All-optical switches using solitons within nonlinear fibers
All-optical switches using solitons within nonlinear fibers
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DOI：
10.1080/09205071.2013.839961
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发表时间：
2013-11
影响因子：
1.3
通讯作者：
W.-J. Liu;M. Lei
中科院分区：
文献类型：
--
作者：
W.-J. Liu;M. Lei
摘要 本文研究了一种在非线性光纤中使用孤子的全光开关。利用符号计算和 Hirota 方法推导了耦合非线性薛定谔方程的解析二孤子解。显示了孤子之间的非弹性相互作用，并分析了全光切换动力学。在光纤的反常色散区域中，高强度光由低强度光控制。此外，全光开关的亮孤子是在光纤的正常色散状态下获得的。讨论了光纤非线性、群速度色散和群速度倒数的影响。光纤正常色散区域中的非线性效应比异常色散区域中的非线性效应影响更小，并且通过改变群速度来调整切换阈值功率。通过提高群速度色散，可以用较短的光纤长度实现全光开关，并且可以在不受色散限制的情况下减小光路的尺寸。本文的结果可能会推动全光交换机在计算、信息处理和网络方面的潜在应用。
Abstract A type of all-optical switches using solitons within nonlinear fibers is studied in this paper. Analytic two-soliton solutions for the coupled nonlinear Schrödinger equations are derived with symbolic computation and Hirota method. Inelastic interactions between solitons are displayed, and the all-optical switching dynamics is analyzed. The high-intensity light is controlled with the low-intense light in the anomalous dispersion regime of fibers. Besides, the bright solitons for the all-optical switches are obtained in the normal dispersion regime of fibers. Influences of the fiber nonlinearity, group-velocity dispersion, and reciprocal of the group velocity are discussed. Nonlinear effects in the normal dispersion regime of fibers has less impact than them in the anomalous dispersion regime, and the switching threshold power is adapted through changing the group velocity. All-optical switches can be achieved with a short fiber length through increasing the group-velocity dispersion, and the size of optical circuits can be reduced without the dispersion limit. Results of this paper may drive potential applications of all-optical switches for computing, information processing, and networking.