化产生灰孤子;f越大,两个孤子的稳定性对非线性效应越敏感。Transmission of the dark solitons and interaction of the dark solitons are simulated with the split step Fourier method in Gaussion-apodized fiber Bragg gratings.According to the numerical results,under certain conditions, dark soliton transmission can be maintained in the normal dispersion regime of fiber grating,and the stability of solitons rely on the value of f and nonlinear coefficient.With the increasing interaction between the two dark solitons is strengthened and vibration in the soliton centers or in the context is produced and gray solitons is produced.And the greaterthe stability of solitons is more sensitive to the nonlinear effects.

关 键 词：非线性光学 暗孤子 高斯变迹函数 光纤光栅 正常色散区 

分 类 号：TN253[电子电信—物理电子学]