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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.
Acknowledgments
We express our sincere thanks to the Editors and Referee for their valuable comments. This work has been supported by the National Natural Science Foundation of China under Grant No. 60772023, by the Fundamental Research Funds for the Central Universities of China (Grant Nos. 2012RC0706 and 2011BUPTYB02), and by the National Basic Research Program of China (Grant No. 2010CB923200).