Effects of frequency-dependent Kerr nonlinearity on higher-order soliton evolution in a photonic crystal fiber with one zero-dispersion wavelength
Saili Zhao, Ruijun Guo, Yong Zeng
Abstract
We show that the higher-order soliton evolution can be considerably affected by the relative positions of the zero-nonlinearity wavelength (ZNW) and zero-dispersion wavelength (ZDW) with respect to the input wavelength in photonic crystal fibers (PCFs) with frequency-dependent Kerr nonlinearity. By regulating the magnitude of nonlinear dispersion, the position of the ZNW and the strength of the doping Kerr nonlinearity can vary to a large extent, which significantly changes the general process of higher-order soliton evolution in the PCFs. Particularly, some interesting phenomena observed numerically in the PCFs with one ZDW and one ZNW are as follows: the formation of a blueshifted fundamental soliton that satisfies the phase-matching and group-velocity-matching conditions with a redshifted fundamental soliton, the tunneling effect of a fundamental soliton that transfers from one solitonic region to another one through a spectrally limited nonsolitonic region, and the generation of the high-intensity blueshifted dispersive wave and redshifted dispersive wave.