光子晶体光纤中高阶色散和非线性对压缩脉冲对的影响

Effect of High-order Dispersion and Nonlinear on Compression Pulse Pair in PCF

数值模拟了光子晶体光纤中波长位于反常色散区的高阶孤子泵浦脉冲与波长在正常色散区的信号脉冲通过交叉相位调制作用,产生的压缩脉冲对。首先讨论了在高阶色散影响下,飞秒脉冲基于交叉相位作用,弱脉冲产生的压缩脉冲对不再保持对称不变,产生蓝移。此外,考虑高阶非线性效应的影响,飞秒信号脉冲从正常色散区频移到反常色散区,产生的压缩脉冲由两个演变成一个,受拉曼红移影响较大,同时脉冲的峰值功率显著增加。

In this paper,numerically simulate that high-order soliton pump-pulse at wavelength anomalous dispersion district and the signal pulse wavelength in the normal dispersion, through cross-phase modulation effects, under Raman scattering effects, produce compression pulse pair in photonic crystal fibers. First ,we discussed under the influence of the higher-order dispersion,femtosecond pulse based on cross-phase modulation ,produced pulse pair no longer maintaln symmetry,but generated a blue shift. In addition,considering the impact of high-order nonlinear effect,femtosecond pulse signal from the normal frequency dispersion district moved to the anomalous dispersion district, the generated pulse evolved from two to one,is greatly impacted by Raman redshift, at the same time, the peak power pulses significantly increase.