有源非线性光纤布拉格光栅开关特性数值仿真

Numerical Simulation of Switching in Active Nonlinear Fiber Bragg Grating

基于非线性耦合模方程,利用龙格-库塔法,该文研究了有源光纤光栅中的光子带隙结构和光开关特性,分析了增益对光纤光栅中非线性色散和开关特性的影响。研究表明,增加增益将导致光纤中的阻带向更低频率移动,同时能增大开关陡峭性、降低开关临界功率、提高开关效率,选取适当的增益可以得到理想的开关特性。

Based on nonlinear coupled-mode equations and the fourth order Runge-Kutta method,the nonlinear dispersion effect and switching in active nonlinear fiber Bragg grating is numerically investigated.It is demonstrated that the gain can shift the stop band toward lower frequencies as well as sharpen the switching characteristic,lower considerably the switching critical energy.