非线性递增光纤实现脉冲绝热压缩的数值研究

从脉冲绝热压缩的理论出发,提出一种利用非线性递增光纤实现脉冲绝热压缩的新方 案。数值研究的结果表明:当选取合适的光纤参量时,脉冲在非线性递增光纤中的压缩过程基本符合绝热脉冲压缩的要求;但由于非线性系数随传输距离增大而不断增大,使得高阶效应,尤其是拉曼自频移作用得到加强,从而出射脉冲相对于入射脉冲有明显的延时;即使考虑到高阶效应的作用,依然能得到很好的脉冲压缩效果。

Simulations of Adiabatic Optical Pulse Compression Using the Nonlinearity-increasing Fiber

Based on the adiabatic comp ression theory, adiabatic pulse comp ression using the nonlinearity-increasing fiber is suggested and investigated. The numerical results show that the pulse comp ression process satisfies the adiabatic comp ression condition in the nonlinearity-increasing fiber by selecting the approximate parameters. Even when the higher order effects is involved as the increased nonlinearity, pulse can still be well comp ressed although with the time delay caused by the Raman self-frequency-shift.