We numerically investigate the evolution of Airy-Gaussian (AiG) pulses in photonic crystal fiber with two zero-dispersion wavelengths. Firstly, in the absence of higher-order nonlinear effects, the effects of three essential parameters of AiG pulses (truncation coefficient, distribution factor, and initial chirp) on the pulse evolution are studied in detail. The results indicate that initial AiG pump pulses with a small truncation coefficient, small distribution factor, and positive chirp are beneficial for obtaining a wider supercontinuum spectrum. Moreover, we further take stimulated Raman scattering (SRS) and self-steepening (SS) effects into account, and find that SRS greatly broadens the output spectrum when AiG pulses with a small distribution factor (χ₀ = 0.1), however, it also leads to obvious spectrum collapse and the collapse will be reduced to a certain extent due to SS.

我们数值研究了具有两个零色散波长的光子晶体光纤中艾里-高斯 (AiG) 脉冲的演变。首先，在没有高阶非线性效应的情况下，详细研究了AiG脉冲的三个基本参数（截断系数、分布因子和初始啁啾）对脉冲演化的影响。结果表明，具有小截断系数、小分布因子和正啁啾的初始AiG泵浦脉冲有利于获得更宽的超连续谱。此外，我们进一步考虑了受激拉曼散射 (SRS) 和自陡 (SS) 效应，发现当 AiG 脉冲具有小分布因子 ( χ ₀ = 0.1)，但是也会导致明显的频谱塌陷，并且由于 SS 会在一定程度上减少塌陷。