色散管理孤子系统中调制不稳定性的研究

Study on modulational instability in dispersion-managed soliton systems

文章从色散管理孤子(DMS)在光纤中传输满足的非线性薛定谔方程出发,推导出DMS系统中调制不稳定性(MI)增益谱的表达式,并给出了数值模拟结果。结果表明:色散管理图强度越强,对MI过程产生的增益的抑制作用越大;路径平均色散越大,抑制MI过程产生的增益越明显。

Starting from the nonlinear Schrodinger equation describing the propagation of Dispersion-Managed Soliton （DMS） in optical fibers, the expression for the gain spectrum of the Modulational Instability （MI） in the DMS system is deduced and its numerical simulation results given, which show that the stronger the dispersion-map intensity, the greater the control of the gain in the MI process and the greater the path-average dispersion, the more evident the control of the gain in the process.