三芯非线性光纤耦合器中的短脉冲光开关

摘要

利用变分法研究三芯非线性光纤耦合器中的短脉冲光开关，解析分析线性三耦合非线性Schridinger方程的结果与数值模拟符合得很好.并且得到在非线性光纤耦合器中孤子的耦合长度和开关阈值，与连续波情况和两芯光纤耦合器的结果不同.%The propagation and switching of short optical pulses in a three-core nonlinear fiber coupler have been investigated with a variation method within the framework of the Lagrangian density formulation.The analytical solutions were directly obtained from the coupled nonlinear Schridinger equations.It is shown that the soliton switching behavior predicted by the present analytical method agrees well with the results from numerical analysis.In addition,the coupling length and the switching threshold of solitons in a nonlinear coupler were obtained.