参数渐减光纤中孤子间相互作用的数值研究  

The Numerical Study on Interaction between Two Solitons in a Parameter-Decreasing Fiber

作　　者：杨荣草[1] 郝瑞宇[1] 周国生[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《量子光学学报》2005年第1期34-38,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(60244006)

摘　　要：从变系数非线性薛定谔方程出发,我们考虑了一种参数渐减光纤系统,并给出了皮秒孤子在该系统中相互作用的相对间距表达式。然后,采用数值模拟方法对皮秒和飞秒尺度下相邻孤子在该系统中的相互作用进行了详细的研究,并与均匀光纤中孤子间的相互作用进行了比较。结果表明:相邻孤子在参数渐减光纤中的相互作用比在均匀光纤中的相互作用相对较弱,选择适当的渐减系数有助于抑制孤子间的相互作用,提高光纤的传输比特率。Starting from the nonlinear Schrdinger equation with variable coefficients, we consider a parameter-decreasing fiber system. Based on the transformation between the nonlinear Schrdinger equation with variable coefficients and the standard nonlinear Schrdinger equation, the separation expression of neighboring picosecond solitons in this system is presented. Then the interaction between two solitons in picosecond and femtosecond dimensions is studied in detail by numerical method. The results show that the interaction between two solitons in a parameter-decreasing fiber is weaker than that in an ideal homogeneous fiber. It is helpful to reduce the interaction between two solitons by appropriately selecting the decreasing coefficient of the fiber parameters and to provide the theoretical basis for increasing the transmission bit-rate in optical telecommunications.

关 键 词：孤子 参数渐减光纤 相互作用 数值模拟 

分 类 号：O431[机械工程—光学工程]